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First time users of gel coat can come across many problems with applying the gel coat. This is continuing our series of posts that describe the different issues and remedies for the various issues. Click here to see Part 1.
PROBLEM | CAUSE | SOLUTIONS OR ITEM TO CHECK FOR |
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Fading-also see water spotting | Poorly Cured Gel coat uneven | Check catalyst levels and film thickness-18± 12 mils}. |
Improper cleaners or chemicals | Do not use strong alkaline or acidic cleaners. | |
Fiber pattern in parts | Insufficient cure | Correct excessive or insufficient catalyst level in gel coat and/or laminate. Wait longer before pulling. Do not pull while laminate still has heat. Check for low temperature. |
Transferred from mold | Check for contamination by water, oil or solvent. Refinish mold. |
|
Glass cloth | Too close to the gel coat. Should have 2 layers of cured 1.5 oz. mat or equivalent chop between gel coat and cloth. |
|
Woven roving | Too close to the gel coat. Should have 3 layers of cured 1.5 oz. mat or equivalent chop between gel coat and woven roving. Use 18 I+ 2) mils, wet. |
|
Gel coat too thin | Cure laminate slower. Laminate in stages. | |
High exotherm of laminate | Use lower exotherm laminating resin. | |
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