Two Part Liquid Urethane Expanding Foam 8-LB Density


Our 8LB density foam is very rigid. You can compare the density to soft wood. You are able to penetrate the foam by poking your fingernail in it, however you will not dent the foam with your hand.

  • 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 7.7 Gallons

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

Product Information:

  • Free Rise Density: 8.0 Lbs per cubic ft
  • Expansion Rate: Approx 8x Liquid Volume
  • Buoyancy (flotation) 54 Lbs per cubic Ft.

Physical Properties:

  • Parallel Compressive Strength: 250 psi
  • Tensile Strength: 225 psi
  • Shear Strength: 130 psi
  • Flexural Strength: 350 psi

SDSUrethane Expanding Foam Part A SDS

SDSUrethane Expanding Foam 8lb Part B SDS

TDSUrethane Expanding Foam 8lb TDS