VP Racing madditive cool down is a coolant additive designed to reduce engine running temperatures by up to 24 degrees C (75 deg F). Cool down is safe for all automotive applications and can simply be added to your existing coolant.Reduces temperatures by up to 24 degrees C (75 deg F)Can be used in all automotive cooling systemsIdeal for race, street or tow vehicles which run hotter than usualCool down is formulated to increase heat transfer from cylinder heads and allow for increased coolant flow. It can be added in any coolant system to reduce engine temperatures and will last up to one year or 30,000 miles before re-treatment is required.16 oz bottle treats a coolant system up to 19 litres. When adding to straight water it is recommended that 50% more cool down is required.