Blue OEM Approved Coolant Premix is a GENUINE GLYSANTIN G30 Original Equipment Manufacturer (OEM), Fully Licensed and Warranty Approved, Type 'A' Ethylene glycol, Anti-Freeze Anti-Boil as used in initial manufacturer factory fills. It uses a technically advanced OAT (Organic Acid Technology) based inhibitor system that is Silicate, Phosphate, Amine, Borate and Nitrite free. The extended long-life inhibitor formulation prevents rust, corrosion, cavitation and degradation of the cooling system.