Anyone who has been caught unprepared by a flat tire will appreciate this preventative measure. When a puncture or leak happens, the sealant flows into the breach and the combination of liquid and fibers stops the leak within one revolution of the wheel. The rest of the mixture remains in the tire, so a single treatment can seal multiple punctures. Not only does this save you from having to find the leak and apply a patch, the minimal air loss means less interruption to work or travel. The sealant also stops gradual bead leaks and porosity leaks.