August 25, 2026 Kester 2331-ZX Flux: Neutral pH Water-Soluble Rework Pen
Kester 2331-ZX Flux Pen® is specially designed for leaded and lead-free rework of conventional and surface mount circuit board assemblies. Featuring an innovation in organic acid water-soluble flux chemistry, this pen applicator delivers precise, localized fluxing for high-reliability soldering. Discover more about official electronic joining tools and materials at Kester.
Key Features and Engineering Advantages
Engineered for critical electronic assemblies in telecommunications, computing, and high-reliability industrial sectors, Kester 2331-ZX Flux offers unique chemical and operational benefits:
- Neutral pH Chemistry: Features a unique neutral pH formulation that provides the best ionic cleanliness among organic water-soluble fluxes available in the electronics industry.
- Leaded & Lead-Free Rework: Versatile application capability suitable for both leaded and lead-free alloy rework on surface mount and through-hole boards.
- Substrate Protection: Safe for circuit components; will not attack properly cured solder masks or FR-4 epoxy-glass laminates, preserving surface insulation resistance (SIR).
- Minimal Odor & Low Foaming: Emits no offensive odors during soldering operations and will not cause excessive foaming in standard aqueous wash systems.
- Cost-Effective Cleanability: Highly washable residue minimizes cleaning costs while fully complying with strict environmental regulations.
Rework Application
The convenient pen applicator format of Kester 2331-ZX Flux allows technicians to apply controlled amounts of neutral pH flux directly to target pads, boosting touch-up productivity without compromising assembly integrity.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Product Name | Kester 2331-ZX Flux-Pen® |
| Flux Type | Organic Acid Water-Soluble (Neutral pH) |
| Alloy Compatibility | Leaded and Lead-Free Solders |
| Substrate Compatibility | FR-4 Epoxy-Glass, Cured Solder Masks |
| Applicator Format | Precision Pen Applicator (Flux-Pen®) |
| Cleaning Method | Standard Aqueous / Water Cleanable |
Conclusion
When SMT and conventional circuit rework demand maximum ionic cleanliness, high SIR preservation, and controlled application, Kester 2331-ZX Flux Pen® delivers unmatched reliability. For inquiries or product sourcing, please visit Contact – LORIOT INDUSTRIAL.
