I'll see if I can thumb through my papers and get the name of the sealer. Its a two part epoxy sealer you mix and pour into the tank and let it coat the inside. You need to keep rotating the take to make sure everything is coated. I've only used it on motorcycle tanks. It takes a full qt for a bike tank so I can only think it would take a lot more for a truck tank. Again, I have never had to clean out a large tank but I would think it would start rusting again. I'm in the dark about this, but willing to learn.