If you ever find yourself with a slow leak or a flat tire - Fix-a-Flat is a great item to have in your trunk.  Yes, this little thing really will fix your flat. Even huge pick-up and SUV tires. No need to jack up. Just press the nozzle - whizzzz - and it repairs and re-inflates your tire. You definitely should carry one in your car or truck. At $5 it is cheaper than getting your tire repaired at a shop.

But that's not the best thing it offers. This amazing can of stuff will also prevent flats and slow leaks. Fix-A-Flat inserts a complex liquid into your tire. Leaking air instantly polymerizes it to plug up any hole.  Although I have not used the industrial version of this invention, farmers and the army use a similar compound to keep their gigantic tires going.

This consumer version works great as a flat cure. I need to pump up my treated tires far less often, even the tires with chronic leaks in them, and have had no flats on well-worn tires.

You can find Fix-a-Flat at most hardware stores for about $5.