Sealing inside of aluminum boat

[CaptainGoodboy]

Good day.
I have a 1962 MirroCraft aluminum boat I'm building a new raised floor in. The boat doesn't leak, I'm wondering if there's a good product to brush on the inside of the boat hull to help with future leaks and corrosion before I install the raised floor above it.
Any thoughts?

 

[JASinIL2006]

I'm not sure I'd bother if it's not leaking, but if you want insurance, you could coat the seams with Gluvit and then paint the hull before installing the deck.