What is Cryogenic Pipe Insulation and What Are the Best Systems?

The rising need for liquefied natural gas (LNG) demands high-performance technology, like cryogenic pipe insulation, to transport and store cryogenic gas reliably, ensuring safe and efficient processing facilities. Facilities convert natural gasses to liquid for shipping and storage because LNG takes 600 times less space than gas. However, it takes extremely low temperatures (-322 to -327 ℉) to transform natural gas into a liquid state.

It’s important to know that in order to maintain its liquid form, you must apply super insulation in cryogenics around all elements and systems in the facility that come into contact with the liquefied gas, including the pipes.

What is Cryogenic Insulation?

Cryogenic pipe insulation is utilized for the efficient transport and safe storage of cryogenic gasses because the insulation in cryogenics prevents heat gains that can vaporize the LNG and pressurize the system. Therefore, a well-designed cryogenic insulation system will ensure an LNG facility’s safe and efficient operation. 

Due to the low-temperature requirements of the liquefied gas, it is critical to insulate the pipes used to transport, and the tanks used to store the LNG. In addition, facilities must prevent thermal bridging around mechanical forces, like mounts and support bearings. These situations require high-performance cryogenic insulation that will:

  • Maintain its integrity in frigid temperatures 
  • Absorb high-mechanical forces
  • Ensure superior low-thermal conductivity

Cryogenic Pipe Insulation

Closed-cell, thermal plastic DuPont™ Styrofoam™ XPS PIB (sold by Polyguard) is a superior solution for cryogenic pipe installations. 

The design of easy-to-install Styrofoam™ PIB, with seamless billet and cell structure, allows for shop fabrication and field adjustment. You can cut and form Styrofoam™ in the field with an insulation knife.Polyguard Products offers detailed installation guidelines to assist in designing and installing Styrofoam™ PIB.

What Are the Best Systems?

Polyguard has products and accessories specifically designed to insulate piping in cryogenic, ammonia refrigeration, oil, gas, and chemical processing applications. For 20 years, we have successfully insulated millions of square feet of piping. 

Insulrap 30 NG Vapor Barrier Products

Polyguard designed our zero-perm, Insulrap™ 30 NG self-healing, vapor and moisture barrier/retarder membrane with a puncture-resistant (84 lbs) polymer/foil laminate film coated with a layer of rubberized asphalt. We specifically designed the barrier to insulate piping in cryogenic, ammonia refrigeration, oil, gas, and chemical processing applications.

The superior elastic properties of Insulrap™ 30 NG accommodate the expansion and contraction of the substrate. In addition, its white color improves reflectivity in the field, before jacketing. 

Application of Insulrap™ 30 NG

Easy to apply, peel and stick Insulrap™ 30 NG applies over DuPont™ Styrofoam™ XPS PIB insulation, by cigarette wrapping, immediately after removing a disposable silicone-coated release liner, which saves on labor and materials. The cigarette wrapping provides a 2-inch overlap of the membrane; however, wrapping the joints requires 4-inch butt strips. Use a roller to apply pressure and conform the vapor barrier to the insulation. Polyguard recommends the following steps to improve adhesion:

  • Provide warm storage for Insulrap™ 30 NG.
  • Before applying, use a heat gun to warm the rubberized asphalt surface. 
  • Apply Polyguard’s solvent or water-based activator to the insulation or laps. Note that the solvent-based activator may damage some foam insulation.
  • Only apply the barrier to clean Insulation, free of frost, moisture, dirt, dust, etc.

I-30-NG’s rubberized asphalt coating can lose adhesiveness at temperatures below 50° F. In addition, you must not leave the barrier exposed to ultraviolet light for more than 30 days.

Polyguard has two different Insulrap™ 30 NG products to meet the specific needs of your project:

  • Factory-controlled 30 mils thick Insulrap™ 30 NG provides a smooth surface.
  • Factory-controlled 30 mils thick Insulrap™ 30-SJ NG contains embedded fiberglass scrim reinforcement within the laminate to provide a smooth surface and enhance adhesion at the laps.

Burial Applications

If covered with a mechanical jacket, you can use Insulrap™ 30 NG in burial applications. For direct burial, applications refer to the datasheets for Insulrap™ 50 NG, or Insulrap™ 125 No Torch.

Insulrap™ 50 NG Products

Zero-Perm, self-healing, 50 mils thick Insulrap™ 50 NG vapor and water barrier membrane is a durable polymer film coated with a layer of rubberized asphalt.  

You can use INSULRAP 50 NG as the outer protective waterproofing jacket in a direct burial application that is clean, uniform, and free of rocks and debris backfill. However, a backfill containing rocks or debris requires Polyguard’s InsulShield™ rock shield, an outer wrap explicitly designed to go over Insulrap™ vapor barriers in direct burial applications in severe rocky areas to absorb soil stress. 

In addition, you should apply Polyguard Outerwrap to larger pipes because it provides high bursting strength and low tensile and elongation properties, resulting in an outer wrap with improved soil stress resistance.  

Insulrap™ 50 offers several significant advantages:

  • Speeds up completion time and lessens labor needs with no cure time or clean up 
  • Available in several sizes to suit specific projects: 4″ x 50′, 23″ x 75′, or 35″ x 75′ rolls – all with factory controlled uniform thickness 
  • Will stretch and flex to accommodate the movement of the substrate in warm and cold conditions 
  • Resists chemicals, acids, and alkalis

Application of Insulrap™ 50 NG

After removing the disposable silicone-coated release liner, the peel and stick membrane applies simply by cigarette wrapping the insulation around cold pipe and direct burial applications, with temperatures no higher than 150º F.

When cigarette wrapping, overlap the barrier a minimum of 3-inches. For areas where the membrane butts itself, apply 4-inch butt strips over the joints. Applying pressure with a roller will ensure a well-confirmed lap and insulation.  

Insulrap™ 50 comes in two product variations to meet your specific application needs: 

  •  Works well as an outer protective waterproofing jacket in a direct burial application when using clean, uniform fill, that is free of debris and rocks 
  •  Embedded fiberglass scrim reinforcement within the laminate to minimize the scrim profile for a smooth surface and enhanced lap adhesion.

Zero-Perm® Vapor Barrier Membrane

Polyguard, absolute Zero-Perm® vapor barrier membrane provides maximum protection for all insulation types used in below ambient, sub-freezing, and cryogenic applications on the duct, pipe, or vessel systems.

Three-ply, Zero-Perm® composite membrane consists of a white 0.5 mil polyester film, 1.0 mil aluminum foil (for zero permeance), and one 0.5 mils transparent polyester film (for toughness and tear resistance). Bright white and paper-free Zero-Perm® vapor barrier membranes provide puncture, tear, and mold resistance. 

You can use Zero-Perm® vapor barrier on various cold systems: 

  • Between layers of insulation on sub-freezing projects, like LNG piping
  • As the outer vapor-barrier jacket on ammonia, brine, or glycol systems 
  • Under mechanical jacketing, either metal or PVC 
  • On chilled water systems replacing ASJ and PVDC jacketing left exposed, or under a protective metal or PVC jacket 

Typically, Zero-Perm® is installed at the factory by a fabricator, but you can also do it in the field. Polyguard offers two high-quality acrylic adhesives with excellent cold-weather performance Zero-Perm tapes to complete installation in the field.

Polyguard Has the Best Solutions for Cryogenic Pipe Insulation

Polyguard has numerous products that support cryogenic pipe inclusion to prevent heat gains that can vaporize the LNG, and ensure safe storage and efficient transport of cryogenic gasses. 

Contact Polyguard professionals today for more on the best solution for your cryogenic pipe insulation. We can also provide technical information and services concerning thickness calculations, design guidelines and criteria, and installation and system use recommendations.

Radon Vapor Barrier: What Is It and How to Install It

How Radon Invades Your Home

Radon most commonly emerges as an odorless, colorless gas from the soil under your home’s foundation, developing from the decay of radioactive elements, radium, and uranium. The toxic gas enters your home through cracks or gaps in the concrete floor slab of your crawl space, basement, or slabs-on-grade. In addition, radon can pass through construction joints, sump holes, plumbing penetration, and suspended floors. 

To prevent dangerous radon from entering your home, apply high-quality products like Polyguard Underseal® Underslab Membrane and Polyguard TERM® Barrier Systems. Our products, in combination with fans and pipes, will help divert harmful radon away from your home, keeping your family safe and healthy.

Radon Hot Spots

The concentration and potential dangers of radon can vary significantly based on your location. The Environmental Protection Agency (EPA) provides a radon zone map to help evaluate your risk of radon exposure. The highest chance of dangerous radon levels occurs in the northern and eastern United States, while the lowest risk occurs in the southern states. 

The EPA mandates immediate mitigation for radon levels above 4 pCi/L, however, lower levels can still affect the health of your family. Radon accounts for the number one cause of lung cancer among nonsmokers. Therefore, the EPA recommends fixing your home for radon levels between 2 pCi/L and 4 pCi/L.

Constructing and Designing to Prevent Radon Poisoning 

Fortunately, we have the tools and knowledge to design and build homes that will keep your family safe from radon exposure. Mitigating radon away from the interior of your home requires an active soil depressurization (ASD) system that uses a vapor barrier (soil-gas retarder), fans, and piping, to create a low-pressure environment that gathers radon underneath the home. 

For new construction, regardless of your home’s foundation type, you must properly install a high-performance vapor barrier, like Polyguard Underseal® Underslab Membrane, to ensure an effective, high-quality ASD system. The fan draws radon-contaminated air from underneath the barrier, and vents it out through active and passive venting pipes, to prevent the dangerous gas from entering your home.

Existing Homes and Crawl Spaces

For existing homes that test high for radon, we recommend installing the vapor barrier in the crawl space close to the vents, along with fans and pipes, in order to lower radon levels and lessen health risks.

Standards for Radon-Resistant Construction

The EPA and the U.S. Green Building Council’s LEED program are guides for the current standard in radon-resistant construction techniques. The standards specify placing a 6-mil polyethylene vapor retarder on top of a 4-inch layer of clean, coarse gravel below the foundation. The barrier also prevents the concrete from clogging the gravel layer during the slab pour. 

