Had a puncture in my mountain bike tubeless tire. The seal lasts a week and a half. Bought and so far so good (two weeks). The preparation was important. Be careful, wipe the inside of the MB tire, there isn't much material. Once I did that, I cleaned it with rubbing alcohol, smeared it with rubber glue, let it get tacky, and then pulled the latch out and pushed in a bit to latch it. Leave it overnight and check for leaks. There was a very small leak at this point until I installed the sealant.