Fluid Applied, Vapor Permeable Air and Water Barrier

GCP Applied Technologies (“GCP”) PERM-A-BARRIER VPL 50RS Membrane is a fluid applied, one component, STPE vapor permeable air and water barrier. When applied to approved construction surfaces, PERM-A-BARRIER VPL 50RS liquid is designed to cure and form a resilient, monolithic, fully bonded elastomeric sheet, and to create a continuous barrier against air infiltration and exfiltration, reducing associated energy loss and condensation problems.

PERM-A-BARRIER VPL 50RS Membrane is specifically designed to provide superior protection against the damaging effects of air and liquid water ingress on the building envelope. Vapor permeability allows the wall to breathe and dry, minimizing the risk of water vapor from being trapped and condensing within the wall. While PERM-A-BARRIER VPL 50RS Membrane is vapor permeable, it is impermeable to liquid water, allowing the material to act as a water drainage plain within the wall.