Features: * 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 temperatures 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, gypsum board, and plywood * Impermeable to air, moisture vapor, and water * Peel and stick application; no flame required * Factory controlled thickness * 0.9mm thickness * Self-sealing when punctured What"s In The Box: * Henry BH200-WB4578 6-In. X 50-Ft. Window and Door Flashing