Polyurethane Pour in Place Foam is a two component liquid material that, when mixed together, will expand to approximately 25 times its volume at 21° C. It has a density of 2 lb. per cubic foot and is used to fill cavities and voids, insulation for tanks and holds, and as floatation for docks, etc.
FiberTek PF2 Rigid Polyurethane Pour In Place Foam, 2L, 4/case