Pentofrost A2 is a phosphated organic acid technology (phosphated OAT); which is categorized as HOAT (hybrid organic acid technology) in the US market. Pentofrost A2 is suitable for all Asian vehicles using ¿¿¿¿¿¿¿green¿¿¿¿¿? Antifreeze/Coolant. Pentofrost A2 does not for Asian vehicles. Pentofrost A2 is mixable with all phosphated OATs. Meets ASTM D-3306.Pentofrost A2 is an antifreeze PRE-DILUTE for Asian vehicle applications in water-cooled engines. Do not mix with water. It contains phosphates and organic salts to protect all materials used in cooling systemscontain any silicate, borate, nitrite or amine containing additives since these may harm your Asian vehicle. Do not mix with other coolants (especially silicated coolants), as this may cause gel formation and clog your radiator.