Features and Benefits: Bondo Fiberglass Resin is the same high-strength polyester resin that is used to build most boats. Can be used alone or with fiberglass tape, cloth or mat to repair damaged fiberglass boats, snowmobiles, jet skis, bathtubs and showers.; Can be used alone or with fiberglass tape, cloth or matCan be used on multiple surfaces including metal, fiberglass, concrete, wood and moreGreat on large or small metal rust-outsCreates a strong and long lasting bondSandable in less than 2 hoursWaterproofCompatible with all paints, including gel coat and marine paintsCan also be used as a sealer on damaged and rotted wood;