Two Part Liquid Urethane Expanding Foam 2.2-LB Density


Our 2.2LB density marine foam is recommended for void filling in nonstructural applications. This product can be poured underneath decks and inside cavities where lightweight flotation foam is needed to provide buoyancy. This foam has been tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114 . This foam is approximately 95-98% closed cell which resists absorbing water, however continuous water submersion can eventually lead to loss of buoyancy over a period of years. We recommend this product strictly for flotation applications. If looking for a liquid foam for sculpting or casting we recommend using at minimum our 3LB or 4LB density.

  • This two-part liquid, expanding rigid urethane foam is a closed cell, pourable foam, which will resist the absorption of water.
  • The densities shown refer to the weight per cubic foot of expanded foam (12" x 12" x 12").
  • Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting.
  • This product can be poured in multiple layers with excellent bonding between layers.
  • All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above.
  • Accurate measuring of these products is extremely critical.
  • Working time before foaming: approx. 45 seconds
  • Time before full expansion: approx. 5 minutes
  • The lightweight foam is commonly used for filling voids, filling under decks and practically any other flotation or insulation application. Higher densities are used for architectural castings, support applications and has virtually an unlimited number of potential uses.

Kit sizes are listed by the size of the containers they are packaged in, not the volume of the contents.

Volume before mixing. 1/2 Gallon Kit = Approx 1.7 Quarts. 2 Gallon kit = Approx 1.8 Gallons. 8 Gallon kit = Approx 7.6 Gallons

Volume after mixing. 1/2 Gallon Kit = Approx 2 Cubic Feet. 2 Gallon kit = Approx 8 Cubic Feet. 8 Gallon kit = Approx 32 Cubic Feet

Product Information:

  • Free Rise Density: 2.2.0 Lbs per cubic ft
  • Expansion Rate: Approx 25-30x Liquid Volume
  • Buoyancy (flotation) 60 Lbs per cubic Ft.

Physical Properties:

  • Parallel Compressive Strength: 40 psi
  • Tensile Strength: 30 psi
  • Shear Strength: 30 psi
  • Flexural Strength: 50 psi

SDSUrethane Expanding Foam Part A SDS

SDSUrethane Expanding Foam 2.2lb Part B SDS

Urethane Expanding Foam 2.2lb TDS