Polymer Corporation | Precision Plastic Parts Manufacturing We are the world’s leading producer of liquid resin cast parts and an award-winning producer of injection-molded parts, machined plastic parts, and quick-turn PolyProto™ parts. We do it right, do it f We are the world’s leading producer of liquid resin cast parts and an award-winning producer of injection-molded parts, machined plastic parts, and quick-turn PolyProto™ parts. We do it right, do it fast, and do it cost effectively. Give us a call.