MULTI SEAL is the world leader in superior tire sealant technology. Since 1981 MULTI SEAL has produced high performance tire sealants, scientifically formulated to prevent underinflation caused by slow leaks and punctures. MULTI SEAL is proven to instantly seal punctures up to 1 ¼” increasing safety for operators and equipment. Using MULTI SEAL inside heavy industrial tires significantly boosts ROI through savings on repair and reduced downtime. Superior Science. Superior SealantTM.