Flat Free Tire Sealant provides full time protection against air loss for the life of your small tires. Flat Free Tire Sealant can help save you time and money by preventing costly flats coupled with expensive downtime and repair costs. It is installed quickly and easily through the valve stem. Applications include wheelbarrow tires, hand truck tires, lawn mower tires, roofing tires, etc. Not for automobile or other hi-speed tires.