In addition, the ASTM E 1745-09 (Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs) recommends a higher-quality barrier with the following, 

  • tensile strength of no less than 45.0 lb/in
  • puncture-resistance of 2200 grams

Achieving these standards requires 10-mil thick barriers made with state-of-the-art resins.

Polyguard Products Provide Superior Protection Against Radon Poisoning

Polyguard makes several products specifically designed to stop radon from getting into your home: Polyguard Underseal® Underslab Membrane and Polyguard TERM® Barrier Systems.

Polyguard Underseal® Underslab Membrane

At Polyguard, we recommend choosing a vapor barrier engineered for higher resistance to damage, lower diffusion, and longevity than either the EPA or ASTM standards. Our Underseal® Underslab Membrane will ensure a longer life expectancy, making it more cost-effective over the lifespan of your home. 

Tough, 85-mil Polyguard Underseal® Underslab Membrane is a pre-concrete pour vapor barrier that is designed to stop radon and methane gas emitting from the soil below the foundation from entering a home. It also eliminates vapor and water transmission through the concrete slabs on grade, protecting indoor air quality and floor finishes. 

Underseal® Underslab 3-layer composite membrane, installed horizontally or vertically, forms a continuous seal under the slab, to create a solid mechanical bond between the membrane and concrete.

Other benefits of Underseal® Underslab Membrane:

  • Superior puncture-resistance of 220 lbs, 64 times greater than the requirements of a Class A Vapor Barrier, will stand up to wear during construction 
  • Forms a strong mechanical bond to the concrete, eliminating water and vapor migration 
  • Creates a solid adhesive bond with the concrete surface to prevent water migration between the concrete and membrane 
  • Ease of installation due to its flexibility to adapt to the job site 
  • Full-adhering, watertight laps at all joints 
  • Stress-absorbing and elongation properties will maintain a watertight seal
  • May qualify for LEED Certification credits:
    • ID Credit 1 – Innovation in design
    • SS Credit 3 – Brownfield redevelopment 
    • AQ Credit 5 – Indoor Chemical and Pollutant Source Control (below-grade toxin barrier) 

Polyguard TERM® Barrier Systems

The TERM® Barrier Systems Division of Polyguard Products specializes in developing sustainable, pesticide-free barriers. TERM is a single building envelope solution for termites, energy leakage, radon, and moisture resistance.

TERM™ Flashing Barrier

Firm, pliable, peel and stick TERM Flashing Barrier, is applied horizontally where the concrete slab intersects with the exterior sheathing, and will act as a barrier to radon gas, termites, energy leaks, and moisture. 

Polyguard TERM™ Seam and Window Barrier

Sturdy, flexible, self-adhesive Polyguard TERM™ Seam and Window Barrier installs over joints of sheathing, and as a window flashing to block radon, moisture, energy, and termites.

TERM® Flashing Moisture | Termite Barrier

Peel and stick TERM® Flashing Moisture | Termite Barrier stops radon, moisture, and pest intrusions, along with energy leaks. It applies horizontally where the exterior sheath intersects with the concrete slab. 

Polyguard Products Can Protect Your Family from Dangerous Radon

All homeowners, particularly those in radon hot zones, should install adequate ASD systems during new construction. One in fifteen U.S. homes has radon levels at or above a dangerous level, which scientists report can lead to lung cancer. 

Choosing high-quality Polyguard vapor barriers as part of your ASD system will significantly reduce radon infiltration into your home. 

For more on understanding and installing a radon vapor barrier, don’t hesitate to contact the professionals at Polyguard today.

The Best Metal Roof Underlayment Option

Costly metal roofs require a high-quality metal roof underlayment to provide thermal protection and waterproofing for your home. Selecting the best underlayment for a metal roof will significantly improve the home’s health throughout its lifespan. It can also reduce the noise from rain. Underlayment also keeps the structure’s interior dry and provides a surface for contractors to walk on during construction.

What Goes Under Metal Roofing?

Roof underlayment for metal roofs installs directly over the decking and under the metal roof to provide an extra layer of protection against wind, moisture, chemicals, and resin. 

For years, manufacturers used felt as roofing underlayments in 15 lb rolls and stronger, thicker, 30 lb rolls. However, felt underlayments don’t last long and deteriorate in high temperatures. More recently, (last 20 years) synthetic underlayments have given homeowners another choice for roof underlayment. However, its low permeability rating makes it difficult to achieve proper ventilation. 

In addition thermal expansion and contraction of a metal roof can destroy felt and synthetic underlayment. 

The Best Underlayment For Metal Roofs

Metal roofs require an alternative underlayment to felt and synthetic, specifically shielding against water, ice, and vapor, which can damage your roof. The lifespan of the underlayment should match that of the metal roof, typically 40 to 70 years. 

Polyguard makes a superior metal roof underlayment as well as accessories to protect your beautiful metal roof for its entire lifetime. 

Deckguard® HT Roofing & Watershield Underlayment

Deckguard® HT Roofing & Watershield Underlayment will keep your roof deck and supporting structure dry when applied according to the manufacturer specifications and recommendations. Polyguard recommends hiring an experienced and qualified metal roofing contractor to ensure proper installation of your metal roof.

High-heat, 40-mil Deckguard® HT roofing membrane is a high strength slip-resistant spider web backing laminated to a high-performance, high heat asphalt compound. The high-temperature resistance of the Deckguard® HT roofing membrane allows for exposure to heat up to 260° F, along with several crucial benefits for protecting the integrity of your metal roof: 

Deckguard® HT waterproofing underlayment can be installed on sloped roof decks under the shingles for commercial and residential metal roofs. However, for Cor-Ten®, copper, or zinc metal roofing in high altitudes, please get in touch with Polyguard.

It resists water infiltration from water backup due to wind-driven rain and ice dams. However, to reduce the risk of moisture intrusion, use Deckguard® HT with other design features that minimize ice dams. Insulation and ventilation can reduce the ice dams’ size, and lessen condensation build-up, which is particularly vital in colder climates and mountainous regions. Don’t hesitate to contact a Polyguard representative with concerns or questions about how to prevent ice dams on your metal roof. 

Deckguard HT waterproofs leak areas around skylights, protrusions, valleys, and other flashing areas, and its self-sealing features will seal around nails, resisting leakage by water backing up due to wind-driving rains and ice dams. 

For ease of application, it contains a film release that activates a strong asphalt component to provide superior adhesion to the roof deck.

Preparing and Installing Deckguard® HT Roofing and WaterShielding Underlayment

You should only install Deckguard® HT on a clean, primed, and dry structural deck substrate, like wood, plywood, composite, concrete, metal, wood plank, or gypsum sheathing. You will need to remove old roofing materials, dust, dirt, and loose nails, before applying the membrane. In addition, repair and fill all voids or damaged areas of the deck with Detail Sealant PW™ because the membrane cannot span a crack larger than 1/16-inch. 

Eco-friendly, non-corrosive, non-staining Detail Sealant PW™ is a high-performing flexible sealant that can be used to fill minor cast concrete cracks, gaps at head joints, concrete masonry cracks, penetrations, and gypsum sheathing joints.

After cleaning and repairing the concrete, masonry, or wood roofing deck, prime it with solvent-based Polyguard® 650 LT Liquid Adhesive for temperatures above 32° F or water-based 650 WB Liquid Adhesive, for temperatures above 40° F. The primer must dry for one hour or until tack-free. Only prime areas that you plan to cover with underlayment on the same day. Priming before applying the Deckguard® HT will significantly improve the bonding between the membrane and substrate.

Install the Deckguard® HT at temperatures of 35° F, strictly following the manufacturer’s application procedures, precautions, and limitations.

The Best Metal Roof Underlayment Option – Deckguard® HT

Self-sealing, easy to install, Deckguard® HT roofing and waterproofing underlayment, and Polyguard adhesives and sealants, will protect your expensive metal roof from wind-driven rains and ice dams, preventing condensation and unhealthy and structurally damaging mold. Contact a Polyguard professional today for more on choosing the best metal roof underlayment option.

Understanding the Different Types of Industrial Coatings

Industrial coatings (paints) provide a long-term, cost-effective solution to protecting your equipment’s reliability, which is vital to maintaining a facility’s performance and profitability. In addition, applying a high-quality industrial coating system, like POLYGUARD RD-6® COATING SYSTEM will increase the service life of your equipment and infrastructure, preventing severe damage and expensive shutdowns.

Uncoated metal or concrete surfaces cannot withstand corrosion, abrasive wear, chemical exposure, erosion, high pressure and velocity, and heavy impact abrasion from large solids, which can significantly damage and/or reduce the lifespan of equipment and infrastructure. An industrial-coated surface will consistently outperform an untreated surface. 

What Are Industrial Coatings?

The design of industrial coating includes a resin, hardener, and reinforcement that creates durable protective properties with superior chemical resistance. 

Applying a chemically engineered industrial coating to a substrate, like steel, concrete, pipelines, storage tanks, etc., protects against workplace abrasion, fire, and harsh environmental conditions that can lead to corrosion. 

Lining the inside of water reservoirs and tanks with industrial coating products, for example, will protect against corrosion and create a safe environment for potable water. In the case of water standpipes and reservoirs, the industrial coating will also enhance the aesthetics of the base layer. Industrial coatings play an essential role in helping storage tanks, piping, penstock, and other industrial applications stand the test of time.

It is critical to use a high-quality industrial coating system to ensure a reliable, long-term solution in order to protect your expensive investment. 

What to Look for in High-Quality Industrial Coating Systems

High-performing industrial coating systems should create an impermeable barrier that resists penetrations of vapors, gasses, or fluids. The added strength of a high-quality industrial coating will minimize wear and tear and prevent excessive damage due to long-term environmental exposure; therefore, avoiding costly repairs and parts and extending the life of vital equipment and structures.

High-quality coatings contain no harmful volatile organic compounds (VOCs) and odors. Industrial coating systems often involve three vital steps: primer, full coating, and sealant.

