Originally Posted by TRBenj
The only thing I would be using silicon for on my boat would be to seal the cupholders!
Permatex RTV has its place inside the engine (intake manifold gaskets, etc), but not on the hull.
Seriously, below the waterline? Thats just a bad idea. You get a leak there and your boat can sink. A marine sealant meant for underwater gear would be the proper thing to use.
Ok TRBenj...your MC-OCD just got a merit increase...
I would only use RTV on those exhaust screws and flanges - okay and maybe for the mature ladies on the pitot screws. Anything else would get a polyurethane or or poly sulfide...
Cool...this is almost like and oil discussion...