Yes it does thats one of the key factors of it or else I wouldnt have considered it.,
"An absolute must for reducing the strain of running vehicle air-comditioning on hot days. Suitable for both petrol or diesel vehicles and trucks. Especially recommended for race engines! It also provides year round protection to reduce rust, corrosion and electolysis—passing the most severe Simulated Service Corrosion test developed for automotive coolants determined by the ASTM committee. It also reduces cavitation and air pockets; cleans and lubricates water pump seals; prevents foaming; complexes with hard water to reduce scale. "