Why Choose Polyguard High-Quality Industrial Coating Products?

Polyguard has numerous industrial coating products to protect your costly equipment and structures from corrosion, abrasive wear, chemical exposure, erosion, high pressure and velocity, and heavy impact abrasion from large solids. The POLYGUARD RD-6® COATING SYSTEM protects the equipment’s and structure’s integrity, preventing expensive repairs and shutdowns.  


You can use the non-shielding, anti-corrosion POLYGUARD RD-6® COATING SYSTEM on buried and submerged line pipe, rehabilitation, and new construction girth welds. You can also use RD-6® above ground; however, this requires a coating to protect against harmful ultraviolet (UV) rays, like the RD-6 UVO.

Polyguard makes the Polyguard’s RD-6® Coating System with POLYGUARD RD-6® COATING, POLYGUARD 600 liquid adhesive, a geotextile-backed protective pipeline coating for corrosion protection, and the POLYGUARD SP-6™ OUTERWRAP


Used since 1988, peel and stick POLYGUARD RD-6® COATING, easily applies with a Polyguard approved machine, like the Polyguard Wrapster, to ensure consistent and adequate tension during the application. The design of the Wrapster contains two spindles; one creates tension while applying the RD-6® to the pipe, while the other spools the release liner during application. You can only install rolled RD-6® coatings on pipelines with operating temperatures no higher than 145° F (63°C); however, we offer RD-6® HT for pipelines operating up to 190° F (88° C).

For RD-6® spots prone to bridging and tenting, we recommend POLYGUARD 606 FILLER COMPOUND, a cold-applied, fabric-reinforced protective coating. The polymer-modified compound contains a continuous filament thermoplastic fiber for reinforcement to add tensile strength and resist tearing. The flexible design of 606 FILLER COMPOUND allows it to fill irregular surfaces primed with 600 or 601 LIQUID ADHESIVE.

Advantages of RD-6®:

  • The woven geotextile polypropylene backing utilizes compressions and tension during the application process, ensuring the coating’s long-term performance. 
  • Non-shielding against cathodic protection currents, it is less likely to fail if the metal substrates and cathodic coating lose adherence (disbonded) along the pipeline.
  • The high adhesion makes it resistant to soil stress, a significant cause of coating disbondment. 
  • It provides superior water vapor transmission resistance.
  • It’s visco-elastic properties accommodate the substrate’s normal expansion and contraction.
  • Quick to apply, with no cure time, it allows for immediate backfill.
  • It provides uniform factory-controlled thickness, not typically found with field-applied liquid coatings.
  • RD-6®’s woven construction of the geotextile backing allows contact throughout the overlaps to create stronger adhesion to critical areas of the coating


POLYGUARD 600 LIQUID ADHESIVE consists of a polymer base in a solvent. Using a roller or brush, It applies easily to a clean, dry pipe service. The fast-drying primer works in conjunction with Polyguard pipeline coatings and tapes. For VOC-free applications, we offer the 601 ZERO VOC LIQUID ADHESIVE


We strongly recommend applying POLYGUARD SP-6™ OUTERWRAP over the RD-6® COATING for pipe diameters greater than 4-inches. It consists of a strong, non-woven, felt-like polypropylene fabric. The outerwrap provides an inexpensive, non-shielding layer with high-tensile and low-elongation properties, to further reduce damage caused by soil stress.

The Importance of High-Quality Industrial Coatings Such as the POLYGUARD RD-6® COATING SYSTEM

The high-performing POLYGUARD RD-6® COATING SYSTEM provides a long-term, cost-effective solution to protecting your equipment’s reliability, which is critical to maintaining your facility’s performance and profitability. Applying Polyguard coating products will increase the service life of your equipment and infrastructure to prevent severe damage and costly shutdowns. 


Polyguard professionals can help you understand the different types of industrial coatings and why choosing Polyguard’s high-quality industrial coating system will provide the best protection of your costly equipment and structure. Contact Polyguard professionals today to receive the best quote on coating products.

What is Hydrostatic Pressure?

What Is Hydrostatic Pressure?

When it comes to building science, hydrostatic pressure plays a vital role in designing and constructing any structure, particularly regarding the waterproofing systems for below-grade walls. You can simply define hydrostatic pressure as resting water exerting a load on an adjacent solid entity, like a concrete foundation wall. The consequences of hydrostatic water pressure on unprotected below-grade walls can lead to significant structural damage, unhealthy mold, and pest (carpenter ants and termites) infestation. 

Fortunately, Poly Wall® Building Solutions (a division of Polyguard) offers durable, flexible, temperature, pest, and chemical-resistant foundation waterproofing products that can protect against hydrostatic pressure. Hydrostatic pressure protection will limit moisture infiltration and significantly contribute to a home’s or building’s long-term integrity, safety, and health.

What is Hydrostatic Pressure?

What is a straightforward hydrostatic pressure definition? Hydrostatic pressure occurs when gravity pushes stagnant-dense (static) water (hydro) against below-grade walls built partially or entirely below the water table or on a hillside. Hydrostatic pressure increases with depth and soil wetness. 

What is Hydrostatic Water Pressure?

Rising groundwater creates hydrostatic pressure on foundation walls, causing moisture to infiltrate through cracks and joints and permeate solid concrete through capillary action (wicking). Capillary action refers to water’s ability to flow into narrow channels between porous building products, like concrete, acting like tubes due to adhesive and cohesive forces interacting between the liquid and the surface, without the assistance of gravity. 

Hydrostatic water pressure will intensify in areas with naturally high soil saturation levels, like those near ponds or creeks. Eventually, the water will accumulate to the point that it will exert hydrostatic pressure on the foundation walls. 

What is Hydrostatic Pressure in Concrete?

Hydrostatic pressure on concrete will force water into any crack, gap, or imperfection in the concrete foundation, adding loads to the structural elements of the building. A basement can crack or break a concrete below-grade wall, flood a basement, and cause costly and long-term structural damage to the home or building. 

Polyguard Provides Hydrostatic Pressure Solutions 

Now that you understand what causes hydrostatic pressure, what are some hydrostatic pressure solutions?

A secure, strong foundation requires a waterproofing system to withstand hydrostatic pressure for the structure’s lifetime, preventing moisture infiltration into the wall system by hydrostatic pressure and capillary action. Moisture infiltration into a below-grade wall will weaken the foundation, create a musty smell, and cause the walls to bow inward and crack. 

The ASTM mandates that a waterproofing membrane should resist damaging chemicals and root growth, maintaining its watertight integrity for the structure’s life in a constant or sporadic moist environment against continuous or intermittent hydrostatic pressure. Therefore, the building’s design must include high-quality, below-grade waterproofing products, like Poly Wall Building Solutions, to avoid moisture infiltration due to hydrostatic pressure.

Underseal® Underslab Membrane

Underseal® Underslab Membrane

Underseal® Underslab Membrane provides a tough, 85-mill pre-concrete pour horizontally or vertically applied waterproofing membrane that can eliminate vapor and water transmission through concrete slabs on grade. A solid mechanical bond forms between the concrete and membrane during the concrete pour, creating a puncture-resistant product with superior adhesive bonding and protection against cracking and water migration.

Commercial Stretch Fluid-Applied Waterproofing

Commercial Stretch Fluid-Applied Waterproofing

Polyguard’s Commercial Stretch protects against hydrostatic pressure on cracks, poured masonry, and poured cement. It is a fluid-applied single component developed with our patented thermoplastic technology. It provides a spray, cold-applied (as cold as -20° F) material with a durable, seamless, waterproofing membrane that can bridge substrate shrinkage cracks up to 1/16-inch, reducing surface breaches and stopping problems at the joints. We designed Commercial Stretch for quick installation to below-grade exterior waterproofing of precast concrete, concrete CMU foundations, and other structural substrate surfaces on the hydro-positive side.

Fluid-Applied Damp Proofing PRO 1000

The design of PRO 1000 permits positive-side hydrostatic pressure installation over below-grade poured precast concrete, concrete, and concrete masonry walls. You can also apply PRO 1000 as a negative-side, vapor impermeable coating on the inside of a below-grade wall in combination with damp or waterproofing the exterior of the wall with PRO 1000 or other Polyguard material. 

POLYFLOW® 10, 10P, 15, 15P and Totalflow™ System Below-Grade Drainage Solutions

POLYFLOW® 10, 10P, 15, 15P and Totalflow™ System Below-Grade Drainage Solutions

Polyflow® 10, 10P, 15, and 15P Sheet Molded Drainage Mats, applied over Polyguard waterproofing membranes, provide below-grade relief of hydrostatic pressure over foundation, retaining, and planter walls when connected to a passive gravity drain or operational sumps, like our Totalflow™ high capacity collector and outlet drainage system.

You install the Totalflow™ system at the wall’s bottom, sitting at the top of the footing with the high-profile section of the drain at the bottom to allow high lateral water flow. You then attach Polyflow 10, 10P, 15, or 15P soil sheet drain above the Totalflow sheet drain for complete wall drainage. .

We manufacture Polyflow® 10, 10P, 15, & 15P Sheet Molded Drainage Mats with a geo-composite, covering one side of the formed impermeable polymeric core with a polymeric filter fabric. In addition, the Polyflow 10P & 15P also have a protective layer of polyester (PET) film, which adds durability, toughness, and chemical resistance. 

The fabric directs moisture into the drain core while limiting the movement of soil particles which can clog the core. The core allows the moisture to flow towards the Totalflow™ system, collecting the water, allowing for high-capacity water flow to designated drainage exits.

Polyguard PRO 3101 Moisture and Chemical Barrier

Resistant to hydrostatic head, UV rays, and extreme temperatures, PRO 3101 provides a single component, cold-applied, non-elastomeric, non-breathable thermoplastic that stops water and chemicals from moving through a substrate. Typical applications include swimming pool enclosures, concrete wastewater storage tanks, and car wash enclosures. In addition, for maximum protection against mold, we can add Proban® mold inhibitors at the factory.

