Perm-a-Barrier Flashing

GCP (formerly Grace) Perm-A-Barrier Wall Membrane is a self-adhesive, rubberized asphalt/polyethylene waterproofing membrane for air and vapor barrier applications. The 40 mil total thickness is a cold applied tape consisting of 32 mils of rubberized asphalt integrally bonded to a 8 mil high density, cross laminated polyethylene film.

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