Marine-Tex Epoxy Putty handles like putty, hardens like steel, and sands like wood. Nonmagnetic and noncorrosive, this legendary high-strength repair compound is designed for filling, bonding, and rebuilding wood, fiberglass, ceramic, glass, metal, masonry, and many plastics. Creamy paste consistency can be applied on vertical or horizontal surfaces and easily fills gaps to rebuild damaged components. Provides waterproof repairs that can be used with fiberglass tape or cloth to bridge holes and reinforce structural repairs as needed. Impervious to diesel fuel and many common acids, alkalies, solvents, and chemicals. Use for emergency and permanent repairs to hulls, decks, stripped fasteners, piping, and tanks. Hardened putty can be sanded, drilled, and painted. Gray is recommended for metal and machinery repairs with a compressive strength of 13,000 psi.