Soldering Flux, 1630, Water-Soluble, Inorganic Acid, 5 Gallons
The Kester 1630 is a bromide-based, chloride-free, inorganic salt activated flux containing less than 1% free acid. 1630 is an excellent flux for soldering copper, brass, and all types of tin-based solders, from low tin to lead-free solders. 1630 has a bromide activator that will not turn copper or brass green during normal soldering operations. 1630 is also used for soldering nickel and mild steel. 1630 was developed for soldering electrical connections like fuses, and can be used to solder all copper-based alloy joints. The inorganic salt activation system gives 1630 great heat stability over a long period of time using a wide variety of heating techniques.