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Anyone seen this before? Mold surface problem...

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Active Member
Joined
Aug 21, 2014
Messages
39
Location
Washington State
I've made several molds now for my project and thought I was getting the hang of it until this happened...

IMG_8032.JPG

The surface of the tooling gelcoat is severely wrinkled in some places.

At first I thought it was because I liberally applied the PVA "backup" release agent when it was pretty cold (~45 deg F) and I don't think it dried all the way. However it happened again in a few spots the next time I made the mold even though I did not use any PVA release agent.

I'm using a duratec finished plug, coated in Meguires wax & PVA. The mold lay up is sprayed tooling gelcoat, a thin layer of PW glass, follwed by 4 plies on 1.5oz chopped mat. Resin is wet lay up vinyl ester.

I'd like to get to the bottom of what is causing it before making more big molds.

Any help appreciated.

Thanks
 
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