Brazing Aluminum Through Oil, Paint, and Dirt


An aluminum air conditioning return loop is welded with Super Alloy 5 aluminum rod and flux. Notice the filler rod’s perfect color match in comparison with the parent metal–you cannot see the difference.



  • While it is not necessary to pre-clean the aluminum before making the repair, a clean part will  decrease the amount of flux needed.
  • Notice the technique: As soon as the rod began to flow, the heat is removed very quickly to avoid overheating the base metal.
  • Turn down the oxygen when working on thin aluminum parts.


NotePlease observe all AWS Safety & Health Guidelines when using Muggy Weld products.