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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Warren (Staff)
Warren (Staff)
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How thick was the gelcoat? Also was it humid when you sprayed or let it cure?  Both excessive thickness an moisture can cause a haze

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
wochi
wochi
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Hi Warren,

thanks for your reply.

I really don´t know how thick it was. First time using it. But it can´t be that thick as in corners you don´t see a huge layer of gelcoat. Also no drips in the mould when i sprayed.
Moisture is not the problem as the lines have filters and i use same line to lacquer my parts with no problem.
If it´s the thickness how can i know if i´m applying the correct amount of gel coat?
wochi
wochi
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Did another part today, with half the gelcoat. It was so thin it opened some "holes in the mould" but as it was for testing to se if it was a thickness problem I proceed anyway.
Still the same problem. Hazy when i look from certain angles.

Any solution to this? I ordered 5kg of gc50 and seems that i won´t use it because it´s not acceptable to have parts like this!
GO

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