Polyguard TERM® Underslab Water|Termite Barrier

Resistant to hydrostatic head, Polyguard TERM® provides protection against water and subterranean termites where the concrete slab rests on the soil, a most vulnerable part of a structure. Concrete slabs have cracks, joints, and water, and pests can penetrate. Installed adequately as part of the building envelope, Polyguard TERM® blocks both termites and water, without pesticides.   

Strong TERM® Underslab Water|Termite sheet Barrier includes an 8.5 mils high strength cross‐laminated polyethylene backing topped with a 69‐mil thick layer of TERM barrier sealant integrated into a non‐woven geotextile fabric. Polyguard TERM® has a factory-controlled thickness of 95 mils.

Stand Up to Hydrostatic Pressure with Polyguard Products

Designing your below-grade walls to withstand hydrostatic pressures requires the use of strong, high-quality products like Polyguard’s Commercial Stretch, PRO 1000,  Polyguard’s PRO 3101 Moisture and Chemical Barriers, Polyflow® 10, 10P, 15, & 15P Sheet Molded Drainage Mats, Totalflow™ drainage systems, and TERM® Underslab Water Termite Water and Insect Barriers. All these products will help protect your foundation from hydrostatic pressure that can lead to significant moisture and pest-related structural damage, along with unhealthy mold and mildew. 

Contact our Polyguard professionals for more on why the design of your foundation must include protections against hydrostatic pressure.

4 Effective Tunnel Waterproofing Methods

Tunnel Waterproofing Methods

Applying a quality tunnel waterproofing membrane to a concrete project, whether a massive underground highway or just a shallow utility tunnel, will protect the tunnel’s integrity during its lifespan, limiting repairs and maintenance that can interrupt service and threaten users’ safety. Failed tunnel waterproofing methods will allow water, soils, and chemicals infiltration leading to corrosion of the steel reinforcement and long-term damage. Failed waterproofing can cause ice buildup, which is a severe safety hazard. 

The choice of tunnel waterproofing membrane depends on the tunnel’s construction method, timetable, and job site conditions. However, the tunnel waterproofing method must also consider durability, sustainability, exposure, and stress conditions, along with ease of application and total cost.  

The effectiveness of a tunnel’s waterproofing system depends on the proper installation and compatibility of all the components, from the substrate to the drainage system. 

Read on for tips on how to successfully waterproof tunnels with Polyguard products, ensuring the integrity of the tunnel for its lifetime. 

4 Tips for Waterproofing Tunnels

1. Proper Surface Preparation

The quality of the concrete surface significantly affects the waterproofing system’s performance. Only a smooth, clean concrete surface will allow the prime coat to form a mechanical bond to the surface, ensuring continuous support of the waterproofing material and good adhesion between the membrane and the substrate. 

Good adhesion between the waterproofing membrane and concrete surface substrate will stop water migration and leakage in the presence of cracks or imperfections in the membrane or concrete surface. Water pressure acting on unsupported material may cause it to deform, extrude, and eventually rupture.

To ensure good bonding between the primer and substrate, you must properly prepare and clean substrate surfaces.

  • Remove by mechanical or chemical processes, scales, dust, mold, oil, curing agents, or any material that can affect the bonding of the waterproofing membrane to the substrate.
  • Grind surfaces down to a smooth surface, which ensures a tighter seal. 
  • Fill in all voids, gaps, or transition joints with Polyguard Detail Sealant PW™, an environmentally friendly, non-isocyanate adhesive/sealant. Tack-free in less than an hour, Detail Sealant PW cures in 24 hours at 75° F (24º C) and 50-percent relative humidity.

2. Prime the Substrate for Better Membrane Adhesion

Priming the concrete substrate with Polyguard® 650 LT Liquid Adhesive before applying the waterproofing member will improve the bonding between the substrate and membrane. Failure to prime will appreciably diminish the performance of the waterproofing system.  

Priming structural concrete, masonry, or wood surfaces with 650 LT Liquid rubber-based adhesive will ensure superior adhesion with the Polyguard® waterproofing membranes. You can apply temperature-tolerant  Polyguard® 650 LT Liquid Adhesive down to 25° F (-4° C).

3. Apply a High-Quality Waterproofing Membrane

Polyguard’s superior waterproofing membranes can stop water, contaminants, and mold from entering the structure, which helps maintain its integrity and lower maintenance and repair costs. Polyguard offers several high-performing waterproofing membranes to fit your project best: 650 Sheet Membrane, Polyguard 650L36 Sheet Membrane, and Underseal® PRM™.

650 Sheet Membrane (48″ x 50′ rolls) and 650L36 SHEET MEMBRANE (36″ x 66.7′)

650 Sheet Membrane (48″ x 50′ rolls) and 650L36 SHEET MEMBRANE (36″ x 66.7′)

Polyguard designed the 60 mils thick 650 and 650L36 Sheet Membranes especially for use on tunnels, along with foundation walls, plaza decks, parking garages, insulated concrete forms (ICFs), and other similar applications. Applied post-concrete, poured (positive side), either vertically or horizontally, this self-adhesive waterproofing membrane/vapor retarder virtually eliminates vapor and water transmission through concrete slabs. You can utilize the 650 membranes for a Dual Core System, capitalizing on the benefits of a fluid-applied and sheet-applied membrane in a single system.

Underseal® PRM™

Polyguard’s strong, self-adhering, 65-mil Underseal® PRM™ is a post-concrete pour sheet waterproofing membrane/vapor retarder with significant strength, double-thick, cross-laminated polyethylene backing laminated to a thick layer of rubberized asphalt compound. 

Tunnel Waterproofing Membrane

Underseal PRM™ adheres permanently and tightly to concrete, forming a continuous barrier against water and moisture infiltration. You can apply Underseal® PRM™horizontally and vertically for a Dual Core System that capitalizes on the advantages of a fluid-applied and sheet-applied membrane in one system. It was also specially formulated for temperatures down to 25° F (-4° C).

Underseal® CRM™ 

Underseal® CRM™ 

For tunnel walls requiring chemical resistance, 85-mil Underseal® CRM™ provides an excellent solution, proven to resist elevated amounts of soil, water, and vapor contaminants. 

Fortified, pre-applied Underseal® CRM™ sheet membrane includes a multi-component, chemical resistant backing laminated to a  layer of waterproofing adhesive compound and an integrated strong, nonwoven geotextile fabric. Applied horizontally, Underseal® CRM™ creates a continuous seal underneath the concrete slab or behind vertical “blind-side” cast-in-place concrete tunnel walls. 

Ultra CRM™ 

Post-applied, 60-mil Ultra CRM™ is a high-strength sheet membrane with multi-component, chemical resistant backing laminated to a thick layer of waterproofing adhesive compound, capable of resisting high concentrations of soil, fluid, and vapor contaminants. We designed the Ultra CRM™ for tunnels, poured concrete foundation walls, parking garages, etc., needing chemical-resistant waterproofing.

4. The Need for a Drainage System

A drainage component to a tunnel’s waterproofing system will collect and dispose of water before it damages the structure. The Polyflow 10/10P/15/15P Sheet Molded Drainage design establishes predetermined pathways for below-grade water management, allowing water to pass into the drain core while restricting the movement of soil particles that can clog the core. In addition, Polyflow 10/10P/15/15P Sheet Molded Drainage provides a protective layer for Polyguard waterproofing membranes. However, you must limit their exposure to ultraviolet light. 

Why Choose Polyguard Products for Tunnel Waterproofing?

Building a durable, long-lasting tunnel requires proper waterproofing system application, including substrate preparation, priming, waterproofing membrane, and drainage system. Fortunately, Polyguard has superior products to fit all these vital requirements. 

In 2011, the Houston Country Club chose Polyguard waterproofing systems to protect the integrity of various tunnels they constructed to connect their new underground 400 vehicle parking garage (also waterproofed with Polyguard products) to their elevator room in the clubhouse. They choose our high-quality products to limit the tunnels and garages repairs and maintenance due to water inflation and protect their vehicles and members’ safety.  

Contact Polyguard professionals today for more tips on waterproofing tunnels.

3 Considerations for Waterproofing a Parking Garage

Parking Garage Waterproofing

Properly installed and maintained waterproofing membranes for a parking garage deck will minimize maintenance and repair costs and extend its service life.

Modern methods of parking garage waterproofing better understand deterioration mechanisms. Specifically, the long-term performance of a parking garage depends on the effectiveness of the waterproof barriers in preventing moisture and chemical contamination and managing the salt-laden water entering the structure.

Proper installation and maintenance of a parking garage waterproofing system will slow its rate of deterioration and ensure safe, uninterrupted, long-term use of the structure. Protecting a parking garage with high-quality waterproofing will also limit closures, reduce long-term capital expenditure costs, and maintain its initial value. Conversely, a lack of adequate waterproofing often results in costly structural repairs, loss of revenue to extensive closures, and damage to vehicles.

A properly installed and well-maintained high-quality waterproofing system, like those offered by Poly Wall® Building Solutions (a division of Polyguard) for a parking garage, provides the front line defense against damaging moisture, chemicals, and salt-infused water.

Three Considerations for Waterproofing a Parking Garage

Preventing water intrusion in a new parking garage demands detailed, professional design instructions, like from our waterproofing specialists at Polyguard. Our team can help you avoid critical waterproofing design mistakes, particularly when it comes to terminations, transitions, and penetrations during construction, which can lead to time delays, budget overages, and even court. We also suggest that general contractors assign responsibility to a single person for the critical systems that impact waterproofing, like the building envelope, HVAC, etc., instead of relying on each building specialist to ensure their tasks meet an adequate level of waterproofing.

1. A Robust Waterproofing Design

The waterproofing system for a parking garage must withstand an aggressive environment, with heavy wear and tear from cars, trucks, and other vehicles. A poorly designed waterproofing system for a parking garage will quickly deteriorate, allowing moisture and chloride to enter the structures.

An effective waterproofing system must bridge cracks that will open and close as the temperature changes, along with cyclical loading as the structure ages. If the system stops bridging cracks, it becomes an easy path for moisture and chlorides to evade a surface-applied waterproofing system.

