01 / SURFACE PREPARATION
Helps Manage Oxidation
Flux helps condition metal surfaces during heating, supporting more effective solder contact with pads, terminals, and component leads.
SOLDER FLUX PASTE
LEAD-FREE • HALOGEN-FREE • NO-CLEAN
Professional flux paste designed to promote solder wetting and controlled flow during electronics soldering, micro-soldering, component work, and PCB rework.
Why Use Flux?
Better Wetting. Cleaner Solder Flow.
Flux plays an important role in electronics soldering by helping prepare metal surfaces during heating and supporting proper solder wetting and flow. PolarTronix Solder Flux Paste is formulated for professional electronics repair, microsoldering, component work, and controlled PCB rework.
02 / WETTING
Supports Solder Wetting
Proper flux application helps solder spread across prepared metal surfaces instead of remaining concentrated in an uncontrolled bead.
03 / FLOW CONTROL
Promotes Controlled Flow
Flux supports predictable solder movement around pads, terminals, leads, and other soldering areas during professional electronics work.
04 / REWORK
Designed for Rework
Useful for board-level soldering, microsoldering, component installation, connector work, and other professional electronics repair procedures.
Why Surface Condition Matters
Solder performs best when it can make consistent contact with properly prepared metal surfaces. Oxidation and contamination can interfere with wetting, making surface preparation and controlled flux application important parts of the soldering process.
Use Only What You Need
A controlled amount of flux is generally preferable to excessive application. Apply enough material to support the soldering process while avoiding unnecessary residue or buildup around the repair area.
Technical Note
Flux assists the soldering process but does not replace solder. The correct solder alloy, flux quantity, temperature, surface preparation, and technique should be selected for the specific component, PCB, and repair procedure.
Ideal Applications
Designed for Professional Electronics Soldering.
PolarTronix Solder Flux Paste is designed for controlled use across a wide range of professional electronics soldering and rework procedures where reliable wetting and solder flow are important.
01 / MICROSOLDERING
Microsoldering
Suitable for detailed board-level work where controlled flux application can support solder wetting around small pads, leads, and precision components.
02 / COMPONENT WORK
Component Installation
Useful during component installation and replacement to support consistent solder flow across prepared pads and terminals.
03 / CONNECTORS & PORTS
Connectors & Ports
A practical choice for connector and port repair where multiple solder joints require controlled wetting and reliable solder movement.
04 / PCB REWORK
PCB Repair & Rework
Designed for professional board-level repair including solder touch-up, component replacement, rework, and general electronics servicing.
Professional Soldering Material
Flux should be selected and applied according to the solder alloy, component, PCB, repair process, and intended operating conditions of the assembly.
How Flux Works
Prepare the Surface. Support the Solder.
During soldering, heat can quickly promote oxidation on exposed metal surfaces. Flux helps condition the soldering area and support the interaction between molten solder and the metal surfaces being joined.
01
Surface Condition
Helps Manage Oxidation
Flux helps condition metal surfaces during heating, reducing the effect of oxidation that can interfere with consistent solder wetting.
02
Wetting
Supports Surface Contact
Once the solder reaches the proper working condition, flux helps support contact between molten solder and prepared pads, leads, terminals, and other metal surfaces.
03
Solder Flow
Promotes Controlled Wetting
Proper flux application helps solder spread across appropriate surfaces and form more consistent joints during controlled electronics soldering and rework.
Flux Is Part of the Process
Flux works together with the solder alloy, surface preparation, temperature, and soldering technique. Consistent results depend on controlling all parts of the process rather than relying on flux alone.
Controlled Application Matters
Applying more flux does not automatically improve a solder joint. Use an appropriate amount for the work area to support wetting while limiting unnecessary residue around the repair.
Technical Note
Flux does not provide the metal that forms the solder joint. It assists the soldering process by helping prepare and condition the work area while the selected solder alloy creates the electrical and mechanical connection.
Know the Difference
Flux Paste or Solder Paste?
Flux paste and solder paste are both used during electronics soldering, but they perform different functions. Understanding the difference makes it easier to choose the correct material for the repair process.
Soldering Aid
Flux Paste
Supports the Soldering Process
- Contains
- Flux formulation
- Main Role
- Helps condition metal surfaces and supports solder wetting and flow during heating.
- Creates Joint
- No — solder is still required to create the metallic connection.
- Best For
- Microsoldering, PCB rework, component work, connector repair, and solder touch-up.
Soldering Material
Solder Paste
Provides the Solder Alloy
- Contains
- Fine solder alloy particles combined with a flux system.
- Main Role
- Supplies the solder material that melts and forms the metallic solder joint.
- Creates Joint
- Yes — the solder alloy becomes part of the completed joint.
- Best For
- Component installation, reflow soldering, PCB assembly, and controlled board-level repair.
Which One Do You Need?
Choose Flux Paste When:
You already have solder or solder wire and need flux to support surface preparation, wetting, and controlled solder flow during the repair.
Choose Solder Paste When:
The process requires a paste that supplies the solder alloy itself, such as component installation, reflow, or other controlled board-level soldering work.
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Better Flow. Better Control.
PolarTronix Solder Flux Paste is formulated for professional electronics soldering, helping support proper wetting and controlled solder flow during microsoldering, component work, connector repair, and board-level rework.
10 gNo-CleanLead-FreeHalogen-Free