BUTYLSTRIP is a high-adhesive butyl sealing tape protected by a reinforced aluminum film. The aluminum film gives to the product resistance to ageing, to oxidizing and to the aggression of chemical and atmospheric agents. Complementary product to the breathable sheet Silvertek 15 Seal Lap for the hermetic sealing of joints in roof windows, skylights, chimneys and to the roof edges. Moreover it seals and joints various materials glass, steel, plexiglass, wood, polycarbonate and aluminum.