Underseal® CRM™ is a strong, 85-mil, robust pre-applied membrane that has been designed and tested to withstand elevated concentrations of soil, water and vapor contaminants. When installed below the slab and behind vertical walls, Underseal® CRM™ creates a barrier preventing water & vapor from transmitting into the structure.
Underseal® CRM™ provides a continuous seal underneath the concrete slab and behind vertical “blindside” cast in place concrete walls. A strong mechanical bond is developed between the membrane and concrete at the time of pouring as the concrete intermingles with the fibers of the nonwoven geotextile fabric. Underseal® CRM™ is typically installed horizontally over a prepared subbase such as compacted soil, mud slab or #57 stone. It can also be used in vertical applications.