NALCOOL 2000 should be introduced during circulation of the cooling water. NALCOOL 2000 is best added by means of a feeder installed on a by-pass to the circulating system or, in smaller systems, it can be added directly to the header tank.
Initial treatment is at a rate if 1 litre of NALCOOL 2000 per 32 litres of coolant. Thereafter, the procedures are as follows: