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Moldmaking and Casting: Brush-on silicone mold tips

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Published on Aug 28, 2011

This is a simple mold we made of a light switch cover to illustrate thickening 73-25 silicone. We used TinThix thixotropic additive to thicken 73-25 to a brushable paste. Once the 73-25 cured we used some of our Extra fast set plaster bandages to create a shell to support the rubber mold. EZ Flo casting resin was then used to create a plastic duplicate of the original.

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