I use it from time to time on some sign projects (and most recently to re-attach my door skins to my RV side door - loooong story) but I wouldn't rely on it to do anything but be sticky.

I don't exactly follow you though...what are you trying to seal that something like silicone or some of the super 3M products wouldn't take care of? Are you talking about the bottom of the hull socket or between the wing tube and the socket?