Fiber gel sealant for inner-tubes (not for tubeless system). Contains micro-fibers to prevent punctures in the tread up to 3 mm. Non-toxic, Long lasting and easy to install. Easy to use spout fits into all valves. For effective puncture resistance, add fresh sealant every 12 months. If you get a puncture, always SPIN the wheel to distribute the sealant. Recommended Amount for 1 26" or 29" inner-tube: 120 ml. 240 ml bottle is good for 2 bicycle wheels and 5 liter jerrycan is good for approximately 42 wheels.