This isn't a tip yet, but if it works will save a bunch of $$$ and might be an alternate to slime. I haven't heard of anyone trying Flex Seal on a tire before, so I thought I would try this to re-seal the inside of the tire. My situation may be different from yours, but I prefer to plug the holes in tires, but there comes a point of having too many plugs, and eventually they will leak also. New tires are expensive. I picked the worst set of tires to try this on, and will follow up with the results later on.