A self-adhering membrane consisting of an SBS rubberized asphalt compound which is integrally laminated to a blue-engineered film. 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; easy to install peel and stick application no flame required; thickness controlled at point of manufacture; membrane is self-sealing when penetrated with self-tapping screws or nails. Thickness: 25 mils.