Kester Flux Pen #951 Low Solids No Clean (Retired)


Stop wasting time and mucking up your workspace with traditional, messy flux applicators. If you regularly use flux in your hand soldered projects, we highly recommend trying this no-muss, no-fuss applicator pen.

Inside, it looks like a felt-tipped marker. You simply press the tip down to get the liquid flowing, and then apply to the pads/leads of the device you are working on to distribute the flux, and get to work!

This Kester Flux Pen will work on both Through-Hole, and Surface Mount style devices. Making the perfect addition to your soldering setup, this pen is easy to use, maintain, and keep clean. Non-refrigerated, it should last a year or more!

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Package Contents:

Kester Flux Pen #951 Low Solids No Clean

Technical Specifications

Storage and Safety

For best results and longevity of this product, please keep your flux pen in a refrigerated environment. If kept at room temperature, the pen should last and function properly for about a year.

The Science of Flux

“…In high-temperature metal joining processes, the primary purpose of flux is to prevent oxidation of the base and filler materials.

Flux is a substance which is nearly inert at room temperature, but which becomes strongly reducing at elevated temperatures, preventing the formation of metal oxides. Additionally, flux allows solder to flow easily on the working piece rather than forming beads as it would otherwise….

…The role of a flux in joining processes is typically dual: dissolving of the oxides on the metal surface, which facilitates wetting by molten metal, and acting as an oxygen barrier by coating the hot surface, preventing its oxidation. In some applications molten flux also serves as a heat transfer medium, facilitating heating of the joint by the soldering tool or molten solder.”
excerpt from “Principals of Soldering” by Giles Humpston, David M. Jacobson


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SKU: 615872423606 Category: