Liquid Solder Flux

Liquid solder flux available in a range of high-reliability formulations, designed for use with assemblies featuring various pad finishes and thicknesses.

Advanced Liquid Fluxes

Our liquid flux products improve wetting, minimize defects, and ensure strong, electrochemically reliable joints, enhancing overall quality and performance in through hole component soldering.

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ALPHA® 856 Liquid Soldering Flux

A neutral pH, 15% solids, moderate to high-activity water-soluble flux, non-acidic and can sit in production before washing.

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ALPHA® 857 Liquid Soldering Flux

Non-neutral pH, 18% solids, high-activity water-soluble flux formulated for optimal soldering performance on demanding assemblies.

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ALPHA® 870-25 Liquid Soldering Flux

Neutral pH, mid-activity water-soluble flux that contains organic chloride activators for wave soldering and touch-up/rework.

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ALPHA® EF-2100 Liquid Soldering Flux

High-performing ORL0, halide-free, VOC-free no-clean flux for hole-fill and low-defect soldering in lead-free assemblies.

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ALPHA® EF-5601 Liquid Soldering Flux

A resin/rosin-based, reduced-VOC, low-solids, no-clean flux providing performance comparable to 100% alcohol fluxes.

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ALPHA® EF-6000 Liquid Soldering Flux

A rosin-free, no-clean, alcohol-based liquid flux designed to enhance board cosmetics and prevent solder balling and bridging.

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ALPHA® EF-6038HF

An ultra-low residue, alcohol-based, halogen-free, no-clean flux designed for high-reliability soldering of standard to moderately complex PCB assemblies.

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ALPHA® EF-6103 Liquid Soldering Flux

A 3.6% low-solids, no-clean alcohol-based flux with an activation package for fast wetting, high force, and improved hole fill.

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ALPHA® EF-6808HF Liquid Soldering Flux

A broad-spectrum halogen-free, low-solids, alcohol-based, no-clean flux for a variety of automated and manual applications.

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ALPHA® EF-8800HF
Liquid Soldering Flux

A halogen-free, high-reliability, mid-solids, alcohol-based, no-clean wave soldering flux for standard & thick board applications.

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ALPHA® EF-9301 Liquid Soldering Flux

A 7% mid-solids, rosin-containing full dulling flux that provides excellent solderability and reliability in wave soldering.

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ALPHA® NR205 Liquid Soldering Flux

Halogen-free, rosin-free, low-solids, no-clean flux formulated for wave soldering, ideal for touch-up and rework with flux pens.

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Cored Solder Wire

Ensure robust performance in critical assemblies with high-reliability cored solder wire designed for primary attach and rework.

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Electronic Cleaners

Achieve consistent, reliable cleaning results with solutions designed for a variety of assembly applications.

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Solder Alloys

Ensure reliable PCB assembly with high-quality solder alloys that form strong, durable joints for diverse end-use applications.

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Why MacDermid Alpha?

Integrated Solutions
Our liquid flux solutions streamline through-hole circuit board assembly, improving productivity, solderability, and overall PCB manufacturing quality with reliable, high-performance materials. Designed for consistent wetting and reduced defects, they enhance process efficiency and assembly yield. These solutions also support sustainable electronics manufacturing through reduced material waste, improved process control, and RoHS-compliant production.

Sustainability
Our liquid flux solutions for through-hole PCB assembly support sustainable electronics manufacturing by reducing environmental impact, lowering Total Cost of Ownership (TCO), and maintaining high performance, safety, and reliability. Designed for efficient soldering processes, they help minimize material waste, improve process efficiency, and support RoHS-compliant, greener electronics production while ensuring consistent solder joint quality.

Reliability
Our liquid flux solutions for through-hole circuit board assembly deliver consistent, high-quality soldering performance and long-term reliability in PCB manufacturing. Engineered for optimal wetting, strong solder joint formation, and stable process control, they enhance assembly yield and reduce defects. Ideal for automotive, industrial, and consumer electronics, these materials ensure dependable performance in demanding electronics applications.

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Frequently Asked Questions

Why choose MacDermid Alpha liquid fluxes for through-hole PCB assembly and electronics manufacturing?

MacDermid Alpha liquid fluxes are designed to deliver high-performance soldering solutions for virtually any electronics or industrial through-hole assembly application. With a broad portfolio of flux chemistries, they ensure excellent wetting, stable process control, and consistent solder joint quality across diverse manufacturing environments. Supported by a global supply network, we provide seamless, copy-exact product availability to help multinational manufacturers maintain process consistency across sites, reduce supply chain complexity, and lower total cost of ownership. These liquid flux solutions improve production efficiency, reduce defects, and support high-reliability electronics manufacturing in automotive, industrial, and consumer applications where consistent performance is critical.

How do I know if a liquid flux is suitable for PCB assembly and electronic manufacturing applications?

No, not all liquid fluxes are suitable for electronic applications such as PCB assembly. Only specific formulations designed for circuit board manufacturing offer the required electrochemical reliability, low residue behavior, and compatibility with sensitive electronic components. These high-performance liquid fluxes ensure strong, consistent solder joints while minimizing risks such as corrosion, electrical leakage, or long-term reliability failures. Many general industrial fluxes are intended for non-electronic soldering and do not meet the stringent requirements of modern electronics manufacturing. Choosing the right electronics-grade liquid flux improves process stability, solderability, and long-term reliability in automotive, industrial, and consumer electronic applications.

What is the difference between flux requirements for wave soldering vs selective soldering in PCB assembly?

Not all fluxes are suitable for both wave soldering and selective soldering applications. Due to differences in process dynamics, contact time, and thermal exposure, selective soldering typically requires fluxes with faster activation, precise deposition control, and minimal residue, while wave soldering fluxes are formulated for broader coverage and longer process interaction. Using the correct liquid flux for each application ensures optimal wetting, reduced defects such as bridging or icicles, and improved solder joint reliability. Selecting application-specific flux chemistries enhances process stability, increases throughput, and supports high-quality PCB assembly in automotive, industrial, and consumer electronics manufacturing environments.

Are all liquid fluxes compatible with lead-free PCB soldering processes?

No, not all liquid fluxes are suitable for lead-free soldering processes. Lead-free assembly requires higher reflow and wave soldering temperatures, so only fluxes specifically formulated for high-temperature stability and strong electrochemical performance should be used. These advanced liquid fluxes ensure effective wetting, reduced oxidation, and reliable solder joint formation under elevated thermal conditions. Using the correct lead-free compatible flux helps prevent issues such as residue buildup, poor solderability, and long-term reliability failures. Selecting purpose-designed flux chemistries improves process stability, enhances yield, and supports high-reliability PCB manufacturing in automotive, industrial, and consumer electronics applications transitioning to RoHS-compliant production.

 

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