Get Price 2 inch thick machinable high density plastic sheet for . OUR RIGID POLYURETHANE FOAM TOOLING BOARD Download Tooling Guide. Tool and mold makers unt on General Plastics for superior-quality LAST-A-FOAM machinable foam, polyurethane molds, and pattern-to-tool capabilities. (High Density polyethylene) Plastic Sheet 1/2" x 12" x 24 ...