View Full Version : How long until fiberglass is damaged when exposed to water?

07-29-2013, 02:46 PM
Hi all.. I scraped some rocks last weekend and put some scratches in the gelcoat that are down to the fiberglass in some spots.. I checked it out with a scuba mask. I don't have a good way to get it out of the water right away. Does anyone know how soon I should try to get the boat out of the water before damage to the fiberglass starts to occur?

07-29-2013, 02:50 PM
Gel is cosmetic only... the fiberglass below it wont be damaged due to water exposure. Depending on the type of resin MC used, it *might* be sensitive to UV- but being on the underside of the boat, I wouldnt worry about it until the off season.

07-29-2013, 02:54 PM
If it soaks up water then it will have to be ground completely out until you reach dry fibers before you can conduct a repair.

If you can get it on a lift and let it dry, you could put some 3M 4000 on it until you can get it repaired.