August 24, 2026 Kester 2120 Flux: High-Cleanliness Organic Flux Solution
Kester 2120 Flux is a halide-free organic flux specifically formulated for automated soldering of printed circuit board assemblies. Compatible with bare copper and solder-coated boards, it ensures reliable intermetallic bonding while maintaining high environmental and operational safety. For more information regarding official soldering chemistry, visit Kester.
Key Attributes and Process Advantages
Formulated without chlorides, bromides, or phosphates, Kester 2120 Flux provides superior soldering performance while simplifying post-solder cleaning. Key benefits include:
- Halide-Free Chemistry: Contains no chlorides or bromides, facilitating easier residue removal and preventing post-solder ionic contamination.
- Superior Joint Aesthetics & Cleanliness: Yields bright, shiny solder connections and achieves high ionic cleanliness following aqueous cleaning cycles.
- Enhanced Surface Insulation Resistance: Delivers higher SIR values compared to conventional water-soluble fluxes, making it ideal for surface mount technology (SMT) assemblies.
- Substrate & Solder Mask Compatibility: Will not attack cured solder resists or FR-4 epoxy-glass laminates, demonstrating higher chemical compatibility than competing water-soluble solutions.
- Eco-Friendly & Operator Safe: Emits no offensive odors or excessive smoke during soldering, creates minimal foam in standard aqueous wash systems, and features a fully biodegradable composition.
Assembly Compatibility
By preventing chemical degradation of standard circuit substrates, Kester 2120 Flux supports high-yield automated wave and selective soldering workflows without compromising laminate structural integrity.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Product Name | Kester 2120 Soldering Flux |
| Flux Type | Halide-Free Organic Water-Soluble Flux |
| Halide Content | 0.0% (Free of Chlorides, Bromides, Phosphates) |
| Substrate Compatibility | Bare Copper, Solder-Coated, FR-4 Laminate, Cured Solder Masks |
| Cleaning & Disposal | Water-washable, low-foaming, 100% biodegradable wash water |
Conclusion
For automated SMT and mixed-technology assemblies requiring high surface insulation resistance and simple water washability, Kester 2120 Flux offers an exceptional balance of performance and safety. To request product quotes or technical data, please visit Contact – LORIOT INDUSTRIAL.
