Servokool NFSC is an engine coolant concentrate based on ethylene glycol and is free from nitrites, amines and phosphates but contains silicates. It is compatible with hard water and provides excellent protection to ferrous and non ferrous components against corrosion and frost damage. It meets MAN 324 specification. For best performance 33-50% by vol. of the concentrate should be mixed with tap / potable water before filling into the system.