 Fiberglass molding - Making a Mold: Encyclopedia II - Fiberglass molding - Making a MoldA plug or buck is required first to make a mold. This will be an orginal part that is to be copied. First the plug must be waxed with mold release wax. Depending on the desired surface, PVA (Poly Vinyl Acetate) may be sprayed on as an additional mold release agent. However this will reduce the smoothness of the molds finish.
Once the plug has its release agent applied, gel-coat is sprayed onto the plug. Gel-coat is a pigmented resin without reinforcement. Tooling ...
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