August 26, 2026 Kester SF855-LR Soldering Flux
Kester SF855-LR Soldering Flux is a low-solid, low-residue, no-clean, non-rosin organic flux engineered specifically for Photovoltaic (PV) assembly operations. Developed by Kester, this advanced formulation is highly optimized for tabber and stringer equipment, ensuring reliable bonds when soldering tabs directly to solar cell contacts.
Why Choose SF855-LR Soldering Flux?
Designed to maximize production efficiency in the solar industry, this flux offers flexible application methods and pristine cosmetic results:
- Application Versatility: Can be applied directly to interconnecting ribbons via automated tabbing and stringing systems, hand soldering, dipping, or spraying methods.
- Extremely Low Solids: With an ultra-low solids content of approximately 1.6%, the specialized activator system leaves practically no residue on the PV cell post-soldering.
- Cosmetically Clean Output: Solar cells emerge completely dry and cosmetically clean as they exit the tabber and stringer machine, eliminating post-process cleaning requirements.
- Broad Operating Window: Features a wide temperature range and operating window, accommodating complex thermal profiles.
- Alloy Compatibility: Fully compatible with both traditional leaded (SnPb, SnAgPb) and modern Pb-free solder alloys.
Technical Specifications
| Property | Specification Details |
|---|---|
| Product Name | Kester SF855-LR Soldering Flux |
| Flux Chemistry | Non-Rosin Organic, No-Clean, Low-Solid (~1.6%) |
| Primary Application | PV Assembly (Tabber and Stringer Equipment) |
| Application Methods | Hand Soldering, Auto-Equipment, Dipping, Spraying |
| Alloy Compatibility | SnPb, SnAgPb, Pb-Free Applications |
| Post-Solder Condition | Dry, Clean, Practically No Residue |
Conclusion
Integrating Kester SF855-LR Soldering Flux into your photovoltaic manufacturing line guarantees secure tab-to-cell bonds while maintaining perfectly clean, dry solar panels. For detailed technical support, product datasheets, or supply inquiries, please visit Contact – LORIOT INDUSTRIAL.
