The Bondo(R) fibreglass resin is the same high-strength polyester resin used to build most boats. This waterproof resin can be used alone or with fibreglass tape, cloth or mat to repair damaged fibreglass boats, snowmobiles, jet skis, bathtubs and showers. It can also be used as a sealer on damaged and rotted wood and is compatible with all paints types, including gel coat and marine paints. The resin seals concrete patches large or small metal rust-outs and joins most surfaces together to create a strong and long-lasting bond. The resin includes a liquid hardener, dries completely and can be sanded within two hours. Available in 852 ml format.