RTV molding and urethane casting provide economical ways of making accurate multiple prototypes. It is the least expensive and fastest way to create prototype parts. Urethane castings are produced using silicone molds called RTV molds. The urethane casting process begins with a pattern. Usually the pattern is a SLA prototype, but it can be any part. The prototype is suspended in a box or frame. The silicone is poured around the part and is allowed to cure. Once the silicone has cured cuts are made into the mold to remove the part. The mold is then put back together and urethane material is poured in to the mold to create a urethane casting. Once the urethane has hardened, it is removed and the mold can be used to cast additional parts. Generally ten to twenty-five parts can be shot from one mold.

     Urethane models are great for customer evaluations, market focus groups, product testing, and design verification. 

     Our vacuum casting machines can accommodate mold sizes up to 36"x24"x36". We can cast a part up to ten pounds.

     Many specially formulated 2 part polyurethane resins are available to simulate most engineered plastic materials such as Nylon, ABS, Polycarbonate, Polypropylene, and many others. See our materials specifications page for material property sheets.

    Most of our urethane resins can be colored by using pigments.