I believe that this is what is in my girlfriend's Diavel rear tyre. After a spate of punctures from flints, she decided to try it and so far, something like 3000 miles in and 1 No 8 screw, no loss of pressure. Tyre fitters hate it because it's messy and of the two types, the water based solution is preferrable. I would not advise putting it in your front tyre as the balancing goes all to cock. The rear doesn't seem to notice the fluid in it though. Andy
It's fine until you get 3000 invisibly-filled holes then have catastrophic tyre failure all in one hit.
