Loctite Clear Silicone is a multipurpose adhesive and sealant which creates a permanent waterproof, protective seal that is ideal for metal, glass, rubber, tile and porcelain. Designed for indoor and outdoor use, Loctite Clear Silicone Waterproof Sealant can repair everything from electrical connections to seams on boots to stop leaks in wet weather as well as saltwater or freshwater aquariums. This all-season sealant creates durable, flexible bonds that resist extreme temperatures and impact and won't crack, peel, or shrink. Excellent for use on imperfect surfaces and filling gaps and bonds ABS, glass, ceramic, porcelain, wood, aluminum, stainless steel, cultured marble, fiberglass, granite, vinyl tile, some rubbers and plastics. Loctite Clear Silicone Waterproof Sealant is Aquarium Safe and can be used for sealing or repairing sinks, tubs, aquariums, plumbing fixtures, door frames, windows, vents, toys, appliances, gaskets, weather-stripping, outside of fireplace doors, and shoes and boots as well. Not recommended for use on the following plastics: polyethylene, polypropylene, polytetrafluoroethylene (PTFE), polymethylmethacrylate (PMMA), polycarbonate or PVC. Not recommended for use on marble, limestone, cement, concrete, brass, copper, magnesium, iron, zinc or galvanized metals.