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Fluxes

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.


Fluxes for soft solders for industrial use(non-electronics):

Plumbing, automotive and industrial applications, among others, typically use an acid-based flux which provides cleaning of the joint. When joining Stainless Steel to any other metal, an acid flux must be used.  Our acid based Fluxes are the #22 and #75 These fluxes cannot be used in electronics because they are conductive and because they will eventually dissolve the small diameter wires. 


Fluxes for soft solders for use with electronics are currently available in three basic formulations:

Water-soluble fluxes - higher activity fluxes designed to be removed with water after soldering like the #30 Flux.

No-clean fluxes - mild enough to not "require" removal due to their non-conductive and non-corrosive residue. These fluxes are called "no-clean" because the residue left after the solder operation is non-conductive and won't cause electrical shorts; but they can leave a white of clear residue. These residues can be removed with alcohol

Traditional rosin fluxes - available in non-activated (R) #97, mildly activated (RMA) #99 and activated (RA) #100 formulations. RA and RMA fluxes contain rosin combined with an activating agent, typically an acid, which increases the wettability of metals to which it is applied by removing existing oxides. The residue resulting from the use of RA flux is corrosive and must be cleaned. RMA flux is formulated to result in a residue which is not significantly corrosive, with cleaning being preferred but optional.


 

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 and 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!

Sections In Fluxes

Brazing Fluxes
We have a full range of Brazing Fluxes from Superior Flux                           &...
FireScoff
Revolutionary spray ceramic coating that prevents oxidation and scale, acts as a flux, and features easy removal with just warm water.
Flux Pens
We have flux pens for all your rework needs.
Rosin Fluxes
Rosin Fluxes

Products In Fluxes (Total Products 19, Showing: 1 -> 19)
Sort By: Product Code | Product Name | Price Low to High | Price High to Low

Flux - Acid #22, 1 Gallon
Inorganic Acid Flux used for soldering Copper and Brass. Active between 200 ºF....
$51.29
Flux #30, 1 Gallon
Water based supersafe non-hazardous general purpose flux. Used for tinning and o...
$50.38
Flux  #40MM4, 1 Gallon
Water based non-hazardous VOC free organic acid flux. It is excellent for difficult to...
$49.75
Flux - Acid #75, 100ml
Inorganic Acid Flux used for soldering Ferrous Alloys and Stainless Steel. Great f...
$7.95
Flux - Acid #75, 1 Gallon
Inorganic Acid Flux used for soldering Ferrous Alloys and Stainless Steel. ...
$59.31
Flux - Acid #75, Dispensable, 10cc Syringe
This is a dispensable version of the very popular #75 Flux. It can be shipped non-hazm...
$16.00
CHIP QUIK  SMD291 No Clean Flux - 10cc
CHIP QUIK® SMD-291 No Clean Flux in 10 cc. Syringe with Nozzle The same flux u...
$14.70
CHIP QUIK  No Clean Flux Water Washable
CHIP QUIK® SMD-4300TF10  No Clean Flux Water Washable in 10 cc. Syringe with Nozzle ...
$14.92
CHIP QUIK SMD291 No Clean Flux - 30cc
CHIP QUIK® SMD-291 No Clean Flux in 30 cc. Syringe with Nozzle The same flux u...
$36.75
CHIP QUIK SMD291 No Clean Flux in 2cc Squeeze tubes
CHIP QUIK® SMD-291 Tack Flux 6 Pac - Squeeze Tubes - No Clean packaged in conv...
$14.62
Flux #30, 1 Pint
Water based supersafe non-hazardous general purpose flux. Used for tinning and oth...
$13.50
Flux #71 Flux High Activity for Stainless Steel - 4 Oz
 Formulated for soldering Stainless Steel and High-Chrome Alloys. ...
$8.25
Flux #71 Flux High Activity for Stainless Steel - Pint
 Formulated for soldering Stainless Steel and High-Chrome Alloys. ...
$15.95
Flux - Aluminum Solder #1260, 1/2 lb
Superior No. 1260 is formulated for low temperature soldering of aluminum and aluminum alloys. I...
$24.00
MG Chemicals 8341 No Clean Flux Paste in Syringe
Convenient syringe dispenser ideal for touch up and repair of surface mount assemblies.  ...
$10.45
RubyFluid
Superior RubyFluid is a water-solub...
$4.00
SRA TF5000 No Clean Tacky Flux - 10cc
NEW Product:  2 Years in Development!! A No Clean Tacky Flux that is lo...
$10.00
Sybergel  Repair Flux and Cleaner in a 10cc Syringe
Unique water-soluble flux+cleaner.  Ideal for PCB repair and rework.  Simultaneously c...
$12.50