The D/ISHA4 is a concentrated all year round protection anti-freezing liquid type with low freezing point, designed for all engine types including full-aluminium ones. This D/ISHA4 S Hook 4.5 litre blue liquid protects the cooling systems against damage by freeze to -36deg;C and corrosion. Also the S Hook D/ISHA4 will keep you car cooler in summer months, so getting all year round protection for a great low price. Antifreeze blue is the optimum composition of top grade ethylene glycol, combined with treated, de-mineralized water and high-performance additive package that prevents formation of rust and scum. The S Hook antifreeze will protect and help to prolong the pump bearing service life, prevent water pump seizure and other rubber parts of the cooling system from dry out and cracking. D/ISHA4 Antifreeze blue is notable for its high heat-transfer capacity, low viscosity, excellent detergency. 4.5 litrePasses BS6580 1992.