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.
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.
Helps Manage Oxidation
Flux helps condition metal surfaces during heating, supporting more effective solder contact with pads, terminals, and component leads.
Supports Solder Wetting
Proper flux application helps solder spread across prepared metal surfaces instead of remaining concentrated in an uncontrolled bead.
Promotes Controlled Flow
Flux supports predictable solder movement around pads, terminals, leads, and other soldering areas during professional electronics work.
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.
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.
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.
Microsoldering
Suitable for detailed board-level work where controlled flux application can support solder wetting around small pads, leads, and precision components.
Component Installation
Useful during component installation and replacement to support consistent solder flow across prepared pads and terminals.
Connectors & Ports
A practical choice for connector and port repair where multiple solder joints require controlled wetting and reliable solder movement.
PCB Repair & Rework
Designed for professional board-level repair including solder touch-up, component replacement, rework, and general electronics servicing.
Flux should be selected and applied according to the solder alloy, component, PCB, repair process, and intended operating conditions of the assembly.
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.
Helps Manage Oxidation
Flux helps condition metal surfaces during heating, reducing the effect of oxidation that can interfere with consistent solder 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.
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.
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.
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.
Flux Paste
Solder Paste
Which One Do You Need?
You already have solder or solder wire and need flux to support surface preparation, wetting, and controlled solder flow during the repair.
The process requires a paste that supplies the solder alloy itself, such as component installation, reflow, or other controlled board-level soldering work.
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.