Polysulfides (LifeCaulk, 3m 101) stick very well but are not adhesives like some Polyurethanes (5200). You can remove polysulfide sealed parts
without catastrophic damage to the wood. I've used LifeCaulk for over 40 years on everything and have never had a failure. The secret for removal
is slow even pressure. If you can drive a chizel a short way under the piece or find some other way to torque the piece and leave it for a short while, the fitting will lift
off. If you just rip off a piece you may get some wood with the part. I like PS over PU sealants. They are easier to work with and the unused portion doesn't go off in the tube as quickly. PS also doesn't harden with age. R&R'd the solar
system on our roof after 30 years here in Kona. The LifeCaulk was still sealed perfectly and pliable after all those years in the tropics.
5200 is an adhesive and can be a major pain to remove parts
bedded in it. You can get not so adhesive PU sealants (3m 4200) if you think you might want to remover the gallows some day. FWIW, hear there is a solvent that makes removing 5200 bedded stuff easier.
Dolfinite is a good sealant
for wood to wood. I've not had good luck when bedding metal
to wood. It's just not very good at sticking to things and does harden with age. Torqueing of the part in normal use seems to develop leaks
. Not being a big 'newer is better' proponent, I still can't help to mention that Dolfinite is ancient technology. Think Nelson used it to repair his wooden ships after the Battle of the Nile.