A few years ago I had an early 90's GMC JImmy 4x4 (same thing as the Blazer) with the stock aluminum rims and had a slow leak in the drivers side front tire.
Every other day i'd have to put air in it.. always meant to take it to the tire shop and have it fixed, just never got around to it.. and since it sat in the garage next to the air compressor, it wasn't a big deal to "top it off" with air in the mornings.
One night I ended up staying the night away from home, and sure enough, the next morning I had a whopping 10lbs of air in the tire.. so I drive to the nearest gas station in the hopes of them having an air pump, but just my luck, it was out of order.
Getting it fixed was out of the question, since it was Sunday, so I picked up a can of fix a flat and pumped it right back up.
I drove that truck for 2 years with the fix-a-flat repair on that front tire, and never had to put air in it again!
What you wanna remember is after you first put the stuff in, DRIVE the vehicle for about 45 minutes, and let centrifigual force evenly distribute the goo and give it time to set up.
If you just squirt it in and let the vehicle sit, all the goo will settle to the bottom of the tire, and cause a balance problem.
But if you've already got the rim off the vehicle, you might as well take it somewhere and get it fixed right.
