5ml Soldering Flux

5ml Soldering Flux


Kester 979 VOC-free, No-Clean, soldering flux conveniently packaged in a syringe for easy, targeted DIY dispensing. Best results are obtained when solder cups, tabs, wire, boards are pre heated with a heat gun or hot hair dryer after flux is applied to evaporate the thinner (DI water) used in 979. This reduces splattering and improves soldering performance.


  • 5ml of Kester 979 VOC-free, No-Clean soldering flux.

  • 1x 6ml manual syringe.

  • 27 gauge, 1/2 inch long tip.

  • syringe cap/upright stand.

  • Kester 979 flux is formulation for high quality, low-defect soldering of connectors and electronic circuit board assemblies. This flux's finely tuned activation system offers the best wetting available in VOC-free liquid flux technology and the shiniest solder joints. 979 also reduces micro solderballing on glossy laminates and between connector pins. 979 leaves a minimal amount of residue after soldering and all remaining residues are non-corrosive, non-conductive and do not need to be removed. 979 will not attack properly cured solder masks or fiber reinforced laminate.

This product, during handling or use, may be hazardous to your health or the environment. Read the Safety Data Sheet (SDS) and warning label before using this product [link].

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  • Does not degrade surface insulation resistance.

  • Bright, shiny solder connections.

  • Minimal offensive odors (unless overused).

  • Chemically compatible with most solder masks and board laminates.

  • Simple cleaning if desired using warm deionized or distilled water (plain DI water at 43-54°C (110-130°F). A descaler or saponifier for circuit boards is recommended.

  • Biodegradable at pH of 2.0 or greater.

  • RoHS compliant.

Kester 979 Soldering Flux VOC-free No-Clean Technical Datasheet [link].