When you consider adhesive sealants consider them as such:
3M 5200 (polyurethane) is like epoxy. Removing an item attached with this stuff will often cause damage, especially to wood. (700 psi tensile strength)
Sikaflex 291 (polyurethane) is quite adhesive, but removal with care goes well (300 psi tensile strength)
Boatlife Lifecaulk (poly-sulfide) is mildly adhesive and easily removable (100 psi tensile strength)
I endorse all 3 products when used according to their characteristics.