Talk Composites - The Forum for Advanced Composites

Epoxy resin infusion in a glassfiber/polyester mould?

http://www.talkcomposites.com/Topic2722.aspx

By Sjogren-Racing - 9/1/2012 6:17:14 PM

Hello

I´m gonna buy your infusionkit with epxy for making a roofpanel in carbon.

My problem is that my mold is in fiberglass and polyester.

What i have read is that not so good for use with epoxy? I read that the only soloution is to have PVA that isolate the polyester from the epxyresin?

But if i use https://www.easycomposites.co.uk/clearpol-iso-npg-clear-polyester-gelcoat

should that work? Becouse its a polyester gelcoat that work with epoxy.

I am thinking wrong? Or is that gonna work?

I am from Sweden so sorry if i spell wrong.

Best regards Magnus
By mikew - 11/18/2012 11:39:45 AM

So better to use wax first then pva?

I ask because I have the same issue. I inherited a polyester mould and wiped it with 2 coats of pva.  Did the (epoxy) infusion last night and it was VERY hard to release the part.  I don't want to use the GC50, I don't think there is any need.