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I've never used the stuff, but it has a reputation for sticking to everything. Have you tried a release agent? I'll offer some speculation on what should probably work (the first things I would try in your situation). If the shape of the object lends itself, wrap it with oven parchment paper. That's impregnated with silicone, takes high temperatures, and ...


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There's a technique I've used for a similar requirement that doesn't require thermoforming or vacuum forming. You end up with a flexible, rubbery dome (or other shape per the mold). The first step is to stretch a stretchy cloth material over the mold (needs to be a convex mold for this, where you can stretch the cloth over the outside). Stretch it where ...


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