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  1. Kapp Comet Flux 2 oz Bottle
    Kapp Comet Flux 2 oz Bottle
    Low temperature 350-550°F / 177-288°C flux for all metals except Aluminum - 2 oz Bottle VIEW PRODUCT
  2. Kapp Comet Flux 6 oz Bottle
    Kapp Comet Flux 6 oz Bottle
    Low temperature 350-550°F / 177-288°C flux for all metals except Aluminum - 6 oz Bottle VIEW PRODUCT

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Kapp Comet™ Flux has been designed specifically for the low temperature soldering of all common metals except Aluminum. It is an activated liquid flux, a mixture of inorganic salts in water, with approximately 35-40% active ingredients and excellent wetting properties. Kapp Comet™ Flux is highly recommended for use with KappZapp™ Silver solders on Copper and Stainless Steel. It is also excellent for use with all solders and metals except Aluminum when soldering temperature requirements are 350-550°F (177-288°C). Kapp Comet™ Flux is designed specifically to work with KappZapp3.5™ and KappZapp4™ solders to remove the oxide layer on Copper, Brass, and Stainless Steel required to form a strong solder bond.


  • Best used in applications suited for KappZapp3.5™ and KappZapp4™ solders such as:
    • Sensitive electronic parts
    • Circuit boards
    • Thin wires
    • Instruments
    • Copper wires to Copper, Brass, and/or Stainless Steel tabs
  • Effective fluxing action on metal surfaces is 350-550°F (177-288°C)
      • Choose CopperBond™ Flux for higher soldering temperatures on Non-Aluminum Metals
        • IMPORTANT: Overheating Kapp Comet™ Flux will be detrimental to your soldering project. Kapp Comet™ Flux will char above 550°F (288°C) requiring you to stop, let the joint cool, clean the joint, and re-solder to ensure a proper bond.
          • Residue is slightly corrosive, and easily removed with hot water rinse, or a clean wet rag


          The following chart represents the physical properties of Kapp Comet™ Flux. Many factors, such as materials, temperature, and method of application determine the most effective flux. Call Kapp for engineering assistance to discuss your specific needs. We recommend testing appropriate fluxes in your specific application to ensure suitability.


          Technical Data

          Active Temperature Range:

          350-550°F (177-288°C)

          Specific Gravity:

          1.387 @ 70°F (21°C)


          Clear liquid, slight yellow color, no odor


          Soluble in water


          Slightly Alkaline


          Mildly corrosive to Steel and soldered joints

          Flash Point:

          71°F (22°C) – TCC

          Weight Per Gallon:

          11.6 lbs. (5.3 kg)

          Shelf Life:

          1 year unopened at ambient temperature


          Convenient 2 oz. and 6 oz. dispenser bottles;

          ½ gallon and 1 gallon bulk bottles

          *Note: Flux is rated by D.O.T. as a Corrosive Hazard - Can Not be shipped by Air


          Product Variants

          • 2 oz. bottle
          • 6 oz. bottle
          • ½ gallon jog
          • 1 gallon jug


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          Click here for Kapp Comet™ Flux Technical Data Sheet

          Click here for Kapp Comet™ Flux Safety Data Sheet

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