gel coat and fiberglas

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Robb Newman

Oops - posted this in the guest forum by mistake. Here it is again: We've got a fiberglas dingy that we put some gouges in last summer. Two of them in particular go all the way through the gel coat, and the fiberglas is exposed. The fiberglas strength is in no way compromised - the gouge does not extend into the fiberglas. My initial thougth is that I can simply add gel coat to cover the gouge, then sand it smooth. However, as I read the instructions on my can of Seafit white gel coat (model 34803, a two part gel coat), it says in bold capital letters: "GEL COAT SHOULD NOT BE APPLIED OVER AN EPOXY." Here's my question: fiberglas is just glass fibers in a matrix of epoxy, so if I put gel coat in the gouge, it will be in contact with the epoxy of the fiberglas, right? What happens if you do install gel coat over epoxy? Should I put something else in the gouge first, and then gel coat over that? Or is the epoxy used to make fiberglas a different sort of material from the epoxy that the gel coat instructions refer to? Or, since it is just on my dingy, should I quit worrying and just fill the gouge with gel coat? Thanks!
 
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Clyde Lichtenwalner

No Epoxy

There is probably no epoxy on your dinghy unless you put it there. I believe that the use of epoxy resin is very expensive, and it is therefore not a common proctice among production boat builders.
 
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Dan Arsenault

Quit worrying

Just go for it. If you were doing a large area it would be more critical but you'll be fine. Just clean it with clean cotton cloth or paper towel and acetone first. Fiberglass, by the way, uses a polyester resin which is different from epoxy. Good luck, Dan Arsenault Serendipity Too
 
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