Penrite Purple OEM Coolant Premix is a genuine Glysantin G65, OEM Approved Coolant(Original Equipment Manufacturer), fully licensed and warranty approved, Type “A” Ethylene glycol, Anti-Freeze, Anti-Boil coolant as used for factory fills. Using the latest advanced PSi-OAT (Phosphate and Silicate Organic Acid Technology) based inhibitor system, it’s idea for modern “downsized,” high power density, hotter running engines being used in the latest generation of passenger cars as well as many other engines. Formulated to meet strict European EHS regulations, this advanced formula provides improved tolerance for flux-brazed aluminium heat exchanges. Penrite Purple OEM protects all internal surfaces from corrosion, including cast iron, aluminium, copper and solder alloys as well as the hoses, seal and plastics used in the cooling system.