Putoline Ultracool 12 is a high-grade, ready-to-use long life coolant (frost protection down to -37°C) for which a patented, silicate-free technology based upon carboxyl acids has been used. The product has been specially developed for cooling systems made from aluminium and copper or aluminium alloys. Ultracool 12 can also be used safely in conventional cast iron cooling systems. The use of powerful corrosion inhibitors means Ultracool 12 is practically unaffected by ageing and can be used for the entire service life of the engine. Optimal results can only be achieved with a 100% filling.