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Kester 186 Flux-Pen® – convenient RMA flux applicator designed for rework and touch-up soldering, offering controlled flux deposition, excellent wetting, and reliable solder joint quality with minimal residue.

  • Item Number: 186 Flux-Pen®

  • Manufacturer: Kester®

  • Flux Type/ Chemistry: Rosin mildly activated (RMA) flux

  • Viscosity/ Form: Low viscosity liquid in flux-pen dispenser

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

  • Packaging: Flux-Pen® format (Contact to Techniq VN for details)

  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Kester 186 Flux-Pen® is a convenient, no-clean flux delivery system designed for precision applications in electronics assembly. It provides excellent wetting, reliable solder joint formation, and minimal residue, ensuring high-quality performance in both lead-free and tin-lead soldering processes. The pen format allows for controlled, targeted application, ideal for fine-pitch components and rework operations.

2. Applications

186 Flux-Pen® is suitable for hand soldering, touch-up, rework, and repair of printed circuit boards (PCBs). It is particularly effective for fine-pitch components, high-density assemblies, and areas where precise flux application is required. The flux pen facilitates accurate deposition without excess flux, supporting both high-reliability and no-clean processes.

3. Typical Properties – Specifications

  • Flux Type: No-clean, mildly activated

  • Form: Liquid, pen delivery system

  • 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 consistent wetting and reliable solder joints

  • Storage: Keep capped and store in a cool environment to maintain activity and shelf life

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