Preventive Leak Maintenance

[GuitarmanFL]

Hi Folks:

Newbie here, hoping for some good suggestions...

I've gotten all the interior out, including interior al skins. Since I'm in super wet Florida, I'd like to go ahead and me extra sure I don't develop leaks on my 72 27" Overlander.

I'd like to know is their a spray, preferably, or another material that while I have access that I can apply to all my seams. Everything, surprisingly, looks good as is - but I detest water leaks, so I'm thinking in a few hours I could really seal it all up extra well.

Any other advice is appreciated as well.

Thanks!

Brek