Back in 2003 I had a new Chevy. Had it less than a month, got home one day and there was a big thorn from a locust tree sticking out of the sidewall. Don't know where it came from, as it had never been off pavement & there were no locust trees in the areas I had been. I looked at it & the more I looked at it the madder I got. I didn't want to have to replace a new tire with less than 500 miles on it. The more I thought about it, I decided to plug it & see what happened, knowing plugs don't go in the sidewall. Got the stuff ready, pulled the thorn out & air started leaking out. Put in the plug & the tire kept air & didn't have any problems. Stayed that way until it was time to replace all 4 tires. You bet I was lucky!