Nokorode regular paste flux is an all purpose, soft soldering paste flux ideal for use with 95/5 and other common solders. Nokorode paste flux for soldering has a smooth solder paste flux consistency, making it easy to apply. Soldering paste flux does not contain lead or acid; will flux and clean, saving time and money. Nokorode Paste Flux; safe on potable water systems. Lead and acid free; acid brush included under paste flux lid. Can be used on all solderable metals including copper, tin, zinc, nickel, and sheet lead. Not for use on stainless steel, aluminum, or magnesium. Not recommended for electronic use. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.