Pentofrost A2 50/50 PREDILUTED is a ready-to-use Antifreeze/Coolant for select Asian vehicles that specify 'green' Antifreeze/Coolant - just pour and go, no dilution necessary. Guaranteed to prevent lime formation, protect against corrosion and cavitation, and will never foam. Pentofrost A2 does not contain any silicate, borate, nitrite, or amine additives since they can cause cooling system damage in Asian vehicles. Do not mix with other coolants (especially silicated coolants), as this may cause gel formation and clog your radiator. Pentofrost A2 uses phosphated organic acid technology (phosphated OAT), which is categorized as HOAT (hybrid organic acid technology) in the US market. It contains phosphates and organic salts to protect all materials and components used in Asian vehicle cooling systems. Pentofrost A2 is mixable with all phosphate OATs. Meets ASTM D-3306 standards for Glycol based automotive engine coolants. Replaces OE numbers SOA868V9210, MZ311986, 999MPAF000P, 9995150000, 0023219010, 000077501E02. 1 Gallon.