TotalBoat 2 lb. density urethane flotation foam is ideal for marine applications such as soundproofing, insulating, filling voids, and adding buoyancy. This two part expanding foam fills cavities and can be shaped to form to...

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Product Review

TotalBoat 2 lb. density urethane flotation foam is ideal for marine applications such as soundproofing, insulating, filling voids, and adding buoyancy. This two part expanding foam fills cavities and can be shaped to form to keep your boat or dock floating. Foam cures to a rigid form containing 95 to 98% closed cell structure so it is unaffected by gasoline, oil, fresh or salt water, or solvents. Even after prolonged exposure, our flotation foam maintains buoyancy.

Mix at a 1:1 resin to hardener ratio to ensure equal, even distribution and the strongest possible foam. This fast acting formula allows approximately twenty seconds for mixing and pouring, as foam will be set in place within 10 minutes. It's ready for use in just hours. 2 lb foam has a flotation range of 100-120 lbs per quart. 2 lb foam expansion: One 2-Quart Kit expands to approximately 2 cubic feet; one 2-Gallon Kit expands to approximately 8 cubic feet. All expansion rates and times given are temperature critical. Temperatures below 75 degrees F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75 to 80 degrees F or above.

Accurate measuring is critical. Once fully cured, it can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. TotalBoat Polyurethane foam is compatible with both epoxy and polyester resin systems. Our flotation foam has been tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114.All TotalBoat products are designed by boaters, for boaters. We know what works and what doesn't.



  • LIGHTWEIGHT, TWO PART POLYURETHANE FOAM: Ideal for adding buoyancy, thermal insulation, soundproofing, and filling gaps or voids; for nonstructural applications only; tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114
  • EASY TO USE: Liquid urethane pour foam has a simple 1:1 mix ratio, expands rapidly & hardens in place in about 5 min. at 70-80°F; to build multiple layers for filling under boat decks, pour expanding foam in separate batches
  • 94% CLOSED CELL FOAM: Perfect for marine applications; resists water absorption and damage from gas, oil or solvents; once cured, foam can be coated with polyester, epoxy or vinyl ester resin; can also be easily cut or carved to shape
  • IDEAL WORKING TEMPERATURE IS 75-85°F; proper temperature, timing, mixing and venting are critical for proper foam expansion; below 75°F expansion decreases; after mixing, the foam expands rapidly and becomes rigid, so clean the surface in advance and be ready to pour
  • AVAILABLE IN A 2 QUART KIT AND A 2 GALLON KIT; Yield: 2 Quart Kit – 2 cubic ft; 2 Gallon Kit – 8 cubic ft; Flotation Range for 2lb foam: 75 lbs per mixed 2 quart kit, and 300 lbs per mixed 2 gallon kit; shelf life is 6 months from date of manufacture

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