Sealing and Drilling Holes in Van

For all you van buildout-ers out there, I am redoing the framing of build out in the van that I just bought. It's bolted to the floor so I need to fill two holes and drill two more. Any beta on sealing the old ones as well as the new ones for maximum waterproofness?

Put a black plastic plug in epoxy or in marine scellant. You can also use a plug and self leveling marine scellant. You can find good stuff on Van forum searching on solar panels installs or roof fan/vent install.

Hope this help!

Ask for seam seal at an autoparts store. That is what they use at the factory.

Eternabond tape for seams, silicon for bolts. I've been using the stuff for years. I have to seal the bed of my truck and that is what I have for it. You can order it online or buy it at most RV dealerships and service centers.

eternabond.com/RV-Leak-Repa…

A few choices with the best being to weld the hole shut. If you dont weld, which is likely or you would have already done it, I would go with the automotive seam sealant. You could even get a small piece of sheet metal and seal the patch over the hole.