Awhile back there was a post from someone wanting to know what to use as a fiberglass mold release agent. The outfit where I got my epoxy and cloth from had a brochure on waxing fiberglass plugs and molds in which they mention two products, OP-600 and OP-500 mold release wax, made by Oscars.

The brochure states that the wax has a high carnuba content and is similar in looks and application to car wax. As car wax is readily available to everyone, this would solve a lot of problems, if it worked. Car waxes come with varying amounts of carnuba in them and, as usual, the higher the carnuba content the higher the price.

The brochure said; five thin coats of wax applied in alternating directions, let each coat dry for 1-3 hours then buff to a shine before applying the next coat, let final coat sit for 24 hours and buff. I don't know if we would need to be this meticulous as we only use our molds a few times and the finishing surface isn't that important to us.

Has anyone tried carnuba car wax as a release agent?

Ian

PS. I also picked up brochures on making plugs and molds.