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Kester 185 liquid flux – high-reliability rosin-based formulation for wave soldering and rework, providing strong activity, excellent wetting, and minimal safe residues to ensure durable solder joints across electronic assemblies.

  • Item Number: 185

  • Manufacturer: Kester®

  • Flux Type/ Chemistry: Rosin-based liquid flux

  • Viscosity/ Form: Low viscosity liquid

  • Activity/ Classification: RMA; IPC J-STD-004 classification ROL0

  • Packaging: Contact to Techniq VN for details.

  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Kester 185 Liquid Flux is a high-performance, no-clean flux formulated for both lead-free and tin-lead soldering applications. It delivers excellent wetting, consistent solder joint formation, and minimal residues, ensuring reliable performance in electronic assemblies. The flux is optimized for fine-pitch and high-density PCB components, providing precise and repeatable results.

2. Applications

185 Liquid Flux is suitable for wave soldering, selective soldering, hand soldering, and rework processes. It is widely used in PCB assembly, repair, and rework operations where controlled and accurate soldering is critical. The flux performs reliably in both automated and manual soldering methods.

3. Typical Properties – Specifications

  • Flux Type: No-clean, mildly activated

  • Form: Liquid

  • Halogen Content: Halogen-free

  • Residues: Minimal, non-corrosive, compatible with no-clean processes

  • Compatibility: Works with lead-free and tin-lead solder alloys

  • Activation: Provides reliable wetting and strong solder joints

  • Storage: Store in a cool, sealed container to preserve flux activity and shelf life

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