2. Sealing Joints in Precast Parking Structures

To maximize a precast concrete parking garage’s lifespan and avoid significant maintenance and repair costs, you must adequately engineer and install joint sealants between the precast concrete members.

Ensuring the good design, installation, and leak-free, long-term performance of sealed joints in precast concrete parking structures requires collaboration and coordination between building specialists: architect, precast concrete contractor, welder, concrete finisher, and sealant specialist. Designing sealing joints should consider expected joint movement, sealant material, and joint configuration. For more information on joint design, you can reference ASTM C11931 and ASTM C12992.

Choosing a Quality Sealant for Joints

The sealant must adhere to clean concrete, accept the movement of the joint, and withstand environmental conditions. The market offers single and multiple-component products. 

The physical demands on a parking garage sealant require a primer as an extra layer of protection against unplanned conditions, like ponding water or long-term snow cover, chemical exposure, and some forms of surface contamination. In addition, the design of parking structure joints should accept sealants capable of ±25% movement. However, some sealants can take 100% extension and 50% compression. Designing to the lower movement standard will leave room for error. 

To combat mechanical forces on the sealants from cars, trucks, etc., you must recess the sealant from the surface of the concrete at the drive lanes and ramps. Finally, the sealant must withstand heavy heat and UV (ultraviolet) rays in warm climates like Texas and Florida. In Michigan and Maine’s extreme cold and snow, the sealant must withstand extreme cold and snow, plus the abrasion of sand and salt used on the deck. 

3. Provide Proper Drainage to the Parking Deck

Draining water away from the parking garage will protect the deck, waterproofing membrane, and concrete slab, all vital to the structure’s service life. Extensive damage will occur if water left pooled in the structure freezes and thaws in colder climates. Therefore, waterproofing for a parking garage must include a drainage system that will direct water away from the structure. In addition, the deck must slope at least 2 percent towards a drainage system. 

Polyguard Pavement Waterproofing Membranes for Parking Garages

Polyguard Pavement Waterproofing Membranes for Parking Garages

In most states, the Department of Transportation recognizes the use of Polyguard Pavement membranes to protect bridge decks or pavement bases from water and moisture. They contain a rubberized asphalt waterproofing adhesive laminated to polypropylene fabric backings. We applied a disposable silicone-treated release sheet to the laminated membrane to prevent the membrane from sticking onto itself while in the roll. Only use Polyguard Membranes at pavement and air temperatures of 40 ºF and higher.

Polyguard offers several waterproofing membranes and companion products for bridge decks and parking garages:

Durable and Tough 665 Waterproofing Membrane

Self-adhering, 665 Waterproofing Membrane consists of rubberized asphalt laminated to a woven solid polypropylene mesh backing to form a minimum 65 mil membrane. 

Durable and flexible 665 Waterproofing Membrane, with a perm of 0.05, provides long-term waterproofing protection by maintaining its integrity against traffic and environmental attacks. 665 Waterproofing Membrane provides:

  • Puncture resistant up to 200 lbs.
  • Strip Tensile Strength of 50 lbs./in. Width
  • Grab Tensile Strength 150 lbs.
  • 20% Elongation at break of fabric
  • Pliability at low temperatures

You can cold-apply with no special adhesives or heating equipment, the 4-foot wide, 50-feet long membrane, delivered on a silicon release for ease of application. Projects suitable for 665 Waterproofing Membranes do not exceed an overlay temperature of 325°F.

In addition, we recommend an application of 650 RC Liquid Adhesive before applying the membrane to concrete bridge decks or milled pavement surfaces. Between temperatures 40º F and 50º F, new asphalt pavement surfaces do not need adhesive. Therefore, only use liquid adhesive for old concrete or asphalt surfaces (except milled surfaces) for temperatures below 70º F.

650 RC Liquid Adhesive

Polyguard 650 RC Liquid Adhesive is an asphaltic solvent-based liquid adhesive primer below waterproofing membranes for parking garages that enhances the bond between the membrane and pavement. Easy to apply, 650 RC Liquid Adhesive meets the requirements of ASTM D-41.

Solid and Flexible 650 Sheet Membrane

Strong, flexible, 60-mil, post concrete pour 650 Sheet waterproofing/vapor retarder membrane virtually eliminates water and vapor transmission through a parking garage’s concrete slabs. Self-adhered and cold-applied 650 Membrane allows for application down to 25° F (-4° C).

Polyguard 650 Membrane comes in a wide membrane, allowing for quick and straightforward application to continuous flat surfaces, like a parking deck. However, it also comes in a narrow width for trimming corners, construction joints, and other applications. 

You can purchase 650 Sheet Membrane in sizes: 36″ x 66.7′ and 48″ x 50′ rolls.

Reduce Cracking and Corrosion with NW-75 Pavement Underseal Membrane

Reduce Cracking and Corrosion with NW-75 Pavement Underseal Membrane

Peel and stick Polyguard NW-75 provides the ideal waterproofing solutions for localized areas of failure in parking lots (less than 10 percent of pavement area) before paving with a new overlay. Weaknesses in the subgrade can cause the asphalt to crack, allowing water to enter the subgrade, accelerating the failure, and creating a bad spot in the pavement, which is a situation that often repeats itself even after digging out and repairing the area.  Pavement Waterproofing Underseal can help stop future pavement failure by reducing the extent and severity of reflective cracking. 

NW-75 performs two functions. It provides reinforcement against breakup and cracking. If a crack occurs, the waterproofing seal built into the NW-75 stops water infiltration.

Underseal Polyguard Undeslab - Parking Garage Waterproofing

Puncture-resistant, NW-75 Polyguard 65 mil underseal membranes provide a permanent seal underneath the pavement, reducing the severity of pavement cracking and preventing steel corrosion on decks. It is also an excellent solution for joint and cracks repair.

Polyflow® 18 Drainage Mat

The design of our high-capacity Polyflow® 18 Drainage Mat provides a solution to lightweight drainage compatible with our engineered sheet and liquid membrane products used for parking garages. 

Lightweight and easy to install, Polyflow® 18 drainage mat contains a compressive strength of 21,000 psf, capable of handling the most challenging horizontal applications like a parking deck, split slabs, and plazas. In addition, this product utilizes a woven filter fabric designed for concrete pours to allow flow under loaded conditions.

Home Stretch™ Liquid Waterproofing

Home Stretch™ Liquid Waterproofing

Home Stretch™ Liquid Waterproofing provides waterproofing for below-grade precast concrete, concrete, and other vertical foundation surfaces prone to hydrostatic pressure. Its solvent-based, elastomeric coating cures to form a durable waterproofing membrane capable of bridging cracks up to 1/16th of an inch. For complete garage wall waterproofing, Poly Wall advises using Home Stretch™ Liquid Waterproofing with Blue Barrier™ Joint Filler 2200, Arroyo™ Drain Board, Arroyo™ Outlet ChannelArroyo™ End Outlet Channel System, and Arroyo™ T Outlet.

Trusted Reliability of Polyguard Waterproofing Products

Trusted Reliability of Polyguard Waterproofing Products

The Alta Dadeland project in Miami, FL, includes 431 residential units, 2,000 square feet of retail space, and a six-story parking garage protected with Polyguard waterproofing products.

For nearly 50 years, Polyguard’s Highway Division waterproofing products have protected the integrity of parking garages, saving on expensive repairs and maintenance. Correctly installed and maintained, our durable, strong, and flexible products protect against water and moisture intrusion, particularly around the joints, and reduce the amount and severity of cracking. As a result, Polyguard waterproofing products minimize maintenance and repair costs and preserve the structure’s integrity for years to come. 

Polyguard waterproofing products

The 16-story Museum Towers II in Philadelphia includes an on-site parking garage featuring Polyguard waterproofing products.

For more information on waterproofing a parking garage, don’t hesitate to contact our professionals at Polyguard.

Below-Grade Waterproofing and Drainage Solutions: Everything You Need to Know

Why Use Below-Grade Waterproofing?

Why Use Below-Grade Waterproofing?

Below-grade foundation waterproofing systems provide several components vital to managing the integrity and health of your building and controlling repair and maintenance expenses due to moisture infiltration. 

You need below-grade waterproofing and foundation drainage board solutions for below-grade walls because porous concrete can crack from water pressure and the building settling, allowing groundwater or contaminated soil vapors to enter the structure. Placing a barrier between the concrete and surrounding earth will protect the integrity of your foundation and avoid costly repairs and maintenance.

Stopping water and harmful contaminants from entering the building requires a high-quality, below-grade waterproofing membrane and drain board waterproofing, like Polyguard below-grade waterproofing and drainage board for foundation walls

The Benefits Of A Below-Grade Waterproofing System

There are several significant benefits to applying below-grade waterproofing and an effective basement waterproofing drain board to a foundation wall. Specifically, below-grade foundation waterproofing and foundation waterproofing drainage boards keep the below-grade building envelope moisture-free, protecting the structure’s integrity, immensely lessening long-term maintenance and repair costs, and helping to avoid the following below-grade moisture-related problems: 

  • Cracks in walls
  • Crystalline deposit of salts (efflorescence) on a basement or crawlspace walls or floor
  • Humidity in the crawlspace or basement leads to unhealthy and structurally damaging mold
  • Strange and unpleasant smells in the basement or crawlspace
  • Inward or outward bowing walls

The Science Of Below-Grade Waterproofing

The ASTM mandates that a waterproofing membrane should resist chemicals that can harm the membrane and maintain its watertight integrity for the life of the building in a continuously or intermittently moist environment against continuous or intermittent hydrostatic pressure. You should also consider wicking to maximize the water-resistance of your below-grade wall. 

Hydrostatic Pressure

Hydrostatic pressure refers to the gravitational pull on standing-dense water, causing it to push against below-grade walls built entirely or partially below the water table or on a hillside. Hydrostatic pressure tends to force water into any crack or imperfection in the structure, making waterproofing more complicated and adding loads to the structural components of the building. Hydrostatic pressure can crack a foundation, flood a basement or crawlspace, and cause significant structural damage to the structure. 

