One day I got a flat tire on my car. I took the flat to the base gas station on K.I. They said they had a new way to patch flat tires. I don't remember if it was a nail or a stone that poked a hole in the tire, but anywho, they reamed out the hole and glued a plug in the hole. The spare tire on my Corvair sat above the engine in back. I guess the heat from the engine was too much for the repair on the tire as after awhile (I don't remember how many days it was) the plug blew out of the tire and it was flat again. I took it back and they put a patch on the inside of the tire and I didn't have a problem with it again.
One of my cousins said that at about the same time period he had a flat tire and took it to a gas station. The owner of the station says "I got a new way to fix flats. I don't have to take the tire off the rim to repair it." He proceeded to ream out the hole and install a plug. After that my cousin told him, "But that tire has a tube in it."