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💡 Flux your way to flawless soldering—clean, precise, and professional every time!
The Kester 2331-ZX Water Soluble Flux Pen is a precision-engineered soldering aid featuring a neutral pH, water-soluble organic acid flux that ensures superior ionic cleanliness without corrosive effects. Designed for both leaded and lead-free circuit board assemblies, it offers odorless application and minimal foaming during cleaning, making it ideal for high-reliability electronics manufacturing and rework. Compact and easy to use, this USA-made flux pen enhances productivity while reducing environmental impact and cleaning costs.
| ASIN | B0195UY2WW |
| Additional Features | Water Soluble |
| Age Range Description | Adult |
| Artistic Charcoal Form | White Charcoal |
| Best Sellers Rank | #143,758 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #140 in Soldering Flux |
| Body Shape | Round |
| Brand Name | Kester |
| Closure Type | Snap |
| Color | White |
| Customer Reviews | 4.2 4.2 out of 5 stars (65) |
| Drill Point | Medium |
| Global Trade Identification Number | 00642008525385 |
| Grip Type | Contoured |
| Hand Orientation | Ambidextrous |
| Hardness | H |
| Ink Base | Water |
| Ink Color | White |
| Item Type Name | Kester 2331ZX Water Soluble Flux Pen |
| Item Weight | 0.01 Ounces |
| Line Size | 0.5mm |
| Manufacturer | Kester |
| Material Type | Glass |
| Model Name | 2331ZX |
| Model Number | 83-1097-2331 |
| UPC | 642008525385 |
| Unit Count | 1.0 Count |
| Writing Instrument Form | Ballpoint Pen |
A**Y
If you do electronics, you need a flux pen
I’ve been working on a few projects and this pen is a life saver. It quickly applies just the right amount of flux to clean the metal while soldering. There is no mess. I’ve used these pens for years and I swear by them. Highly recommend!
G**S
Best solution to that old bottle and brush.
The least messy, easiest to use most precise method of applying flux before soldering your connections. Every kit should have one.
R**N
Not a NO CLEAN flux
If you use this flux please keep in mind that this is not a no clean flux. If you leave this flux on the board it may interfere with sensitive circuits (such as clock oscillators). As long as you are alright with that, this is a very nice flux with good viscosity and cleaning properties.
J**E
Super high quality product the best in its class!
The items quality and it's a great company that makes these.. definitely good working on some arcade parts for cleaning the solder and even old crusty stuff on the PCB boards and contacts. Only giving it four stars because the shipping took like 2 weeks. I've never had anything from Amazon take that long it was obviously not coming from a warehouse but from a private seller coming from the East Coast and I live on the west coast. But outside of that the product is amazing and everything that it should be so if you don't mind waiting a little extra you're going to get a great product at a great price!
T**S
Best Flux I'v Ever Used
I've tried lots of different fluxes, including several from Kester. I honestly don't know why they even sell anything else. This flux is, without even a close second, the best flux I've ever used. If you think you're an ok solderer but it's not easy, get this flux. Throw away everything else you've ever bought, and use this instead. After using it, get the board wet (powered down, of course) and just brush off the flux. It's water soluble. Seriously, why do they even sell other stuff?
P**O
Worked like a charm.
I was having a hell of a time getting some audio quality 4% sliver solder to stick to some rhodium plated connectors. I got this pen, used in on the rhodium plating and the solder finally adhered properly, pretty amazing!
C**E
Perfect when doing SMD
Helps with soldering, very easy to use and convenient.
M**X
Good Product.
Good Product.
Trustpilot
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