Ordinary water often contains minerals which can cause scale formation and lead to a coolant system malfunction. This is why only high quality de-ionized water is used in making coolant products.
Petrovöll Subzero Radiator Coolant is strongly recommended for any type of diesel and petrol (including aluminum) engines. It is engineered to protect engine-cooling systems from corrosion all year round and also provides minimum optimum frost protection.
Petrovöll Subzero Radiator Cooland incorporates the latest and most advanced inhibitors to ensure minimum frothing and freedom from hard water scale build-up. It is compatible with all alloys, plastics, elastomers and gasket materials used in modern engine cooling systems and is "ready-to-use", no dilution required.
API / NLG ISO VG