Pat5319 gives good practical advice for tire repair. I never tried the Power-bar trick, but it sounds interesting.

I can tell you from experience that patching your tire with a tube patch does not work. If it does work, you could probably get along without it in the first place. I tried it once and within 1/4 of a mile, the tube and patch blew right out of the hole (at 90 psi in the tire).

I tried Slime, but didn't like it either. Slime has some kind of fiber in it. It looks like cellulose fiber, but hard to tell. Anyway, the fibers balled up inside the Slime container (probably from being shaken). I couldn't get the Slime to squirt from the bottle and into the inner-tube for love or money. It kept getting clogged along the way.

A couple of days ago, I saw some self-repairing bicycle inner-tubes at K-Mart. They were about $5.00 each. These might be worth a try.

If you are getting flats more than once every, say 4,000 miles, then you should invest in new puncture resistant Kevlar tires. I noticed several advertised in BICYCLING MAGAZINE this month.

Mike