Superior Flux

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Stainless Steel Soldering Flux

Superior Flux offers a full range of Inorganic Acid, Zinc Chloride stainless steel soldering fluxes. Zinc Chloride fluxes are ideal for soldering stainless steel, brass, copper and other hard-to-solder base metals.

Superior
Flux
Number
Description Rec.
Solders
Rec. Temp Ranges Specs. MSDS Spec. Sheet
No. 75 General Purpose Liquid Solder Flux Tin-Based; Lead-Free or Lead-Bearing

95-345°C

200-650°F
O-F-506C, Type 1, Form B Superior Flux MSDS Superior Flux Spec.
No. 71 High Activity Stainless Steel Liquid Flux Tin-Based; Lead-Free or Lead-Bearing

95-425°C

200-800°F
O-F-506C, Type 1, Form B Superior Flux MSDS Superior Flux Spec.
No. 79 Acid-Free Liquid Solder Flux Tin-Based; Lead-Free or Lead-Bearing

95-315°C

200-600°F
N/A Superior Flux MSDS Superior Flux Spec.
No. 78 Gel Solder Flux – Water-Soluble Tin-Based; Lead-Free or Lead-Bearing

95-425°C

200-800°F
N/A Superior Flux MSDS Superior Flux Spec.
No. 144 Paste Solder Flux – Water-Soluble Tin-Based; Lead-Free or Lead-Bearing

105-345°C

220-650°F
N/A Superior Flux MSDS Superior Flux Spec.

All stainless steel soldering fluxes are RoHS compliant.

Superior No. 75 is an excellent, General Purpose soldering flux for stainless steel and other alloys.  Due to the activity of this inorganic acid flux, pre-cleaning of joints is often not necessary.  Superior No. 75 contains Zinc Chloride, Ammonium Chloride and Hydrochloric Acid.

Superior No. 71 is a high-activity Zinc Chloride flux formulated for situations where a general-purpose soft soldering flux is not strong enough or for badly oxidized or difficult-to-solder metals like stainless steels, Monel, High-Chrome alloys and Inconel. No. 71 contains Zinc Chloride, Ammonium Chloride, Hydrochloric Acid and a bifluoride.  Bifluorides etch glass and should not be used on parts where glass etching will be an issue.

Superior No. 79 is an Acid-Free flux formulated for stainless steel and high-chrome alloys.

Superior No. 78 is a gel form General Purpose acid flux. Due to a high viscosity, the gel flux does not migrate upon heating, providing a more restrictive solder flow.

Superior No. 144 is a unique Water-Soluble paste flux.  This soldering flux was specifically formulated for soldering stainless steel, copper and copper-alloy tubes.  It is also an excellent choice for copper pipes used in HVAC, mechanical and fire sprinkler systems.

Learn about our full line of Industrial Soldering Flux
Ask about our Private Label Flux Program.
Learn about our Zinc-Free Soldering Flux and our full line of Plumbing Flux.