Slime Sealant 8oz. No more flats! Slime Tube Sealant seeks out and instantly seals tread area punctures up to 1/8″ (3mm). When a puncture occurs Slimes patented sealant is carried directly to the puncture. The pressure of the escaping air forces the particles into the opening where they build up and intertwine to form a long-lasting flexible plug. Instantly air loss is blocked and a flat tire is prevented. Install in your bicycles dirt bikes wheelbarrows riding mowers and more and enjoy two years of continuous flat tire protection.