Join Date: Nov 2001
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Re: Fiberglass release agents
I don't know of anything that will keep the foam from melting however there is epoxy that doesn't attack the foam and foams that are not attacked by the other resins. If the resin says poly anywhere in it, it'll probably melt the white bead foam.
Look in the Yellow Pages for plastics, you should find somebody that sells the release agent especially where you live. The stuff I bought was green and came in a quart bottle (not a national brand, packaged and maybe mixed locally). I used maybe a third of it or less to make a fiberglass divider panel for my halftop using a metal one from a scrambler for a mold. I've used wax, WD40 and Pam for small projects, but for something that size I'd definitely use the right stuff.
From experience, I'd also advise that you use woven cloth on the outer surface and then you can use the mat on the inside. Also, it works better to pour the resin first and then push the 'glass into it. If you try laying the 'glass out first and then try to get the resin to wick through, you will probably wind up with dry spots.