Surface Coating Curved Mold

[benkinsella85]

Hello all,
I'm trying to put a surface coat on a curved mold surface without it sagging, running, or creating vastly different thicknesses of resin. Any advice on technique and/or the proper epoxy/gel coat to use for this application? My parts are out of epoxy, so whatever i use must be compatible. THANKS!

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[keebler303]

Are you trying to coat the mold or apply a surface layer to the mold which will be bonded to your parts?

I use Duratec for mold surfaces. For a surface layer on a part, any gel coat laid down with a cup gun at 20-30 mil thickness should pretty well hold its shape and not run or sag.

You can find everything I mentioned at fibreglast.com

Matt

[keebler303]

Duratec Gray Surfacing Primer in stock | Fibre Glast
Epoxy Surface Coat for room temperature epoxy molds | Fibre Glast
Gel Coat Cup Gun small / medium molds & parts. In stock | Fibre Glast

[benkinsella85]

...And those polyester gel coats on fibreglast.com are compatible with epoxy?

[keebler303]

Thanks for answering my question...

The epoxy surface coat I linked to is an epoxy gel coat. You can't use poly or vinyl ester gelcoat with epoxy resin. You've provided almost no information so it's hard to help.