Equip your semi truck to be Ready for the Road Ahead , with the X-tra Seal Premium Tire Mounting Compound, a fluid compound that plays a key role in the sealing, protection, and mounting of tires. Due to its specialized formula, this concentration is able to create an airtight seal between a tire bead and rim. Blended with a multipurpose formula to be suitable for a wide range of tires. FleetPride is your First Click in Heavy Duty .