Re: What type caulk?
Ya wanna keep as much water out as you can, fiberglass is not waterproof!!!! Gelcoat is, but bare fiberglass is not. so any hole in the gelcoat (i.e. screwholes for hardware, etc) should have some sealer, not only is it used as a sealant, but also a bedding compound for hardware. Excess water inside the hull can be absorbed over time and cause the wood core in things like stringers and decks to rot and fail.
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