August 24, 2026 Kester 979VT Soldering Flux for Lead-Free Assembly
Kester 979VT Soldering Flux is a VOC-free, no-clean flux formulation engineered for high-quality, low-defect soldering of lead-free electronic circuit board assemblies. Developed by Kester, this specialized liquid flux provides superior thermal performance tailored specifically to meet the demanding requirements of lead-free manufacturing environments.
Activation System and Solderability
The finely tuned activation system in Kester 979VT Soldering Flux offers the best wetting available in VOC-free liquid flux technology, producing the shiniest solder joints possible. Furthermore, 979VT Soldering Flux effectively reduces micro-solderballing on both glossy and matte laminates as well as between connector pins.
Board Compatibility and Residue Profile
Kester 979VT Soldering Flux will not attack properly cured solder masks or FR-4 Epoxy-Glass laminate. Specially formulated to accommodate the needs of single-sided board assemblers, Kester 979VT Soldering Flux leaves no haze or visible residue behind, completely eliminating the white powdery residue commonly associated with earlier no-clean flux formulas.
Technical Specifications
| Property | Specification |
|---|---|
| Product Model | Kester 979VT |
| Flux Type | VOC-Free, No-Clean Liquid Flux |
| Application Compatibility | Lead-free Soldering, Single-sided Boards |
| Substrate Compatibility | FR-4 Epoxy-Glass, Cured Solder Masks, Glossy & Matte Laminates |
| IPC Classification (J-STD-004) | ORL0 |
| IPC Classification (J-STD-004B) | ORM0 |
| Residue Appearance | No haze, No visible residue, No white powder |
Conclusion
For lead-free electronic manufacturing requiring pristine visual inspection and high electrical reliability, Kester flux formulations provide industry-leading performance. For technical consulting, datasheet requests, or commercial inquiries, please reach out via Contact – LORIOT INDUSTRIAL.
