Check the listing for details. Pentosin 8115207 Pentofrost A3 Prediluted Engine Coolant. Condition: New. Listed at 35.83 USD. Pentofrost™ A3 Prediluted Engine Coolant (8115207) by Pentosin®. Volume: 1 Gallon. Type: HOAT. Color: Blue. Long-Life. Pentofrost A3 is a phosphated organic acid technology (phosphated 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. Pentofrost A3 does not contain any silicate, borate, nitrite, or amine 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. Pentofrost A3 is a PREDILUTED antifreeze for Asian vehicle applications in water-cooled engines. It contains phosphates and organic salts to protect all materials used in cooling systems for Asian vehicles.