A 5 pound density flexible polyurethane foam which expands and produces a seat cushion-like density. The finished results will produce light weight castings and will expand approximately 10 times. May also be colored with the addition of urethane tints. Mixture ratio is 3 parts B to 1 part A by weight. Use of a drill mixer is recommended. See our Drill mixer tools section here.
Polyurethane Flexible Foam is available in a quart (3 lb. net weight) set.