Capillary Action

Unfortunately, the concrete of a well-constructed below-grade wall can dry out unevenly, forming microscopic air tubes that allow water to seep through and into the structure by capillary action. 

Capillary action (wicking) refers to water’s ability to flow into narrow channels between porous building materials (concrete, aggregates, and sand) that act like tubes due to adhesive and cohesive forces interacting between the liquid and the surface, not with the assistance of gravity. Wicking results in a ring of dampness at a building’s base, including the lateral walls. Capillary water often carries salts and minerals (sulfates, chlorides, ammonium compounds) from the subsoil that can react with the building materials of the foundation, which can weaken the structure’s integrity, 

Stopping Water Infiltrations To Below-Grade Walls

The most effective way to stop water infiltration to below-grade walls by hydrostatic pressure and capillary action involves an application of an impermeable membrane and drain board foundation waterproofing between the soil and structure. 

Types Of Below-Grade Waterproofing Membranes

The two main membrane systems for waterproofing below-grade walls include prefabricated sheet membrane systems and fluid-applied membrane systems.

Prefabricated Sheet Membrane Systems 

Typically come as bentonite, modified bitumen, elastomeric, or thermoplastic membranes. You can easily apply prefabricated membranes (modified bitumen, elastomeric or thermoplastic sheets) to surfaces.

Fluid-Applied Membrane Systems 

Include cold liquid-applied, hot liquid-applied, or single components. You can, cold or hot, apply liquid-applied waterproofing to prepared substrate surfaces.

Applying Below-Grade Waterproofing

There are three processes for applying waterproofing membranes: positive-side, blind-side, and negative-side waterproofing.

Positive-Side (post-applied) Waterproofing 

Occurs after building the wall and requires access to the outside face of the building.


Pre-applied on the outside face of the foundation before building the foundation wall.. 

Negative-Side waterproofing membranes 

Involve applying waterproofing materials to the interior (dry) side of a building. Typically only done when you can’t apply positive side or blind-side waterproofing.

Why Polyguard Is The Best Below-Grade Waterproofing

Why Polyguard Is The Best Below-Grade Waterproofing

Polyguard’s below-grade foundation waterproofing products include membranes for pre-applied and post-applied applications, including sheet and fluid applied products. The design of our products stands up to the harshest of conditions, protecting concrete slabs and foundation walls from the entry of water and contaminants due to cracks in the concrete. 

Polyguard Below-Grade Sheet Membranes


Tough, 85-mil Underseal® Underslab Membrane waterproofing membrane/vapor barrier 

installs horizontally over prepared sub-bases such as compacted soil, mud slab, carton forms, or #57 Stone, eliminating water and vapor transmission through concrete slabs. During the concrete pour, the concrete intermingles with the fibers of the nonwoven geotextile, forming a strong mechanical bond with the membrane, protecting the floor finishes and indoor air quality by acting as a barrier to methane and radon gas. 

You can also install Underseal® Underslab Membrane vertically on removable formwork for waterproof protection for perimeter and grade beam installations, elevator pits, or against adjoining buildings to provide waterproofing protection. 



Typically, you apply puncture-resistant, flexible, 73 mil Underseal® Blindside™ Membrane waterproofing membrane in areas where soil retention does not allow access to the positive side. It installs vertically before pouring the concrete. As the concrete cures, it forms a mechanical bond with the membrane. In addition, the cold flow tendencies of the membrane create an outside adhesive layer, contributing to a tight seal and superior protection against moisture intrusion, along with methane and radon gas to the concrete.  

Also, you can install the Underseal Blindside™ Membrane horizontally over prepared sub-base such as mud slab, carton forms, fine crushed beds/pea gravel, or Polyguard approved drain board.



Strong, flexible, 60-mil 650 Sheet self-adhesive waterproofing membrane/vapor retarder stops water and vapor transmissions through poured concrete foundation walls, wood, CMU, and insulated concrete forms (ICF). For critical waterproofing projects, the design of 650 Membranes allows for use in horizontal/split slab applications and vertical/secure wall applications.

The Polyguard 650 Membrane comes in a wide membrane (up to 48- inches), allowing for quick and easy application to continuous flat surfaces. It also comes in a narrow width for trimming corners, construction joints, and other applications. 

UNDERSEAL ® PRM™ Puncture Resistant MEMBRANE

High-strength, self-healing, 65-mil Underseal® PRM™ is a post-concrete pour sheet waterproofing membrane/vapor retarder with a double-thick, cross-laminated polyethylene backing laminated to a thick layer of rubberized asphalt compound.  

Underseal® PRM™ adheres tightly and permanently to concrete. It’s backing also forms a continuous barrier to water and moisture vapor entry. 

You can apply Underseal® PRM™ vertically to the exterior sides of concrete foundation walls, tunnels, and related applications needing waterproofing, allowing for faster waterproofing applications by eliminating the step to install an additional protection course before backfilling operations.

You can also apply Underseal® PRM™  to horizontal slab applications such as parking garages, plaza decks, plywood decks, and similar applications. It allows for concrete topping slab installation without the need for a separate protection course in most situations.

Polyguard Chemical Resistant Membranes


For walls requiring additional chemical resistance, 85-mil Underseal® CRM™ provides a superior solution, proven to withstand elevated concentrations of water, soil, and vapor contaminants. 

Fortified, pre-applied Underseal® CRM™ sheet membrane contains a multi-component, chemical resistant backing laminated to a superior layer of waterproofing adhesive compound and an integrated high strength, nonwoven geotextile fabric. Applied horizontally, Underseal® CRM™ provides a continuous seal underneath the concrete slab or behind vertical “blind-side” cast-in-place concrete walls. 


Post-applied, 60-mil Ultra CRM™ offers a strong sheet membrane with multi-component, chemical resistant backing laminated to a thick layer of waterproofing adhesive compound, capable of withstanding elevated concentrations of fluid, soil, and vapor contaminants. We designed the Ultra CRM™ for poured concrete foundation walls, tunnels, parking garages, etc., requiring chemical-resistant waterproofing.



Polyguard’s Commercial Stretch is a fluid-applied single component developed with our patented thermoplastic technology. It provides a spray, cold-applied (as cold as -20° F) product which produces a seamless, durable, waterproofing membrane that can bridge substrate shrinkage cracks up to 1/16-inch, minimizing surface breaches and eliminating problems at the joints. We designed Commercial Stretch for simple application to below-grade exterior waterproofing of concrete, precast concrete, CMU foundations, and other structural surfaces on the hydro-positive side.


The design of PRO 1000 allows for positive-side hydrostatic pressure application over below-grade poured concrete, precast concrete, and concrete masonry walls. You can also apply PRO 1000 as a negative-side, vapor impermeable coating on the inside of a below-grade wall in combination with water or damp proofing the outside of the wall with PRO 1000 or other Polyguard material. 

The patented, single-component, cold-applied PRO 1000 creates a non-elastomeric, non-breathable, thermoplastic membrane. The membrane dries to a UV-resistant, tough, recoatable, hard-coat, protective film that prevents water passage through a substrate, protecting against rain, melting snow, and in the areas between the exterior finish and the grade. 

Why Polyguard Has The Best Drainage Options

Why Polyguard Has The Best Drainage Options

The design of our lightweight, high-capacity Polyflow® Drainage products provide our customers a variety of solutions to lightweight drainage, compatible with our engineered sheet and liquid membrane products. In addition, our easy-to-install products decrease excavation needs, saving both money and time.

Polyflow® 10, 10P, 15, and 15P SHEET MOLDED DRAINAGE MATS

Polyflow® 10, 10P, 15, and 15P Sheet Molded Drainage Mats, applied vertically over Polyguard waterproofing membranes, direct moisture into the drain core while limiting the movement of soil particles which can clog the core. Our Polyflow® 10, 10P, 15, & 15P drainage mats can minimize hydrostatic pressure when connected to our high capacity collector and outlet drainage system, Totalflow™.

Polyflow® 18 DRAINAGE MAT

The design of our high-capacity Polyflow® 18 offers a lightweight drainage system compatible with our engineered liquid and sheet membrane products used for below-grade waterproofing. 

Lightweight and easy to install, Polyflow® 18 drainage mat provides a compressive strength of 21,000 psf, capable of handling the most complex horizontal applications. In addition, this product uses a woven filter fabric specifically for concrete pours to permit flow under loaded conditions.

The Houston Country Club Underground Garage Polyguard Case Study

In 2011, the Houston Country Club began designing (Houston architect Jackson & Ryan) for their new underground garage to accommodate about 400 vehicles (170,000 ft2 plus tunnel areas at the cost of $10.5 million. It would also allow tunnel access to the clubhouse and social venues of the club. The club selected Pepper Lawson Construction, L.P. of Houston as the general contractor and Western Waterproofing Company of America in Houston as the waterproof contractor for the new underground garage. Price Consulting, Inc of Houston, however, provided the specification and details for the waterproofing. In addition, they chose Polyguard Products to ensure a waterproof below-grade wall for the new underground garage. 

After the excavation, contractors installed and compacted the drainage stone, which they covered with Polyguard’s Underslab Membrane. Next, they waterproofed the column areas with pre-formed column boots (saving significant time), and the exterior wall areas with Polyguard 650 Membrane System and PolyFlow 15P drainage composite. 

Finally, they waterproofed the post-tensioned garage lid with Polyguard’s 650 Membrane System and 1/4” Asphaltic Hardboard. In addition, Western Waterproofing installed Poly Flow 18H drainage composite to the perimeter vertical walls.  

Why Choose Polyguard Below-Grade Waterproofing And Drainage Solutions? 

The quality of a foundation plays a significant role in a building’s performance and lifespan. Severe problems to a building’s integrity will occur if you inadequately design and install the foundation, particularly the below-grade waterproofing and drainage systems. To avoid costly repairs due to below-grade leaks, always select high-quality below-grade waterproofing and drainage solutions like Polyguard products. 

Don’t hesitate to contact a Polyguard professional for all your questions concerning below-grade waterproofing and drainage solutions.

