I would venture to say that Am_Fear is referring to the glue that typically comes with bicyle tire patch kits. It is extremely flammable and many people will set a match to the glue then quickly blow out the flame before applying the patch. The reason for the flame was to get the glue hotter as it supposedly causes the patch to stick better and dry faster to the tube.

My experience after patching too many flat tubes (until I discovered Tuffy tire liners) is that I never resorted to the match and flame, rather I just applied the glue and waited a few minutes for it to dry enough and stuff the tube back into the tire and pump it up with air.

Now days some people carry small strips of used bicycle inner tube in their survival kits as it does burn very well on it's own. If you happen to be carrying patch glue, you have the perfect combo for a surefire, fire starter.