Viscol Antifreeze is a high quality product containing anti-corrosion additives and inhibitors. The additives are collectively known as Inorganic Additive Technology (IAT) and the resultant antifreeze is coloured a yellow/ green translucent colour. It reduces the freezing point of the cooling water and increases the boiling point. The anti-corrosion additives give protection to Aluminium, copper, cast iron and other metals used in cooling systems.