Black Silicone Caulk & Sealant, 100% Waterproof Silicone Caulking, Silicone Seal

Stays permanently flexible with a high-performing, durable seal and is suitable for application on typical non-porous construction materials such as glass, porcelain, and steel. Cut the main opening of the bottle, install the clog-free nozzle, then bevel the nozzle opening, push and squeeze out the silicone sealant from the tail and it can be used.