Sealant that can be applied to wet surfaces?

[mattakfish]

Anyone have a favorite sealant they use that can be applied (and will actually stick and seal) wet or damp surfaces? I'd like to use it to seal some leaky through-bolts on an aluminum freeman hatch on a fiberglass deck. Eventually I'd like to remove and re-set or maybe even replace the hatch entirely, but that will require some lengthy drying-out time and glasswork since it looks like the hatch was originally installed with 5200 and the deck's wood is exposed. Temporarily, I'd like to try using a sealant on the bolts and around the inside and outside edge of the hatch base. I've been considering a building product called lexel as well as a product called H2 Hold by Devcon. It will need to be flexible and I think it needs to be compatible with the dried 5200 (or maybe its sika flex?) that I think is already there. Any ideas?

[Lulu]

It will be hard to find anything that seals wet and doesn't adhere permanently. I'd try Sika-flex first, put this stuff is an adhesive as well as a sealant. Silicon or 5200 is not going to seal if the surface is wet and or dirty; its a waste of time and money.

[mattakfish]

Yeah, 5200 definitely needs dry and clean surface. That's also been my experience with sikaflex and I do prefer it for most applications but just not on damp surfaces. Got some more info on lexel, which is supposed to stick to damp surfaces and stay flexible so I will probably give that a try for the time being. I think I'll eventually need to re-bed the hatch frame. Thanks for the reply!

[MKP]

GE makes a sealant called Ultraglaze SSG4000. It will setup wet. I've used it on several wet areas with good results.

[actionalaska]

Pro seal, it can go on wet and there's nothing it won't stick to. it's primarily used on roofs in construction and around doors/Windows when you know they're going to be blasted with water, like on the "weather" side of houses. Available at most home improvement and hardware stores. Comes in a tube like silicone in multiple colors. Be prepared for sticker shock.

[pomfret1uku]

Splashzone could be used, probably. Hardens underwater