HOW TO USE A TIRE PLUG KIT
Locate the puncture. If you don’t see or hear the puncture, spray some soapy water on the tire and look for bubbles.
Remove the offending item. This is usually easy, but sometimes the nail or screw is worn down, making it hard to get a bite on it. This is where the side-cutters come in really handy. You will want to position the tire where you get the most leverage.
Insert the reamer. This will take some effort, as you have to push it through the steel belts. Use a twisting motion and push it into the tire. Once the reamer is through, saw it in and out of the tire a few times to really make a nice hole for the plug. Yes, it is counter-intuitive, but it is necessary.
Prep the plug and installer. Pull a plug off the strip and push it through the eyelet of the installer tool. The pliers will make this easier. Push a little through, grab it with the pliers and pull the plug halfway through the eyelet.
Insert the plug into the tire. If the kit has liquid cement, apply some to the plug before inserting it into the tire. Simply push the installer into the hole in the tire until the plug is about 3/4 of the way in. Twist the installer tool 90-degrees and pull it out. The plug will stay in the tire and the tool will come out nice and easy. You may trim away the excess plug or leave it to wear away as you drive.
Fill the tire to the proper PSI. If you have a portable air compressor, this will make things easy. However, if you do not, you need to get air very soon.