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Kjellberg Root Flux

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Kjellberg Root Flux

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The root flux is applied to the root side (some 2 mm thick) before welding; protects against welding-related oxidation.


  • Designed for the TIG welding of low-alloy and stainless steels (nickel content max. 20%).

  • Not a substitute for protective gas – to be used when gas is not applicable.

  • Protects the root side but is not equivalent to an argon-protected root side.

  • Removes oxide inclusions and exhaust oxides during welding.

  • Can replace protective gas (if the application does not permit gas protection on the root side), tape and ceramic backing.

  • Acts as a backing by distributing heat evenly below the weld.

  • Chemical function removes impurities from weld pools.

  • Supplied as a powder – mix with industrial alcohol (methanol, ethanol) or distilled water prior to welding, three parts powder to two parts liquid.