Tire plugs can dry out and sometimes shrink and cause the tire to leak air again.
However when the tire plug is properly installed it will usually last the life of the tire before the tire needs replaced.
Having the tire patched is a much better way of fixing a hole in a tire but sometimes a tire plug will work just fine.
Tire Plugs do last when properly installed.
Tires plugs will last the life of the tire when the tire plug is properly installed.
A Tire Plug that is installed correctly is a permanent repair although tire patches are much better.
Tires can be plugged more than once as long as the holes are not too close together.
You can plug a tire twice if you get a hole in the tire more than once.
However patching a tire is much better but when done properly a good tire plug can hold and last until the tire needs replaced.
I've plugged tires 4 times before and the tire lasted until it needed replaced at 50,000 miles.
Just never put a tire plug in a sidewall as that is not safe.
if the tire has a hole in the sidewall it should always be replaced with a new tire instead of trying to plug the sidewall.