What to seal welds with.

[Geritt70]

Hey guys, I’m looking for a material that I can use to waterproof the welds on my floor pans and something that can fill in some sections I couldn’t weld together. There’s some parts where my welder keeps burning through the metal because it’s just too thin. I ended up just tack welding those sections and I’m hoping that I can just fill in the gaps with some epoxy or something. If you guys have any recommendations they would be greatly appreciated! Thanks :)

[89 MJ]

Turn down the heat on your welder. If it’s worth doing, it’s worth doing right. Do a bunch more small tacks built off of one tack and keep tacking until you reach your next tack. Repeat until it’s been done all the way around. If there are pinholes in your welds, grind them (you should grind them either way) and then weld on top of that and then grind smooth. 

[88mjsally]

I used an automotive seam sealer when I did the floors in my truck since It was close to what the factory used. This is the one I used

[Minuit]

Look under that side brace before it's too late. Willing to put an unhealthy amount of money on there being more rust under there that you missed.