OTR Heavy Duty Hybrid Antifreeze/Coolant Concentrate ensures Expertise Built In™, having a combination of nitrite and molybdate additives to provide premium wet sleeve liner cavitation protection. This heavy duty antifreeze/coolant has an exceptional quality global Hybrid Organic Acid Technology (HOAT) virgin ethylene glycol-based fluid that is specifically made with industry-leading additives to offer maximum performance. FleetPride is your First Click in Heavy Duty®.