DESCRIPTION: SOPRAVAP’R is a self-adhesive membrane composed of SBS modified bitumen and a tri-laminated woven polyethylene facer. The underface is covered with a silicone release film. SOPRAVAP’R is used as a vapour barrier on insulated roof systems. The width of the membrane has been specifically determined to allow the membrane to fit with most structural steel decks. RECOMMENDED SUBSTRATE: SOPRAVAP’R can be installed on most substrates, such as steel, concrete, plywood, gypsum or cement boards, and asphaltic panels.