Pentofrost A3 is a phosphate organic acid technology (phosphate OAT); which is categorized as HOAT (hybrid organic acid technology) in the US market. Pentofrost A3 is suitable for all Asian vehicles using blue Antifreeze/Coolant. A3 does not contain any silicates, borates, nitrites, or amine containing additives since these may harm your Asian vehicle. Do not mix with other coolants (specially silicate coolants), as this may cause gel formation and clog your radiator. Pentofrost A3 is a PRE-DILUTED antifreeze for It contains phosphates and organic salts to protect all materials used in cooling systems for Asian vehicles. Pentofrost A3 is mixable with all phosphate OATs. Meets ASTM D-3306.