There are only two places on a boat where 3M 5200 is appropriate: the keel to hull joint and the hull to deck joint. That is what the stuff was developed for. So use 5200. I've seen videos where all the keel bolts had been removed but the keel was bedded in 5200. Boat was hanging in the travel lift with nothing but the 5200 holding the keel on. They had to cut it free with a Sawzall. The stuff works for that, but don't use it anywhere else.