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The purpose of flux is to facilitate the soldering process. The main obstacles to a successful solder joint is an impurity at the site of the joint consisting of dirt, oils or oxidation. The impurities can be removed by mechanical cleaning or by chemical means, but the elevated temperatures required to melt the filler metal (the solder) encourages the work piece (and the solder) to re-oxidize. This effect is accelerated as the soldering temperatures increase and can completely prevent the solder from joining to the work piece. Some fluxes go beyond the simple prevention of oxidation and also provide some form of chemical cleaning (corrosion).

For many years, the most common type of flux used in electronics (soft soldering) was rosin-based, using the rosin from selected pine trees. It was ideal in that it was non-corrosive and non-conductive at normal temperatures but became mildly reactive (corrosive) at the elevated soldering temperatures.

Fluxes also act as a wetting agent in the soldering process, reducing the surface tension of the molten solder and causing it to flow and wet the workpieces more easily.

Description Specification Flux
Copper and Brass Soldering J-STD-004 1NH1 #22
A Proven safe choice for copper, brass and nickel    J-STD-004 1NH1    #30
Organic Acid Flux for badly oxidized leads (similar to #30 but more active)   J-STD-004 ORM1 #40MM4  
Stainless Steel Soldering Flux ( Super Active) J-STD-004 1NH1 #71
Stainless Steel Soldering Flux  J-STD-004 1NH1 #75
Stainless Steel Soldering Paste Flux  J-STD-004 1NH1 #75 Paste
Aluminum Soldering Flux (Honey Flux) n/a # 1260
Soldering Flux for Stained glass, roofing and hobbyist ( low cost) J-STD-004 1NH1 RubyFluid Flux 
Soldering Flux for Stainless Steel and hobbyist ( low cost) J-STD-004 1NH1 RubyFluid Flux SS 
PCB Repair, Cell Phone Repair J-STD-004 ORM0 SyberGel
Wave Soldering Flux: Water Soluble J-STD-004 ORM1 #80

Wave Soldering Flux: No-Clean, Alcohol Based for Lead-Free & Leaded Solders 

J-STD-004 ORM0 325
Wave Soldering Flux: No-Clean, VOC Free for Lead-Free and Leaded Solders  J-STD-004 ORM0 #420F-LF
Rosin Liquid Flux (Type R) J-STD-004 ROL0 MIL-F-14256 Type R   #97
Rosin Liquid Flux (Type RMA) J-STD-004 ROL1 MIL-F-14256 Type RMA  #99
Rosin Liquid Flux (Type RA) J-STD-004 ROM1 MIL-F-14256 Type RA #100
Rosin Tacky Flux - Water Soluble J-STD-004 ROL1 MIL-F-14256 Type RMA #8600
Rosin Paste Flux for Electronic and Electrical Repairs J-STD-004 ROL1 MIL-F-14256 Type RMA #135


We have a full range of soldering and brazing fluxes including the popular fluxes from Superior Flux Company.  If you need help choosing the correct please contact us!

  1. Part No:TF5000-30CC
    A No Clean Tacky Flux that is lower in odor and tackier than anything else on the market.
  2. Part No:FLSR8600
    It is a dispensable Rosin tacky flux that can be easily washed with water.
  3. Part No:SSYBERGEL

    SyberGel Flux and Cleaner is a revolutionary, dual purpose product for manual soldering applications.

  4. Part No:TF5000-2CC-6
    A No Clean Tacky Flux that is lower in odor and tackier than anything else on the market.
  5. Part No:TF5000
    A No Clean Tacky Flux that is lower in odor and tackier than anything else on the market.
  6. Part No:MG8341-10ML
    MG Chemicals 8341 No Clean Flux Paste in Syringe
  7. Part No:MG8342-50G
    8342 RA Rosin Flux Paste superior electronic grade flux paste system that makes SMD electrical and electronics soldering faster and easier.
  8. Part No:FLS130
    Please contact us for Stock Details
    Acid Paste Flux #130 in a 2 oz Jar
  9. Part No:FLS141
    Water Soluble Plumbing Paste Flux #141
  10. Part No:SALAMMONIAC-100G
    Sal Ammoniac Block - 100 Grams
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