It's a long way to the nearest Dick's from where I live, but maybe I should make the trip. My bike shop sold me a kit for $5 that just had 8 glue-less patches and sandpaper. And they looked like something you'd use to patch a beach ball -- just circles cut in a strip of clear plastic tape. And they leak badly.

By the way, is that vulcanizing cement subject to freezing or anything? I keep my bike in an unheated shed, and I'm wondering whether it would be o.k. to leave the tube of cement in the seat bag.