All Weather Super Detergent Action Cleans As It Solders. Non-Acid Non-Toxic Lead Free. Contains No Zinc Chloride. Use With All Common Soft Solders Including: Tin-Silver 96/4 94/6 95/5 50/50 40/60 And 60/40 61 For Use With Potable Water. Water Soluble For Faster Flushing From Pipe Lines