First time users of gel coat can come across many problems with applying the gel coat. We will be doing a series of posts that describe the different issues and remedies for the various issues.
|Problem||Cause||Solutions or Item to Check for|
|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
|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)
|Gel coat too thin||Cure laminate slower. Laminate in stages.|
|High exotherm of laminate||Use lower exotherm laminating resin.|