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post #8 of Old 06-11-2019
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Re: Gelcoat cracks/crazing

Originally Posted by scubadoo View Post
I used the Pettit High Build Barrier coat (2) coats on a hull that looked similar to yours. I lightly sanded in between coats and then added two coats of their marine enamel. This was all for the topsides...not below the water line. Someone suggested that the crazing in the gelcoat would keep returning due to stresses created from different temperatures and general flexing due to normal use. I kept the boat in the water full time, sailed it often and sold it after a few years, but the cracks did not return.
Pettit protect high build is a very easy to use and great product. sands easy with no clogging of the paper. forget using epoxy resins, no need with this product 2 coats and you are done. sand the surface with 80 grit, wash and apply. sand to desired finish and paint. covers gelcoat grazing and they won't come back for another 47 years

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