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Safe water soluble flux for creating strong and leak free joints with all lead free and common soft solders. Water-soluble for faster rinsing from pipelines Contains no zinc chloride to reduce corrosion concerns Non-acid, non-toxic, and lead-free to eliminate safety concerns Safe for use on plumbing and gas services - will not progressively pin-hole pipes. WRAS approved For use on copper, brass, galvanised iron, lead, zinc, tin, silver, nickel, mild steel, terne plate, and malleable iron Please note this is an age restricted item, ID will be required upon collection or Delivery