0.33 oz. Mildly Activated Rosin Liquid Flux Pen®

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Substitute Products

  • Jameco Part no.: 2237642
  • Manufacturer: Kester
  • Manufacturer no.: 83-1000-0186
  • Hazard *This product must ship ground
    within the 48 contiguous United States
  • HTS code: 3810000000
  • Web Exclusive
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1+ $7.95
5+ $7.49

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0.33 oz. Mildly Activated Rosin Liquid Flux Pen®

For Lead-bearing and Lead-free alloys

Kester 186 Flux Pen is specifically designed for leaded and lead-free rework of conventional and surface mount circuit board assemblies. Kester 186 under MIL-F-14256, was QPL approved as Type RMA. Although the fluxing ability approaches that of Type RA flux, residues after soldering are non-corrosive and non-conductive. Kester 186 has been developed for use in critical applications where difficult assemblies are to be soldered, but process requirements stipulate use of Type RMA flux.

Kester 186 possess high thermal stability for soldering multi-layer assemblies which require higher temperatures. Exposure to high preheat temperatures does not degrade solubility of the residue in normal cleaning solvents. There is no surface insulation resistance degradation caused by the flux residue. The use of a minimum of ionic activating agents and the inactive nature of the residue permits leaving the residue on circuit board assemblies for many applications. The flux residue is also moisture and fungus resistant.


  • 0.33 oz. pen
  • High thermal stability
  • Improves soldering performance
  • Eliminates the need and expense of cleaning
  • Classified as ROL0 per J-STD-004

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  • Specification Value
    Volume (fl. oz.)0.33

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