When I do reseal jobs like that, I've learned to use RTV, because it's more easily removable, and won't leak.
I embed a stainless wire these days as a pull cord to take it back apart if I need to; just mark where you leave the end down in the rtv.
I put Liquid Nails silicone adhesive in there, and that spray on leak stopper comes off if you want it to. It's sort of like mega plasti-dip. Trust me, no water is getting in there!
Good idea on the wire!