Pentofrost A1 is a phosphated organic acid technology (phosphated OAT); which is categorized as HOAT (hybrid organic acid technology) in the US market. Pentofrost A1 is suitable for all Asian vehicles using ¿¿¿¿¿¿¿red¿¿¿¿¿? Antifreeze/Coolant. Pentofrost A1 does not contain 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 ge formation and clog your radiator. Pentofrost A1 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 systems for Asian vehicles. Pentofrost A1 is mixable with all phosphated OATs. Meets ASTM D-3306.