BestChem Super Deionized Water which is also known as demineralized water (DI water) is water that has had its minerals removed, such as cations from sodium, calcium, iron, copper and anions such as chloride and bromide. Deionised water in laymen terms means purified process water which has most of the dissolved solids removed.

BestChem Super Deionized Water is preferable to tap water because tap water contains minerals and ions that form deposits over time on the metal surfaces of your cooling system and radiator. These deposits will reduce the heat transfer rate (which can cause overheating), the deposits also can cause corrosion of the cooling system components and reduce the efficiency and life of the coolant (anti freeze). The longer you drive your vehicle without flushing the radiator and replacing the coolant, the more likely those cooling system problems will arise, for example water pump seal and gasket failures.

BestChem Super Deionized Water should be used in the cooling system to offset the accumulation of scale and foreign matter, which contribute to overheating the engine. Also, the dissolved gasses and small amount of ionic load inherent in BestChem Super Deionized Water will help to protect your metal contact surfaces from corrosion by the water.

The safest way to refill your cooling system is to use BestChem Super Deionized Water. This should be a 50/50 mixture with coolant* for the best heat transfer.

Note: Radiator flush should be use to removes scum, oily residue, sediments, rust, deposits and other degradation products from the radiator before BestChem Super Deionized Water is used to achieve best results.

Available Packing Size:

*For Circuit & Drag users

VP Cool Down cooling system additive reduces cooling system operating temperatures by 20-50 degrees F. Reduces coolant surface tension, allows better laminar coolant flow for better heat transfer by thermal conductivity. Recommended to use with BestChem Super Deionized Water for best cooling effect on the track.