Slime Tube Sealant is formulated and tested for use in all tube tires. Once installed, Slime remains liquid and will not harden or dry out. Slime is guaranteed for 2 years. As the Slime treated tube rotates, centrifugal force pushes the sealant to the tread area creating a layer of protection, repairing punctures as they occur and treating existing punctures. Slime is not intended for use in tubes losing pressure from sidewall punctures, bead leaks, damaged rims or faulty valves. Slime for tube type tires is NOT recommended for use in tubeless tires.