The Easiest Brushable Urethane To Mix!
Step 5: Demolding Rubber and Casting Plastic
Use an exacto knife to cut through the thickened shim for easy removal of the rubber. The EZ~Mix® 40 mold rubber has perfectly captured all detail from the model. Reassemble the support shell and mold and place them into a bucket for stability during casting. Make sure everything is level. EZ~Mix® 40 is a urethane rubber and requires a release agent to stop the plastic from sticking, so now pour tinted Smooth-Cast® 300 into the mold.
The plastic cures quickly: demold in 15 minutes. The result is a perfect reproduction, with a mold and support shell that can be used repeatedly.
