Poly-U-Foam is a urethane foam that provides excellent flotation, soundproofing or insulation. Mixed 1:1 and easy to install in hard to reach places. Poly-U-Foam bonds to wood, metal or fiberglass and foams wherever it is poured. It is impervious to solvents and gasoline. A 2 quart kit will yield 2.5 cubic feet of space. Do not use below 70°F. Available in 2lb density.