Xcat Premium Rosin Flux Paste & Precision Flux Syringe
Achieve clean, consistent solder joints with the Xcat Flux range. Developed for controlled wetting and minimal residue, Xcat flux is designed for electronics, PCB work, and everyday workshop soldering.
- ✓ No-clean rosin formulation for tidy joints and reliable flow
- ✓ Two application formats – paste for bench work or syringe for precision
- ✓ Tested for real-world use across repair, rework and general soldering
Choose paste for general bench work, or syringe for controlled, pinpoint application.

Xcat Premium Rosin Flux Paste – clean, controlled soldering with minimal residue.
Xcat Soldering Flux – Technical Information
The Xcat Flux range uses a no-clean, rosin-based formulation designed to improve solder wetting, promote consistent flow, and reduce oxidation during soldering. It is suitable for electronics assembly, PCB repair, and general workshop soldering where clean, controlled results are required.
- Rosin-based soldering flux
- No-clean formulation
- Designed for controlled wetting
- Low residue after soldering
- Stable at typical soldering temperatures
- PCB assembly and repair
- Through-hole soldering
- SMD rework and touch-up
- General electronics soldering
- Workshop and bench use
- Flux paste for bench and general use
- Precision syringe for targeted application
- Suitable for manual and rework soldering
Select paste for broader coverage or syringe for controlled, pinpoint flux placement.
Xcat soldering flux is intended for use by competent users familiar with standard electronics soldering practices.
Performance & Application Quality
Effective soldering flux must improve wetting and flow without introducing excess residue or instability. The Xcat Flux range is formulated to support consistent solder behaviour, controlled activation, and reliable results across common electronics and workshop applications.
Clean Wetting & Solder Flow
Xcat flux is designed to activate at typical soldering temperatures, helping solder wet surfaces evenly and flow smoothly into joints. This improves joint consistency and reduces the risk of dry or incomplete connections.
- Supports smooth solder flow
- Improves wetting on common PCB finishes
- Helps reduce rework and touch-ups
Controlled Activation & Residue
The no-clean rosin formulation provides controlled activation during heating, then remains stable once the joint has cooled. Residue is minimal and typically does not require removal.
- No-clean formulation
- Low visible residue after soldering
- Suitable for enclosed or compact assemblies
Practical Handling & Application
The flux is supplied in formats suited to different working styles. Paste offers convenient coverage for bench work, while the syringe format allows controlled, targeted application for precision soldering and rework.
- Paste format for general and bench soldering
- Syringe format for precise application control
- Consistent behaviour across common soldering tasks
10g • 20g • 30g • 50g • In stock • Fast dispatch
Xcat Soldering Flux – FAQs
What type of flux is Xcat Flux?
Xcat Flux is a rosin-based, no-clean soldering flux designed to improve wetting and solder flow during electronics, PCB, and general soldering work. It is formulated for controlled activation and low residue.
Is this flux suitable for electronics and PCB work?
Yes. Xcat Flux is suitable for common electronics applications including PCB assembly, repair, rework, and through-hole soldering. It supports clean joints on typical copper pads and component leads.
Do I need to clean the flux residue after soldering?
In most cases, no. The no-clean formulation leaves minimal residue that does not normally require removal. If cosmetic cleanliness is critical, residue can be removed with isopropyl alcohol.
What is the difference between the paste and syringe formats?
The paste format is ideal for general bench work and broader application. The syringe format allows precise, controlled placement of flux for fine-pitch components, SMD rework, and targeted soldering.
What solder types does Xcat Flux work with?
Xcat Flux is compatible with common leaded and lead-free solders used in electronics and general soldering, including tin-based alloys typically used with hand soldering irons.
How should the flux be stored?
Store the flux in a cool, dry place with the lid or cap securely closed. Avoid prolonged exposure to excessive heat or direct sunlight to maintain consistency and performance.
Ready for Cleaner, More Controlled Soldering?
Improve wetting, reduce rework, and achieve consistent joints with the Xcat Premium Rosin Flux range. Designed for electronics, PCB work, and everyday workshop soldering, Xcat flux delivers reliable performance without unnecessary residue.
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