When mixed, System Three Flotation Foam undergoes a chemical reaction that produces polyurethane foam in a 2lb/ft3 density, United States Coast Guard approved for flotation. This foam also is an excellent insulation material that is unaffected by fuel, paint, solvents, polyester and epoxy resins. One quart of mix will produce about one cubic foot of foam. Each cubic foot of foam provides about 60 pounds of buoyancy. This Gallon Kit makes approximately 5 cubic feet.