​Organic technology ensures a long-term action ta offer maximum protection against any type of corrosion, erosion and cavitation, even at high temperatures.The organic additives in COOLELF AUTO SUPRA -20°C give ta the coolant:- Chemical neutrality (pH7-8.5). - A reserve of alkalinity ta neutralise the acids resulting from the combustion gases.-Resistance ta foaming.-Compatibility with hard water (maximum 40°F). Avoids formation of deposits (no risk of limescale) and leaves surfacesclean.