didn't work for me, but my tube may have been too far gone. i picked up a couple of things of bicycle fix-a-flat at a flea market and had one in my cruiser bag. when i got a flat i tried it. the tire inflated some, but with the twist on attatchment i lost most of the air trying to take it off quick. the rest came out pretty quickly after that. so i don't know if i didn't have enough pressure to seal the puncture against the tire, or it just wouldn't have worked anyway.

brought a gallon thing of slime type stuff on clearance at walmart and use that now.