How to Prevent Corrosion Under Insulation (CUI)

(CUI) Corrosion Under Insulation

Corrosion under insulation (CUI) can trigger catastrophic failures and massive maintenance costs. CUI corrosion affects many industries, and it challenges oil, gas, and petrochemicals tremendously, because they must use insulation to save energy, protect workers from high temperatures, and control process temperatures.

Annually, corrosion costs about $2.2 trillion, over 3 percent of the world’s GDP, with about $1 trillion attributed to the oil, gas, and petrochemical industries. Furthermore, CUI causes 40 to 60 percent of pipe maintenance costs, resulting in 10 percent of these industries’ annual maintenance costs going to repairing damage caused by CUI. 

Corrosion can dangerously impact many industries besides oil, gas, and petrochemicals: 

  • Buildings and bridges can collapse
  • Bathrooms can flood
  • Chemical plants leak
  • Corroded medical implants can lead to blood poisoning
  • Corroded electrical contacts can lead to fires
  • Radioactive waste containers may leak

What is Corrosion? 

Damaging and costly galvanic corrosion occurs when water (a common corrosive electrolyte) combines with oxygen on two metal surfaces, like a pipe, prompting an electrochemical process or electrical connection between the metals spots. 

  • At this point, the less noble metal surface forms an anode. The anode loses electrons (forming a cation), causing the area to corrode (oxidize), producing distinctive red iron oxide (rust). Exposure to warm temperatures, salts, and acids can accelerate the process of corrosion. 
  • The more noble metal surface, with greater oxidation resistance, forms a cathode. The cathode acquires electrons (forming an anion), slowing corrosion (oxidation). 

What is Corrosion Under Insulation (CUI)?

Corrosion under insulation can attack the jacketing, insulation hardware, or the underlying piping or equipment when moisture gets in or under the insulation system, regardless of the type of Insulation or its use (thermal or acoustic). 

The oil and gas sector’s extensive use of steel pipework makes these industries particularly susceptible to CUI. In addition, the locations of many of these industries, in hot, humid, high rainfall environments, along with operating systems that create large temperature swings, further make the oil and gas sector susceptible to CUIs. 

What Triggers CUI Corrosion?

What Triggers CUIs?

The steel type and coating, the number of corrosive contaminants (atmospheric chlorides or sulfides or leaching from the Insulation) in the water, and the temperature of the pipework quickly can precipitate CUIs.

However, several other factors can influence the development of CUI.

  • Ambient temperatures: 
    • Below 32º F, corrosion rates drop due to low energy levels and limited amounts of oxygen.
    • Above 300º F, most moisture will evaporate out of the insulation, preventing corrosion.
    • Corrosion can occur on carbon steel between 32º F and 300º F.
    • Corrosion under stainless steel insulation can occur between 140º F and 300º F.
    • The most aggressive corrosion on carbon steel and 300 series stainless steel occurs between 200º F and 240º F. 
  • Liquid or vapor water from rainwater, condensation, spillage, etc.
  • Insulation material and system design
  • Condition and choice of the protective jacketing and vapor barriers
  • Intermittent wet and dry environmental conditions
  • Moisture trapped in the insulation due to improper storage or application not only leads to corrosion, but reduces its thermal and acoustic performance. 

If left undetected, CUI can cause catastrophic explosions or leaks, equipment failure, lengthy downtime due to replacement or repair, and environmental and safety concerns. 

How To Prevent Corrosion Under Insulation

Effective ways to limit CUI on pipes and equipment typically involve controlling the three essential ingredients required for CUI: warm temperatures, water, and oxygen. 

However, even when you completely enclose a pipe with insulation, sealing all the joints, terminations, and other regulations along the length of a pipe, moisture can still penetrate the insulating layers, causing CUI. Therefore, as part of your scheduled coatings maintenance plan, you must regularly check the piping under insulation, sealing the insulation with a top-quality, high-temperature CUI coating.

How to Stop CUI with Polyguard RG-2400 (Blue Goo) and Barriers

How to Stop CUI with Polyguard RG-2400 (Blue Goo) and Barriers

Fortunately, the team at Polyguard made the problem of CUI a top priority to solve, developing a corrosion protection gel, RG-2400 or Blue Goo, for a variety of the most problematic corrosion problems worldwide. You can apply RG-2400 gel to pipes and other metal surfaces with a brush or glove, sealing the insulation and stopping CUI.

Polyguard has created a family of RG-2400 products to meet your specific needs: 

  • RG-2400 ET – withstands 350° F (177° C) operating temperatures, vital for steam lines with temperature cycles ranging from hot to ambient 
  • RG-2400 LT – for use on any system up to 250º F (121º C), great for preventing CUI, piping systems, fittings, valves, tanks, and vessels
  • RG-2400® NP – for new piping systems valves, tanks, and vessels without oils, dirt, or rust, on any system up to 230º F
  • RG-2400 AK – prevents stainless steel and copper stress crack CUI, great for tank chime installations, used on in-service HOT Line applications up to 250º F (121º C)
  • RG-CHW – a CUI solution formulated for use on chilled water systems with 40º F – 140º F temperature ranges and minimal surface preparation before application 
  • RG-2401 – designed for oil well casings and road casing corrosion remediation, displacing water in wells with service up to 250º F (121º C)

Along with RG-2400, we strongly recommend our vapor barriers, such as Insulrap™, Alumaguard® Lite, and Alumaguard® on insulated pipes and structures. The Polyguard barriers provide damage-resistant protection to the insulation’s outside, keeping it drier than traditional coatings. Specifications for food and beverage processing and chemical processing plants with insulated piping usually require the application of Polyguard barriers over the insulation.

Polyguard’s Companion Products for RG-2400 

PolyGuard has several companion products to support and protect RG-2400 corrosion gel. 

  • GeoWrap® – a non-woven nylon geotextile fabric designed to support RG2400 on large diameter hot piping systems (up to 425º F (218º C) with a melting point of 500º F (260º C)) which tend to vibrate. It is also used for vessels and storage tanks. 
  • AlumaWrap™ – a waterproofing membrane used on uninsulated piping systems and vessels with corrosion problems, installed over the GeoWrap, its joints taped with Alumaguard® Lite smooth acrylic tape.
  • VaporGuard™ Butyl Tape – provides excellent cold temperature flexibility at -20º F and is designed to seal vapor stops, expansion joints, and terminations on ammonia systems, preventing moisture from infiltrating the insulation system.
  • Alumaguard® Lite – used outdoors to weather-proof exterior insulated ductwork, piping, or other insulated tanks, vessels, and equipment or indoors on ductwork and pipe systems requiring an actual zero-perm vapor barrier durable outer jacket.
    • Alumaguard® Lite Cool Wrap™ – offers an energy-saving flexible cladding that creates a superior vapor and weather barrier for all our Alumaguard® family of products. Alumaguard® Lite Cool Wrap™ qualifies for LEED credits and meets solar reflectance and emissivity requirements of the Cool Roof Rating Council and California Title 24. 
    • Alumaguard® Lite White – designed for indoors, zero-perm applications in mechanical rooms, food production areas, pipe systems, and ductwork when desiring a glossy white appearance. You can also use it outdoors to weather-proof exterior insulated piping, ductwork, or other insulated tanks, vessels, and equipment.
  • AccuTrowel – a custom-designed toolset to gauge mil thickness when applying viscous coatings to pipe surfaces measuring from 2 – 12-inches in diameter.

Preventing CUI with Polyguard Products

Preventing CUI with Polyguard Products

Polyguard’s RG-2400 products offer a solution to stopping and controlling CUI on new and existing metal services of insulated piping, ductwork, vessels, oil-well, and road casings. Preventing CUI protects workers from high temperatures, controls process temperatures, and saves energy. Significantly, not preventing CUI can lead to catastrophic failures and massive maintenance costs. 

PolyGuard professionals are here to answer all your questions on how to prevent corrosion under insulation.

The Best Options for Waterproofing a Balcony or Terrace

The aesthetics and performance of a building depend tremendously on adequate balcony waterproofing. Heavy rain may pool due to inadequate balcony waterproofing systems potentially leaking to the lower floor, causing cracks, chips, and unsafe joints and sealants. Therefore, the best-suited terrace waterproofing system pays particular attention to the critical leakage points of the balcony or terrace. 

Read on for more on waterproofing solutions for a terrace, emphasizing how to waterproof a balcony floor.

Balcony Waterproofing

Before You Waterproof a Terrace Flooring

In new construction, the best balcony flooring waterproof system includes a drainage membrane on the underside of the substrate. However, when remodeling, the specific conditions of the terrace or balcony determine the best solution for waterproofing a patio, balcony, veranda, or lanai floor. 

How to Choose the Best Waterproofing Solution for Existing Balconies

The best way for you to waterproof an existing balcony floor depends on the condition of the floor and substrate as well as adequate sloping. 

Before choosing your balcony waterproofing solution, first, check the flooring for cracks or holes. If present, remove the finished floor layer (usually wood, plastic, stone, or composite tiles) and check the substrate (typically wood or concrete) for damage. Make sure the balcony has a slope of at least 2 percent  (1/4 inch per foot) for positive drainage.

Waterproofing Floors and Substrates in Excellent Condition

For balcony floors without cracks or tenting, you can quickly and easily apply flooring-specific liquid membrane waterproofing to the finished floor with rollers or brushes. Following the manufacturer’s instructions, the process should leave no gaps, creating a thickness of just a few millimeters. The liquid membrane waterproofing solution you select should resist temperature changes, bad weather, chemical substances, and stagnant water.  

Waterproofing Damaged Finished Flooring or Substrate

Cracks, rust stains, salt stains, or discoloration on the flooring indicate problems with your terrace or balcony floor. When this occurs, you will need to completely remove the finished flooring, exposing the layer beneath the substrate — the last line of defense between the vital structural parts of the balcony floor and moisture.  

For concrete substrates, look for any cracks or chips, filling the ones you find. For large damaged pieces of the concrete substrate, use a concrete patcher with a trowel to apply and smooth the new concrete. Before applying the adhesive membrane, ensure a clean, dust-free, smooth, and dry substrate. 

