Product Description: Marine-Tex RM303K Epoxy Putty, Quart, Grey, 6/case Handles like putty, hardens like steel and sands like wood. Non-magnetic, non-rusting and non-corrosive. Self hardening plastic metal. Repairs damaged and leaky hulls, dry rot, cracked crank cases, engine blocks, fuel tank leaks, water tanks, piping, food containers. Provides adhesive and barrier coat for mounting anodes on ships. Impervious to oil, grease, brine, detergents and other chemicals on board. Will not shatter when bumped. Simple, fast and effective. Can be sanded, drilled, sawed, threaded and painted.