My last ride my rear tire hit something and I heard a noise like air escaping I stopped and looked and the slime was on a small area and no more air was coming out I finished my ride another 3 or 4 miles no problems. At home checked pressure tire had lost about 10/15 lbs but was holding at 45lbs. I added more air to 60lbs and rode today 17miles dirt track. No loss of air.