Originally Posted by
arex
Slime's good stuff, but not in a bike tire. Car tires have a lot more places (besides the valve) for the Slime to go than a bike tire does.
If you're dead-set on Slime, try one of the pre-Slimed inner tubes...it's thicker and stickier than the pour-in Slime, and stays put on the walls of the inner tube instead of fouling the valve, usually.
Not really true, ask a mechanic or someone at a tire store how much they love chiseling the liquid slime or fix-a-flat off of rims so they can get a new tire to seat and hold air. For both car tires and bike tires, the answer is patch and inflate, and slime sells patch kits for all kinds of tires. There is just no reason to use the gunk. I read a LOT of reviews about the pre-filled slime innertubes and the thing that came to light is that bicycle tires are typically inflated to very high pressure, and that pressure means that instead of slowly oozing out of the hole and drying to stop the leak, it sprays out until there is none left, which spotwelds the innertube to the inside of the tire and rim.