Yes, used lifesaver deliberately, had the totally useless pump kit in a previous car and a pothole took out both the front and rear tyres. Had to borrow the space saver out of my other car and one from a friends to get me home! Must say on that occasion they were 'lifesavers'! Had other punctures in the past too which would not have been solved with the gunk! I have no faith in this product and my experience of road side assistance has taken hours of my time when a spare can be put on and rolling again in minutes! Edited by: RogerThat