The Flux 028 paste range contain non-corrosive controlled atmosphere brazing (CAB) flux, Flux 2805 with an organic carrier system.  This product can be enhanced through flux and/or cesium content along with viscosity.

Physical Properties

  • Appearance: White paste
    Boiling Range: 184 -189°C
    Melting Range: 420 -560°C
    Odor: Neutral
  • CAB Flux

    K 29-34%
    Al 14-17%
    F 47-52%

    Cs Complex

    Cs 53-62%
    Al 7-12%
    F 28-38%


Non-Corrosive-Flux-Pastes are classified as an irritant according to current regulations.

Observe usual chemical handling precautions

Please see Safety Data Sheet (SDS) for additional product specific information.


Plastic containers 1kg, 2kg, 6kg, 8kg and 18kg net weight.

Typical Product Type

  • Product Type Typical Product Name Comment
    CAB Flux Flux 028/55 High concentration fluxing of braze joints
        Flux 028/60 High concentration fluxing of braze joints
    Cs Enhanced CAB Flux Flux 028/55 Cs2 Used for materials with moderate magnesium or copper content.
        Flux 028/60 Cs4 Used for materials with moderate magnesium or copper content.
    Cs Complex Flux 028 Cs/D Used for materials with high magnesium or copper content.  Use for low temperature flame braze in conjunction with AlZn filler wire.

FLUX 028

FLUX 028 flux pastes contain Flux 2805 non-corrosive flux as the active component.  Cesium complex is added to some variants.  The cesium is very effective at managing high magnesium and high copper content in aluminum alloys used.  These paste can also be enhanced with a UV marker.

The cesium complex component is active at the same temperature range as the magnesium and copper in modern aluminum alloys.  It prevents magnesium and copper oxides from forming on the component surfaces.

The post braze flux residues are non-corrosive, they do not need to be removed or chemically neutralized.

These pastes are widely used in flame, induction and controlled atmosphere braze furnace operations.  Typically applied to braze critical joints by dispense, brush or, in some cases, by spray application.  Used in joint situations where filler metal is present in the form of a clad layer, filler metal shim or wire pre-forms.

Connector block, containing Mg, to header pipe during furnace braze is improved by applying Flux 028/55 Cs2 to the joint area.  Pipe to connector brazing is made easy by using these pastes.

Flux 028 Cs/D, in conjunction with AlZn filler wire, is especially useful for low temperature (420 oC -560 oC) flame brazing.

Products are supplied as ready for use, requiring stirring only.  No component mixing is required.

Flux 028 Pastes:

  • CAB flux (Flux 2805)
  • Organic carrier system
  • Cesium complex can be added
  • UV marker can be added
  • Process:

  • Dispense
  • Brush
  • Spray
  • Brazing:
  • Controlled Atmosphere Brazing (CAB)
  • Induction
  • Flame
  • Benefits of Flux 028 Pastes:

  • Cost competitive product
  • Non corrosive residue, no need to remove or neutralize
  • Improved process
  • Excellent braze fillet formation
  • Cesium enhanced pastes significantly improve braze-ability of Mg and Cu bearing alloys
  • Conclusion:

    Flux 028 flux pastes provide practical solutions for the application of high concentration flux to braze critical joints.  Flux Schweiß -und Lötstoffe USA, LLC is the leader in fluxing technologies and is continuously developing customer specific solutions to achieve maximum cost benefit in the processing sequence of heat exchange products.