PETRONAS Paraflu 11 is a high quality, concentrated conventional coolant that optimizes the performance and durability of engine cooling system components under severe operating conditions. Manufactured using monoethylene glycol, enhanced with a corrosion inhibitor using a special inorganic acid technology with nitrites, borates and silicates (IAT technology), does not contain phosphates and amines, provides protection against overheating, frost and corrosion, as well as an aversive agent (Bitrex).