Early Tire slime was horrible. I remember a case where a friend got a flat, got sprayed, joked about how he shaved his legs because he let the slime dry on his calf and took the hair off when cleaning it off. But when he got around to taking the tire off to repair. The slime seemed like it vulcanized with the tube and tire. Really messed things up. Up until this summer, I had not encountered a flat for the past 5 years and that was many, many miles! Now I have scored two in as many weeks. One was user error, the other was a mystery. small pin hole on the onside side, tire was a 700 x 40c and had nothing in it. Must have been an in/out thing. From what I understand with the new slimes, it would have benefitted from this type of flat, but I would rather slap a patch on this one and ride onwards. So, no slime here.