ALPHA® Liquid Soldering Flux

No-clean, water soluble, low VOC, halogen-free fluxes meet the challenges of both tin-lead and lead-free processes.

ALPHA® EF-Series fluxes offer environmentally friendly benefits, while providing unmatched soldering performance. The ALPHA® soldering flux line is unsurpassed in providing wave soldering process solutions. Its alcohol-based fluxes provide excellent wetting, virtually defect-free soldering and high line throughput across the full range of applications.

Our latest line of wave solder fluxes, including our EF-Series, is designed to provide the highest level of performance and reliability in its class. Specific wave solder flux products were formulated to offer a safer and more environmentally friendly alternative to ordinary fluxes.

ALPHA® fluxes have been developed using the latest Alpha flux technology. We operate many Liquid Soldering flux production facilities around the world, and each of these sites follows strict standards that assure high product quality and unmatched consistency.

  • All ALPHA® EF-Series fluxes were developed for SnPb and Pb-free applications and are halogen-free.

Soldering Flux Selector Guide

Soldering Flux Selector Guide

Find information about our leading soldering flux products by clicking on the product name below, or use our Online Flux Selector Tool by clicking on the Flux Selector button

ALPHA® Selective Soldering Selector Guide

Click here to find the best liquid soldering flux and Pb-free solder alloy to use for your selective soldering process.

Selective solder guide image


Find information about our leading soldering flux products by clicking on the product name below, or use our Online Flux Selector Tool by clicking on the Flux Selector button

Solder Flux Selector

VOC-Free Water-Based No-Clean Fluxes

Product Name

ALPHA® EF-2210
ALPHA® EF-3001
ALPHA® EF-3215
ALPHA® EF-4102
ALPHA® NR 330
Solvent Based No-Clean Fluxes
Product Name
ALPHA® EF-5601 (Low VOC)
ALPHA® EF-6000
ALPHA® EF-6103
ALPHA® EF-6850HF (Halogen Free)
ALPHA® EF-8000
ALPHA® EF-8300
ALPHA® EF-9301
ALPHA® EF-12000
ALPHA® RF-800
ALPHA® SLS-65C (Halogen Free)
Water-Soluble Fluxes
Product Name
ALPHA® WS-375
ALPHA® WS-856
ALPHA® WS-857
WS-3355-ALPHA® VF
Write Flux Pens Flux Type Description
Product Name
ALPHA® 615-25 RMA High solids (25%), no clean rework flux for extremely high reliability applications (medical, military)
 
ALPHA® NR-205 No Clean Lowest solids, best cosmetics
 
ALPHA® EF-6100 R No Clean Low solids (<4%), no clean, high reliability rework flux with excellent cosmetics
 
ALPHA® WS-870-25 Water Soluble Highly active, water cleanable rework flux

ALPHA® Wave Solder Flux

Wave Solder Fluxes that deliver best in class soldering performance and electrical reliability, including options that improve worker safety and are better for the environment.

ALPHA® branded Wave Solder Fluxes are the leader in providing wave soldering process solutions. Our latest line of wave solder fluxes, including our EF-Series, is designed to provide the highest level of performance and reliability in its class. Specific wave solder flux products were formulated to offer a safer and more environmentally friendly alternative.

All ALPHA® Wave Solder Fluxes have been developed using the latest Alpha flux technology. Alpha operates many wave solder flux production facilities around the world. Each site follows strict standards that assure high product quality and consistency.

All ALPHA® EF-Series fluxes were developed for SnPb and Pb-free applications and are halogen-free*.

WATER-BASED wave solder flux

ALPHA EF-2210

  • VOC-free
  • Excellent soldering performance
  • Rosin free formulation results in excellent cosmetics and pin testability
  • Bellcore SIR compliant

ALPHA EF-3001 and ALPHA EF-3215

  • Low-VOC formula – nonflammable
  • Resin bearing emulsion flux for high reliability and performance – Bellcore SIR compliant

Halogen Free
* Halogen-free, per guidelines published in the following industry standards:
IPC-4101B, IEC-61249-2-21 and JPCA-ES-01-1999.


ALCOHOL-BASED wave solder flux

ALPHA EF-6000

  • Highly active for exceptional soldering performance
  • Low solids (2%) for excellent cosmetics and pin testability
  • High soldering yields

ALPHA EF-6100

  • High reliability – JIS SIR compliant
  • Low solids for excellent cosmetics and pin testability
  • High soldering yields

ALPHA RF-800 Rosin No-Clean Flux

  • Best selling low-solids (4%) flux in the world
  • Excellent soldering on a wide variety of assembly types
  • High reliability – JIS SIR compliant

ALPHA EF-8000

  • Excellent solder performance on complex two sided assemblies
  • Perfect for selective soldering applications
  • High reliability – JIS SIR compliant

ALPHA EF-9301 Flux

  • Excellent solder performance on a variety of complex two sided assemblies
  • Halide bearing dulling flux
  • High reliability – JIS SIR compliant

ALPHA EF-12000

  • High-solids (15%) dulling flux
  • Maximum wetting on a wide variety of simple and complex assemblies
  • High reliability – JIS SIR compliant

Wave Solder Flux

Alpha EF-Series Write Flux Wave Solder Flux

Hand Fluxing and Related Products

• Flux Thinners

• Alpha Flux Pens

  • ALPHA Aqualine: water-soluble
  • ALPHA Guideline: rosin flux
  • ALPHA Cleanline: very low residue
• Flux gel

• Flux stop

To fully support wave soldering requirements, Alpha also offers ALPHA Wave Solder Flux alloys, solder wire, and cleaning chemistries.

Don't see the ALPHA® flux product you are looking for? Use our convenient Product Search.

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