Soft Soldering Fluxes

JO FLUX® offers Soft Soldering Fluxes for different metals and soldering applications. The range includes Soldaflux Stain Steel, Flxal-S Gel / Liquid, and Soldaflux. These products are available in paste, gel, liquid, and semi-fluid forms. Their activity ranges cover 160°C to 350°C, with each flux made for specific metals, filler alloys, and soldering conditions. The right product depends on the base metal and the working temperature of the filler alloy.
 

Soft Soldering Flux for Different Metals

The range includes fluxes for stainless steel, carbon steel, copper, brass, aluminium, and aluminium alloys. Each product has a different application area and temperature range.
 

The three products include:
 

  • Soldaflux Stain Steel: 165–350°C

  • Flxal-S Gel / Liquid: 160–325°C

  • Soldaflux: 165–350°C

These options allow users to select a flux based on the metal and the soldering process.

 

Soldaflux Stain Steel for Steel and Copper Alloys

Soldaflux Stain Steel is a semi-fluid soldering paste flux for stainless steel, carbon steels, and copper-based alloys. It can be used with flame and induction heating soldering.

Product Features and Use

The flux has an activity range of 165–350°C. Its highly reactive formulation dissolves the chromium oxide layer and helps improve wetting of the soldering alloy.
 

Key details include the following:

  • Suitable for stainless steel

  • Suitable for carbon steels

  • Suitable for copper-based alloys

  • For flame and induction heating soldering

  • For tin-lead and tin-silver soldering group alloys

  • Available in 500 g and 1,000 g packaging

Flxal-S Gel / Liquid for Aluminium

Flxal-S is a low-temperature soft soldering flux available in gel and liquid forms. It is made for aluminium and aluminium alloys and has an activity range of 160–325°C.
 

The product can be used for:

  • Aluminium to copper

  • Aluminium to brass

  • Aluminium to plated terminals

  • Aluminium radiators and condensers

  • Aluminium wire to copper wire

It can be used with a soldering gun, flame, furnace, and dip soldering. The gel form is suited to aluminium radiators and condensers, while the liquid form is used for dip soldering of aluminium wire to copper wire.
 

Soldaflux Liquid Soldering Flux

Soldaflux is a liquid-type soldering flux made for copper and brass radiators and heat exchangers. It has an activity range of 165–350°C.
 

The product offers:

  • High activity

  • Non-chelating formulation

  • Less corrosive flux

  • High temperature stability

  • Less smoke and odor

  • Use with tin-lead and tin-silver soldering group alloys

Soldaflux is supplied in 20-litre and 50-litre polyethylene containers, making it an option for applications that need larger pack sizes.

 

Soft Soldering Flux Manufacturer

JO FLUX® provides different soft soldering fluxes for specific metal and process needs. The range includes paste, gel, and liquid products, with activity ranges from 160°C to 350°C.

Flux residue cleaning also varies by product. Soldaflux Stain Steel and Soldaflux can be cleaned by rinsing with cold water followed by brushing under hot water. Flxal-S residues can be removed with hot water, while methyl or isopropyl alcohol can be used where water cannot be used.

This range gives users a focused choice of Industrial Soldering Flux for steel, copper, brass, aluminium, and related applications.