Description Premium Heavy-Duty Tire Sealant. A preventative maintenance chemical for commercial and industrial tires that are subject to hard, heavy use. Will virtually eliminate flat tires from tread punctures (up to 1/4") or other leaks. Properly installed in a tire, it will provide full protection against air loss for the life of the tire. The chemical make up allows it to always stay fluid (down to 30 deg. below zero) so that it immediately seals any tread punctures or leaks where air can escape from the tire.