Blueskin Wthr Barrier 9Inx50ft Self-adhering membrane consisting of an SBS rubberized asphalt compound which is integrally laminated to a blue engineered film. The membrane is specifically designed to be self-adhered to a prepared substrate. SBS modified membrane can be applied in temp eratures as low as 10 F. Blue polypropylene film top surface and siliconized release film bottom surface. Excellent adhesion to prepared substrates of concrete, concrete block, primed steel, aluminum mill finish, anodized aluminum, galvanized metal, gypsu m board, and plywood. Impermeable to air, moisture vapor, and water. Peel and stick application; no flame required. Factory controlled thickness. .9mm thickness. Self-sealing when punctured.