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I am mounting my jack plate. I plugged my transom drain (below water line with the goofy plastic ball set up ) and made various repairs on the transom. Gel coated over the plugs/repair. I have read where gel coat is not 100% water proof. What coating could I put on to seal the outer surface. More of a spot repair. I was just going to brush on some two part epoxy resin and the splash on some of my ablative bottom paint over the area. So much going on back there looks do not matter. Thanks.

Garris