Servo ANTICORR is a water based coolant.It has an additive system based on organic acids.That system protects all six metals copper, brass, steel, cast iron , aluminum and solder from corrosion. It does not contain amines, phosphates, borate and silicates.It gives excellent engine efficiency because of the supreme cooling and corrosion protection property. 2.5% volume is diluted with distilled water for better performance.