Utility Wonder UTILITY PASTE SOLDERING FLUX
The original self cleaning, lead free flux specially formulated for sweat fitting work. It removes oxidation and prepares copper, lead, brass, tin, stainless steel, cast and wrought iron for the proper bonding of solder to metal assuring leak-tight joints. It makes makes the sodler flow freely and tin perfectly. It's recommended for all soft solder work, including 95/5. Meets federal specification 0-F-506. 1/2 lb. container