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Kester 83-1000-0186 Mildly Activated Rosin Liquid Flux Pen for Lead-Bearing and Lead Free Alloy, 0.33 fl. oz.

  • Based on 546 reviews
Condition: New
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Availability: In Stock.
Fulfilled by CONCORDE ELECTRONICS

Arrives Tuesday, May 28
Order within 4 hours and 46 minutes
Available payment plans shown during checkout

Color: Original Version


Features

  • High activity
  • Chemically compatible with most solder masks and board laminates
  • pH Neutral Chemistry
  • Classified as ORH1 per J-STD-004

Description

Kester 186 Flux-Pen is specifically designed for leaded and lead-free rework of conventional and surface mount circuit board assemblies. 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. 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. 186 possesses 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

Manufacturer: ‎NTE Electronics, Inc.


Part Number: ‎83-1000-0186


Item Weight: ‎0.81 ounces


Package Dimensions: ‎5.5 x 0.5 x 0.5 inches


Item model number: ‎83-1000-0186


Is Discontinued By Manufacturer: ‎No


Size: ‎0.33 Fl Oz (Pack of 1)


Color: ‎Original Version


Item Package Quantity: ‎1


Batteries Included?: ‎No


Batteries Required?: ‎No


National Stock Number: ‎3439-01-510-2558


Date First Available: April 19, 2011


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, May 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Excellent flux for all electronics
Color: Original Version
Kester RMA is excellent flux. Yes, it's sticky and leaves residue, but the residue is self passivating. That means that you do not need to clean it off. In fact, you will have less trouble, less leakage, less corrosion if you just leave it in place. I had the opportunity to work with one of the top experts in solder when I worked for Bill & Dave's Excellent Company. There is NO solder joint better than a tin-lead eutectic fluxed with Kester RMA. Everything else is a step down in quality. ... show more
Reviewed in the United States on April 13, 2023 by nobler

  • Its ok
Color: Original Version
Not the best flux ive used. But pretty convenient.
Reviewed in the United States on April 8, 2023 by Joseph Esposito

  • Great for daily use
Color: Original Version
This is a great product, I use it every day for the odd joint here and there that I need to rework a little more than usual. It lasted me over a year and implements the really easy to apply, pen style, flux.
Reviewed in the United States on August 17, 2022 by jonah

  • Great
Color: Original Version
Not much to say, Kester products are great. They may cost more but are worth it.
Reviewed in the United States on December 9, 2022 by Michael

  • Good quality RMA flux in a convenient pen
Color: Original Version
Good reliable flux pen. Takes a few tries to first prime the pen when brand new but after that it flows fine. Just paint the flux on where you need it. Kester 186 is a good RMA flux. It's a bit sticky, as most rosin base fluxes, so I like to clean it with a bit of flux cleaner after I'm done. Technically you can leave it on as it is non-conductive and non-corrosive. Kester 186 (RMA) and Kester 951 (No Clean) are my go to liquid fluxes for both lead and non-lead solder work. Great for soldering and desoldring. Don't cheap out on solder, flux, and soldering iron and you'll have no problem soldering. ... show more
Reviewed in the United States on August 17, 2020 by Steven Steven

  • Works well, but there are other options
Color: Original Version
This is a 'medium' level flux that works really well for most materials. Always use leaded solder to get the best and most durable joints! This flux Does leave behind a sticky residue that should be cleaned with isopropyl alcohol (90% or greater). The "SRA #312 Soldering Flux Pen" seems to work just as good and does not leave behind the residue; also dispenses much easier :) ... show more
Reviewed in the United States on January 20, 2020 by Tank

  • Love this stuff, works great
Color: Original Version
This is my go-to flux, especially for tight spots, small items, and keeping in my portable solder station. It makes the solder flow and isn't a globby mess like paste flux. And you can kinda pump the tip if you need to soak a bigger tumble of wires. I love this stuff- Kester makes excellent products. ... show more
Reviewed in the United States on March 7, 2021 by Victor Victor

  • The flux on stick made my soldering easier and fast.
Color: Original Version
I wished the sold them in two value packs and the flux was instant for clean job and the removal cap made easy cover compared to using a paint brush for flux jar. Would recommend to anyone soldering
Reviewed in the United States on September 13, 2021 by djcrash817

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