In retrospect, the hot patch idea was really cool, at the time I thought nothing of it because I was pretty young and hadn't seen glue patches, so this was the only way I knew of to patch tires. It's true though, it wouldn't be a good idea to use it on a road tire, it might cause damage around the patch area.
I'm kinda curious if anyone else has seen these hot patch kits around lately. It's a neat little novelty.