Join Date: Dec 2009
Thanked 0 Times in 0 Posts
Rep Power: 0
UV resistance in sealants
My relatively new to me boat had the hatch (acrylic?) window part replaced before I bought it last year. It leaked a bit last season, and this season the sealant has failed completely and the window comes right off the frame when opened.
I've asked the yard that did the work in the first place to fix it. The said they would but they haven't got a round tuit yet.
My question is why the seal would fail so badly so quickly. I can see the initial small leak having been from missing a bit of bead on the caulk job or whatever, but for the entire seal to fail in a year seems to suggest a problem with the sealant. Could they have used a sealant which degrades that quickly in sunlight? Could it simply be the sealant wasn't adhesive enough or is incompatible (eg. LifeCalk polysulfide)
The stuff is black (matching the rubber window-to-frame gasket) and still somewhat flexible.
Assuming the round tuit is still backordered at the yard, I'll probably just fix it myself. I'm thinking either LifeSeal (silicone/polyurethane blend) or just a straight silicone like 3m. Presumably the LifeSeal will be more adhesive, but I can't find anything about UV resistance.
Anyone else had this problem?