CRC® Clear RTV (Room Temperature Vulcanizing) silicone adhesive is the simple way to seal, protect, bond, insulate and waterproof. Superb for forming instant, custom-shaped gaskets, Clear RTV Silicone adheres to most materials used in the industrial, electrical, metalworking and construction industries. Clear RTV Silicone forms a barely visible, watertight seal and is ideal for windows, joints, duct work and most electrical and cosmetic applications.