Tires

I've used it in mopeds, car, trucks, motorcycles, 4 wheelers for 10+ years now. Not just for emergencies, mountain bikers put this stuff in brand new tires so they almost never go flat or only need some air from time to time. My buddy's full size Van's tire was down to the white thread under the treads and went flat on us. Green slime and a hand pump and we where driving again, down a gravel road for 15 miles, no problems. 3 years later and someone stole the van and drove it 300 miles, slime still held. Its magic in a fucking bottle. Cleaning it off a rim isn't that hard and the tire will last till it goes bald.
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Slime has problems with cars because they have no tube. In a car, slime can sit on a rim and destroy the metal. In a bike its trapped in a tube, and a non-issue. I suspect this is more a Fix-a-flat thing than slime though.