A complete washing compound, Polykleen VAP 200-R which is a powder substance that contains an effective surface active agent that provides the all-important wetting action to effect fast and complete softening of tough calcium oxalate scale-complex normally deposited on the evaporator tubes. The very soft scale is then readily floated away by hose rinsing or by light brushing operation. Polykleen VAP 200-R is an excellent replacement for caustic soda in sugar juice evaporator cleaning. It also has an AntiCorrosion compound.