The Fleetguard Cavitation Preventive Coolant Additive Bottle is designed to protect vital engine components from cavitation and corrosion in diesel engine cooling systems. This bottle provides a sufficient amount of additive to add to the cooling system, helping to ensure that your engine is running at its best. The additive helps to reduce cavitation and corrosion, helping to extend the life of your engine and keep it running smoothly. FleetPride is your First Click in Heavy Duty®.