My Bronco's tank rusted to the point that it started to leak. I didn't want to buy a new tank, so I found a catalyzed sealer that you mix up and slosh around inside the tank, then let it set up. (It's not as cheap as JB Weld--it was about $30). I spilled some on my concrete floor. It is still there, 15 years later because it's stuck so well I'd need a grinder to take it off. The Bronco's tank is still holding gas.