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Kester 186 liquid flux – rosin mildly activated (RMA) formulation for wave soldering and rework, delivering strong wetting, high reliability, and non-corrosive residues to ensure durable solder joints in electronic assemblies.

  • Item Number: 186

  • Manufacturer: Kester®

  • Flux Type/ Chemistry: Rosin-based, mildly activated (RMA) 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 186 Liquid Flux is a premium, no-clean flux formulated for both lead-free and tin-lead soldering applications. It offers superior wetting, consistent solder joint formation, and minimal residues, ensuring high reliability and quality in electronic assemblies. The flux is designed for fine-pitch components and high-density PCB assemblies, providing precise and repeatable performance.

2. Applications

186 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 reliable soldering is essential. The flux delivers consistent results across 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: Ensures consistent wetting and strong solder joints

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

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