How to Seal a Balcony Floor 

After repairing and cleaning the substrate, you can apply the waterproof terrace coating, followed by a primer (use a new paint roller). 

Best Option for Waterproofing a Terrace or Balcony Floor

Manufacturers typically offer two solutions for the best balcony waterproofing membrane: wet/liquid and rolled/sheet membranes. However, the success of terrace waterproofing work depends on following manufacturers’ instructions. 

Wet Waterproofing Membrane

Wet or liquid membranes are a cost-effective method of concrete balcony waterproofing. However, many find the application of liquid membranes complex and less effective at creating an even surface than rolled waterproofing membranes, so it may not be the best waterproofing chemical for a terrace. 

Why Rolled Waterproofing Membranes Are the Best Option for Waterproofing a Balcony

Rolled Waterproofing Membranes

Rolled or sheet membranes come in long, adhesive sheets you lay across the subfloor. They guarantee an even surface, acting as a layer of reinforcement for the subfloor. Rolled or sheet membranes type installs easier and faster than liquid membranes. Polyguard is a superior option to a rolled waterproofing membrane, Balconyguard™ Membrane, along with our high-performing companion products.

Balconyguard™ Membrane — The Best Rolled Waterproofing Membrane

Polyguard’s Balconyguard™ Membrane is a 60-mil, self-adhesive waterproofing membrane that is explicitly used on wood deck balconies and terraces, covered with lightweight concrete – ideal for multi-family construction or any project with a large number of balconies or patios.   

Easy to install, Balconyguard™ Membranes provide several impressive features and benefits specially designed for waterproofing balconies and exposed multi-story walkways covered with lightweight concrete:

  • Treated removable release film
  • High strength PET film
  • Tensile strength meets ASTM D412  
  • Elongation meets ASTM D412 
  • For ease of installation and detailing, our Balconyguard™ System includes custom corner boots, saving builders time and money. 
  • 48-inch wide by 50-feet rolls (200 ft2 rolls), reducing seam occurrence by up to 25 percent, compared to 36-inch wide products — a time-saving feature that lessens the number of required seams.

Before installing Balconyguard™ Membrane, we recommend you contact either Polyguard Technical Services or an authorized company representative for assistance for job-specific details or shop drawings. 

Guaranteeing a Waterproof Balcony and Terrace with Polyguard Companion Products

Waterproof Balcony and Terrace

In addition, Polyguard offers several convenient companion products to help ensure a water-tight balcony or terrace. 

Polyguard 105 Flashing Membranes

Polyguard 105 Flashing Membranes deflect water along with the exterior flashing application, including the sills, spandrel beams, copings, window and door headers, and flange flashings. Our 105 flashing provides:

  • A 105 mil
  • Strong, flexible, self-adhesive sheet
  • A high-density polyethylene film bonded to a layer of rubberized asphalt waterproofing compound with a slit release sheet to conform to 90-degree angles 
  • Accommodates most job site conditions without cracking, unlike some metal systems
  • Stands up to abuse by other trades during and after installation
  • Securely clings to the surface, eliminating blow-off and tears before and after exterior wall installation
  • Helps to self-seal a punctured membrane

Before applying Polyguard 105 Flashing Membranes, eliminate sharp protrusions and clean all surfaces of dirt, dust, and foreign matters. Next, prime the dry surfaces with 650 LT Liquid Adhesive, at an average rate of 250-300 ft2./gallon by brush or roller. After adhesive becomes tacky to the touch (30 to 60 minutes), apply the 105 Flashing Membranes to all areas requiring flashing to channel water away from walls. For extra protection, extend the vertical termination on substrate 6-inches and seal on the day of installation with Detail Sealant PW™. Finally, overlap all the flashings at least 2-inches, running them parallel to the direction of water flow. Prime the overlaps if temperatures are below 40º F (4º C). 

Polyguard 650 LT Liquid Adhesive

Polyguard’s rubber-based 650 LT Liquid Adhesive (in a solvent solution) primes structural concrete, masonry, or wood surfaces before applying waterproofing membranes, creating superior adhesion for the Polyguard® waterproofing membranes

  • You can use 650 LT Liquid Adhesive on applications down to 25° F (-4° C).
  • You must take precautions when applying 650 LT Liquid Adhesive to horizontal surfaces since it may remain tacky.
  • Concrete block and brick walls require 650 LT Liquid Adhesive.

Polyguard 650 WB Liquid Adhesive

Rubber- and water-based 650 WB Liquid Low-Tack Adhesive provides excellent adhesion. The VOC content of 5 g/L. 650 WB Liquid Adhesive appears pink. When used to prime dry surfaces, the 650 WB Liquid Adhesive ensures the dust-free substrate required for applying Polyguard Waterproofing Membranes.

  • Use 650 WB Liquid Adhesive to prime vertical and horizontal surfaces of structural concrete, masonry, or wood surfaces before applying Polyguard Membranes.
  • You can use 650 WB Liquid Adhesive in ambient temperatures and surface temperatures of 40° F (5° C) and above.
  • Do not freeze 650 WB Liquid Adhesive during transit, storage, or use.
  • Use 650 WB Liquid Adhesive on all concrete blocks and brick walls.

Polyguard Balconyguard™ Outside Corner Boot

The Balconyguard™ Outside Corner Boot (a 60-mil combination of rubberized asphalt and polyethylene) simply applies to the outside face of the balcony at the wall-balcony interface. Only apply Balconyguard Membrane or Underseal® PRM™ and 650 Sheet Membrane over the clean, dry, contaminate-free film of a Balconyguard™ Outside C. The 6-inch x 6-inch x 6-inch easy-to-install boots come 25 to a carton. Easy to install, the Balconyguard™ Outside Corner Boot saves time and labor on the job site. 

Polyguard Detail Sealant PW™

High-performing, flexible, non-corrosive, and non-staining Polyguard Detail Sealant PW™ fills minor cast concrete cracks, concrete masonry cracks, penetrations, gypsum sheathing joints, and gaps at head joints, creating a continuous smooth surface. You can apply Polyguard Detail Sealant PW™ to many below-grade waterproofing applications at penetrations and terminations, along with trowel-on rough opening flashing/waterproofing above-grade applications.

  • VOC/HAPS free, non-isocyanate adhesive/sealant, solvent-free Polyguard Detail Sealant PW™ is an eco-friendly solution to toxic silicone, urethane, and polyurethane sealants. 
  • Polyguard Detail Sealant PW™ comes in easy-to-use three-gallon pails or 20 oz. sausages.
  • Even at low temperatures, Polyguard Detail Sealant PW™ cures rapidly and retains its properties to -75°F. 

Polyguard Detail Tape

Apply the Polyguard Detail Tape as detail strips on the outside and inside corners, expansion joints, penetrations control joints, and cold joints to patch damaged areas of the membrane.

Strong, flexible, self-adhesive sheet Polyguard Detail Tape consists of a cross-laminated, high-density polyethylene film bonded to a layer of rubberized asphalt waterproofing compound. Wind the tape on a disposable silicone treated release sheet to stop the membrane from sticking to itself while in the roll. 

Polyguard LM-85 SSL

Polyguard LM-85 SSL is a two-component, semi-self leveling, asphalt modified, urethane liquid membrane that comes in a pourable sealer, and is specifically made to use in conjunction with Polyguard waterproofing membrane in Dual Core and pitch pan applications.

  • 100% Polyguard LM-85 SSL contains no solvents
  • Polyguard LM-85 SSL remains UV stable up to three months

Polyguard Polyflow® BD 

Polyguard Polyflow® BD (balcony drain) protection and drainage system provides drainage for foot-traffic balcony decks with less than 3-inches of concrete. Polyflow® BD comes as a sheet-molded drain, establishing pathways for balcony water management. The fabric permits water flow to designated drainage exits. In addition, the punched core increases the release rate of water from within the system. 

For horizontal deck installation, unroll Polyflow® BD fabric side up and loosely lay directly over the balcony waterproofing membrane, with the edges of the flanged core at the higher side of the deck or plaza, away from any drains.

Polyguard Polyflow® 18 Drainage Mat 

Polyguard Polyflow® 18 Drainage Mat includes a two-part, molded-sheet drainage geocomposite with a formed impermeable polymeric core, covered on one side with high-strength woven filter fabric. Lightweight and easy to install, Polyguard Polyflow® 18 Drainage Mat contributes to waterproofing by allowing water to pass through the fabric into the drain core while restricting the movement of soil particles that might clog the core. From the core, the water flows to designated drainage exits. As a result, Polyguard Polyflow® 18 Drainage Mat is an ideal drainage mat for split slabs, plazas, and parking decks. 

  • Polyguard Polyflow® 18 Drainage Mat provides enhanced compressive strength (21,000 PSF) of the core. 
  • Use Polyguard Polyflow® 18 Drainage Mat for horizontal applications

Installing the Polyguard Polyflow® 18 Drainage Mat 

After cleaning the horizontal substrate surface of dust and debris, unroll the Polyflow® 18 fabric side up and loosely lay directly over the waterproofing membrane, with the edges of the flanged core at the higher side of the deck or plaza, away from any drains. Next, attach the horizontal Polyflow 18 to the substrate surface with an adhesive compatible with the waterproofing membrane substrate. 

At the overlaps, place adjoining panels, so the core flange overlaps and shingles in the direction of flow to the drain collection system, daylight, or scuppers. Push adjoining panels together and shingle one fabric over another. For an under-slab installation condition, place the Polyflow® 18 fabric side down towards the soil.

Why You Need to Waterproof Your Balconies with Balconyguard™ Membrane 

Sufficient waterproofing of your balconies will help preserve the durability and aesthetics of your building, significantly lessening maintenance and repair bills over time. A leaky terrace can lead to long-term structural damage and unhealthy living conditions. Fortunately, Polygaurd’s Balconyguard™ Membrane and companion products can help you with your balcony waterproofing needs, securing your building’s value and integrity for years to come.  

For more questions on the best options for waterproofing a balcony or a terrace, don’t hesitate to contact Polyguards professionals today.