Kester
Kester Flux Formula 2331-ZX Water Soluble Flux Pen by Kester
Bottom line: The Kester Flux Formula 2331-ZX Water Soluble Flux Pen by Kester is a specs-and-price decision rather than a crowd-consensus one in the tools & maintenance category, priced around $19.99 on Amazon as of 2026-10-06. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Kester 2331ZX pen
- ✓ Backed by Kester's warranty and support channels
Cons
- ✗ Check battery runtime and RPM/CFM specs match your case size and cleaning frequency
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
Kester 2331-ZX Flux Pen is designed for leaded and lead-free rework of conventional and surface mount circuit board assemblies. 2331-ZX Flux Pen is an innovation in organic acid water-soluble flux chemistry for soldering circuit board assemblies. This unique, neutral pH chemistry flux provides the best ionic cleanliness of any organic water-soluble flux available to the electronics industry. This popular flux has been used for soldering critical assemblies in the telecommunications, computer and other industries. No offensive odors will be emitted during soldering. 2331-ZX Flux Pen will not…
SpecPicks Verdict
SpecPicks scored Kester Flux Formula 2331-ZX Water Soluble Flux Pen by Kester using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. Kester's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Kester 2331ZX pen
- Made in the USA
- Package dimensions: 1.0 inches (H) x 4.0 inches (L) x 3.0 inches (W)
Full Specifications
| Brand | Kester |
|---|---|
| Color | White |
| Hardness | H |
| Ink Base | Water |
| Grip Type | Contoured |
| Ink Color | White |
| Line Size | 0.5mm |
| Body Shape | Round |
| Model Name | 2331ZX |
| Unit Count | 1 Count |
| Drill Point | Medium |
| Closure Type | Snap |
| Model Number | 83-1097-2331 |
| Material Type | Glass |
| Item Type Name | Kester 2331ZX Water Soluble Flux Pen |
| Hand Orientation | Ambidextrous |
| Package dimensions | 1.0 inches (H) x 4.0 inches (L) x 3.0 inches (W) |
| Additional Features | Water Soluble |
| Age Range Description | Adult |
| Artistic Charcoal Form | White Charcoal |
Ready to buy?
Kester Flux Formula 2331-ZX Water Soluble Flux Pen by Kester is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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