The OTR Antifreeze/Coolant 50/50 Pre-Mix is the perfect solution for all your cooling system needs. This pre-mixed coolant is free of nitrites, amines, phosphates, silicates, nitrates and borates, making it compatible with all popular American brands of organic acid technology and conventional coolant technologies. With this product, you can be sure that your cooling system will be protected for the long haul. It is the perfect choice for all your cooling system needs. FleetPride is your First Click in Heavy Duty®.