FLEX SEAL is a 100% R.T.V. silicone industrial-strength caulker and sealer. Its pressurized dispenser enables easy application in the toughest areas. FLEX SEAL remains permanently flexible at temperatures from -85°F to +500°F. It caulks around tubs, sinks, showers and plumbing fixtures and seals around windows, doors, tile, marble, etc. FLEX SEAL also bonds most materials, including glass, wood, metal, porcelain, rubber, plastic, marble and ceramics.