Issues with the gel coat on my mould

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Issues with the gel coat on my mould

Author	Message
Adelbolide	Adelbolide posted 11 Years Ago HOT Topic Details
Group: Forum Members Posts: 16, Visits: 112	Hello all, I hope someone could help me with my "little" problem(sorry for the errors, english is not my mother language). I just finished my mould that I made following the videos on the easy composit home page using the uni mould kit products. And I don't think I missed a step or did something wrong, but on one spot I got something strange. Something went wrong and I don't know what or why. It's like there's been some chimical reaction that gave this white layer so that the gel coat couldn't attach as it should. I join some pictures to show you. What should I do? Can I polish this spot then apply a thin layer of gel coat and repolish or is this a bad idea? I just hope I don't have to start all over. Thanks in advance Attachments IMG_1872.JPG (585 views, 1.00 MB) IMG_1870.JPG (544 views, 1.00 MB) IMG_1871.JPG (432 views, 1.00 MB)
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wozza	wozza posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	From the pictures it looks like something on the surface of your plug may have reacted with the gelcoat. What is your plug made from and what release agent did you use? Is the plug surface now damaged? Was it difficult to demould? When the exotherm kicks in the temperatures get well over 60 degrees C more than enough to soften paints and even some plastics causing major problems. Warren Carbon Copies Ltd
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Matthieu Libeert	Matthieu Libeert posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	Looks like a problem called Alligatoring, Look for it on google Might be a problem with mixing ratios, a to thin coat of gelcoat or problems with the releaseagent (at least that was the cause of the problem when I had it once) Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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Warren (Staff)	Warren (Staff) posted 11 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 8.5K	Might be alligatoring but its uneven nature leads me to think some kind of contamination or solvant reacted with the gelcoat. You can fix it in the same way any gel coat repair is done. Sand it out and refill with fresh gelcoat mixed with a little Solution MW Wax Gelcoat Additive to prevent the cured resin being tacky. Then once cured, sand flat with surrounding gel and polish back up. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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Adelbolide	Adelbolide posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 16, Visits: 112	Hello all, thanks a lot for your help and explications To answer your questions, I followed the tutorial, but there was a crack on the surface, so I filled it with the yellow filling wax and gel coated it over. And I think you're right, with the exotherm kicking in the wax melted and reacted with the release agent and gel coat. I'm glad I can repair it. Thank s a lot for your advice
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Adelbolide	Adelbolide posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 16, Visits: 112	Warren (Staff) (13/10/2014)You can fix it in the same way any gel coat repair is done. Sand it out and refill with fresh gelcoat mixed with a little Solution MW Wax Gelcoat Additive to prevent the cured resin being tacky. Then once cured, sand flat with surrounding gel and polish back up. Hello, I bought the Solution MW Wax Gelcoat Additive but I'm not sure if I should use the catalyst with the gelcoat and the additive or not. Thanks in advance
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wozza	wozza posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 688, Visits: 5.4K	You still need the catalyst, the wax additive rises to the surface creating an air seal so that the gelcoat fully hardens. Warren Carbon Copies Ltd Edited 11 Years Ago by wozza
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Adelbolide	Adelbolide posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 16, Visits: 112	thanks for your help
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