Product Short Description: Safe scale Cleaner with end point colour Indicator Product Description: Safe scale Cleaner with end point colour Indicator. Low Foaming Solution. Safely removes scale from cooling towers, pipes, Boilers, Calorifiers, Heat exchanges, diesel engine cooling system, Condensers, Evaporators & other types of equipment where rust & scale form without system shutdown It Effectively Removes Scale, Heavy Slime and Algae from surface. RXSOL 555 is an inhibited phosphoric acid descaler which is much safer and non-fuming. Also safe on paint.