Soudotec TBW Zinal 4 - Dissimilar Metal - Flux Core Brazing Rod

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Soudotec TBW Zinal 4 - Flux Core Brazing Rod


For low temperature soldering / Brazing of aluminum and its various alloys, aluminum to copper and aluminum to steel.

Zinc-aluminum extruded tubular flux-cored rod containing a non corrosive flux for low temperature soldering / brazing.

  • No other flux required
  • Low bonding temperature
  • Easy and quick application
  • Less risk of deforming the base metal
  • No post-braze cleaning required
  • High fluidity and good wettability
  • Bonding temperature: 440 - 460ºC (824 - 860ºF) 


Dissimilar assemblies including brazing aluminum to steel. Heat exchangers, refrigeration and brazing of air-conditioning systems, aluminum condensers, radiators, aluminum pipe fittings, etc. Not made for aluminum-magnesium alloy. 


  1. Degrease & Clean the aluminum joint surface with stainless brush
  2. Mechanically remove scale & rust & Degrease the steel joint surface 
  3. Using an open flame torch. Preheat the joint area to around 800 F focusing the heat on the thicker member
  4. Test the soldering temperature by introducing the rod in the joint surface area.  When rod melts and flows into the joint, then soldering temperature range has been reached 
  5. Start soldering by adding more filler material as it melts into the joint.  Be careful not to overheat the area by moving the flame point away & into the joint area intermittently 
  6. Cool slowly
  7. Clean flux residue with warm water & brush

    Available Sizes:

    • 0.045" (1.2 mm) - 250 grams (1/2 lb) - TBWZIN4K.12
    • 1/16" (1.6 mm) - 250 grams (1/2 lb) - TBWZIN4K.16
    • 3/32" (2.5 mm) - 250 grams 1/2 lb) - TBWZIN4K.32