Posted on December 10, 2019December 28, 2019 by MPK Enterprises Using MPK-70 Polyurethane Casting Resin This Video shows Carl Hill Working with MPK-70 POLYURETHANE CASTING RESIN. Post navigationPrevious post: How to Make a Cup Mold Using RTV Silicone/ResinNext post: How to Make an Open Face Mold and Cast Resin