Liquid Urethane Foam Kit, 8 Lb Density, Includes 1 Gallon Part A & 1 Gallon Part B Two part urethane pour foam transforms into a rigid closed cell foam resistant to water absorption Once cured, foam can be laminated over with polyester, epoxy or vinyl ester resin without problem. Can be poured in multiple layers with excellent bonding between layers. Excellent for Flotation, Insulation, and Structural Uses 2 Gal. of Mixed Liquid Makes 2 Cu Ft of Foam