I have a kit from Safety Seal. I highly recommend a little practice. I had a nail puncture in my truck at home. I was going go over to the tire store and have them do it for free but I decided I may as well practice with my kit. Glad I did as it was not as easy as I expected. You can really feel the steel belts as the tool goes in. It worked well and I consider the repair permanent but I ruined two plugs before I figured out how to do it. Glad I didn't have the learning curve in the middle of nowhere.
It really helps to put a lot more air in the tire... lots! Use the reamer to make a hole and lube the plug tip tool and plug up with lube.
First leave the reamer in and if necessary add more air to the tire. Have the plug tool ready and pull reamer and push in plug tool. I just leave the short ends of plug and allow to wear smooth with tire. Adjust tire pressure to what you run.
Back tire, position the tire that the nail is less than 90 degree down. So you can get better pushing if you lay on the ground and push at a slight up angle.
Front tire move nail in the upper segment and turn the wheel outwards so standing you can push down using your upper body weight.
All plugs I have used were in the tire for the rest of its life. If I do see a nail and my tire and pressure is being maintaining I make a decision to take it to my tire dealer to have a patch installed. That is what service I paid for when I bought the tires after all.
