I have used nothing but glueless patches now for the last 6 years and I can tell you after using 2 to 5 per week-thats what I said-per week, I have found no problems with them whatsoever. In fact I have found them to be faster to put on then standard patches, and not have to find a dried out glue tube. Since I switched to Armadillo tire though I have not used a patch in 3 years. I am not sure if the glueless patches dry out or not so next week I will buy new ones to replace the 3 year old ones just to be safe; but for 3 bucks who cares?