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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Thicker gelcoats will reduce in clarity for sure.  Also it looks like the orangy GC50 is pretty old, perhaps some of the styrene has dried out since you last used it?

It is strange you are still getting milkyness with the new material which kind of rules out the old material being at fault due to age so something else is clearly going on here. Maybe thickness, humidity? contamination when spraying? (eg oil and moisture through compressor is a common one)

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
GO

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