Mold for Fiberglass

jkvincent · Post by **jkvincent** » Mon Jun 22, 2009 08:59

I have a polystyrene mold that I'd like to use to fabricate something in fiberglass,
what would I use to coat the polystyrene to prevent the resin from sticking to the mold?
I'm not sure the resin would even stick to the "plastic".

What do boat builders use for their molds?
Jim

jkvincent · Post by **jkvincent** » Mon Jun 22, 2009 09:16

I did a Google search, ...Pam cooking spray.
I think I'll give that a try.
Jim

Paul Agaliotis · Post by **Paul Agaliotis** » Mon Jun 22, 2009 16:03

I use automotive paste wax. It even smells like the mold release. At work we use a product called Rulon.
Paul