OTR Heavy Duty Hybrid Antifreeze/Coolant 50/50 Premix ensures Expertise Built In™, being a mixture of molybdate and nitrite additives that offers exceptional wet sleeve liner cavitation protection. This heavy duty antifreeze/coolant has a superior quality global Hybrid Organic Acid Technology (HOAT) virgin ethylene glycol-based fluid that is uniquely formulated with industry-leading additives to provide optimal performance. FleetPride is your First Click in Heavy Duty®.