Hazy GC50


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wochi
wochi
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Hi all,



i finished my first part today using GC50 gel coat. Poblem is that the part got hazy and on an yellowish side.
What could be the problem? I sprayed the mould with gel coat spraying gun, let it cure for about 4 hours (25º over here) and then epoxy infused. Into the oven, cured at 50º for 8h.
The primarly objective was to fill the pinholes that i allways get no matter how perfect is the insfusion, and that resulted very well! But when i look at the part compared with other with no gel coat is very noticable the difference. The yellow tone i can understand as beeing a polyester gel coat. But the haze is a big problem.
Any ideas for the cause of this?

Thank you!
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wochi
wochi
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Group: Forum Members
Posts: 31, Visits: 188
I tryed both ways. Making a very thick coat and a very thin coat. I have measured the thickness and it was 0.3mm on the second try.
Catalyst is a couple of months old. From a local supplier as EC doesn´t ship this product overseas and had no problems before with it.
My last try will be doing a brush aplication so i can rule out moisture on the spray gun. Although it seams very unlikely to be the problem.

As for the pinholes i gave up on trying to get them all out. No matter how i hard i try i allways get them. Even demoulding most of the parts seem perfect but if you do a close inspection you seem them and they show up pretty nasty when i´m applying the clear coat. I tryed all. I degass, i pre heat the resin, i make vaccum drop tests, everything i could find i tried. Never had a perfect part with absolutly no pinholes.
GO

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