3M Marine Adhesive Sealant Fast Cure 4200FC Black, 1/10 gal | 051135-06564
3M™ Marine Adhesive Sealant Fast Cure 4200FS Black bonds and seals fiberglass, gelcoat and wood. Ideal for rub-rails, stern-joints, deck and through-hull fittings, and access plates. Medium strength allows for disassembly.
Heard about Boelube for years. Finally had a chance to try it on several projects. It definitely works well and better than anything else I have ever tried. Would recommend.