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 under-inflation caused by slow leaks and punctures. MULTI SEAL is proven to seal punctures up to ¾” with our PRO HD 2500™ and 1 ¼” with our Armor 3500™, 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 Sealant™.