Glueless Tire Patches

I happened to be in a K-Mart store yesterday, and decided I'd see
what sort of bike stuff they had. The thing I noticed was a patch kit
that features patches that don't require cement/glue.
Anyone here have any experience with these patches? Maybe I just
have a suspicious nature, but they sound just a tad too good to be true.


Bill

__o | Let's have a moment of silence for all those Americans
_`\(,_ | who are stuck in traffic on their way to the gym
(_)/ (_) | to ride the stationary bicycle. -- Earl Blumenauer