2 lb density expanding pour foam, 2 part polyurethane closed cell liquid foam for boat and dock flotation, soundproofing, filling voids, and insulation (2 gallon kit) fiberglass supply depot inc. <p>flotation foam is a polyurethane 2 part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy.</p> <p>2 lb. density. flotation range is 100-120 lbs./qt. and 480-600 lbs./gal.</p> <p>the 2lb foam is recommended for void filling in nonstructural applications.</p> <p>it can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy.</p> <p>this foam has been tested in accordance with u.s. coast guard regulation # 33 cfr 183.114 .</p> <p>this foam is approximately 95-98% closed cell which resists absorbing water.</p>