How fantastic! I got a puncture in my brand new tyre after only replacing them all two weeks before. I managed to get to the mechanics and they told me that the thorn that punctured the tyre was on the side of the tube and they could not repair it. They did however put some sort of substance into the tyre and told me that this would keep my tyre from going down. The product can be bought at almost any hardware store and I highly recommend that you get one for those emergency times where there is nowhere to change your tyre. It goes into the tyre and repairs it without the old fashion method. Has anyone tried a product like this and do you know what it is called?