This epoxy waterproof sealer finds and fills leaks. Easy to apply & dries overnight. Gluvit barrier coat seals and protects hulls and decks. Provides superior protection for fiberglass, wood, aluminum, and steel. Seals leaky seams and rivets in aluminum hulls, and leaks around fiberglass cabins or decks. Hard protective coating flexes with hull movements to bridge and seal hairline cracks. This epoxy waterproof sealer finds and fills leaks. Easy to apply & dries overnight. Natural color can be thinned with lacquer thinner.