--- product_id: 24837919 title: "Flux Formula 2331-ZX Water Soluble Flux Pen by Kester" brand: "kester" price: "€ 30.80" currency: EUR in_stock: true category: "Kester" url: https://www.desertcart.hr/products/24837919-flux-formula-2331-zx-water-soluble-flux-pen-by-kester store_origin: HR region: Croatia --- # Neutral pH for ionic cleanliness Water-soluble for easy cleaning Precision pen tip for targeted application Flux Formula 2331-ZX Water Soluble Flux Pen by Kester **Brand:** kester **Price:** € 30.80 **Availability:** ✅ In Stock ## Summary > 🛠️ Flux like a pro — clean, precise, and eco-smart soldering made simple! ## Quick Answers - **What is this?** Flux Formula 2331-ZX Water Soluble Flux Pen by Kester by kester - **How much does it cost?** € 30.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/24837919-flux-formula-2331-zx-water-soluble-flux-pen-by-kester) ## Best For - kester enthusiasts ## Why This Product - Trusted kester brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Odor-Free Workflow:** No offensive odors during soldering, creating a comfortable workspace for professionals. - • **Precision Application:** Ballpoint pen design with 0.5mm line size for exact flux placement on complex circuit boards. - • **Clean & Green Soldering:** Neutral pH flux ensures top ionic cleanliness without corrosion or damage. - • **Universal Compatibility:** Works flawlessly with both leaded and lead-free solder on conventional and surface mount assemblies. - • **Effortless Post-Solder Cleanup:** Water-soluble formula minimizes cleaning time and costs while meeting environmental standards. ## Overview The Kester 2331-ZX Water Soluble Flux Pen is a US-made, neutral pH organic acid flux designed for high-precision soldering of both leaded and lead-free circuit boards. Its water-soluble chemistry ensures superior ionic cleanliness and easy post-solder cleaning without damaging solder masks or laminates. Ideal for telecom, computer, and electronics manufacturing, it offers odorless application and reduces cleaning costs while complying with environmental regulations. ## 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 create excessive foaming in standard water cleaning systems. 2331-ZX Flux Pen has good soldering properties for improved productivity without sacrificing reliability of the assembly. This flux does not attack properly cured solder masks or FR-4 epoxy-glass laminate. 2331-ZX Flux Pen is not detrimental to the surface insulation resistance of the soldered assembly. Use of this flux minimizes cleaning costs while complying with environmental regulations. ## Features - Kester 2331ZX pen - 10ML - Made in the USA - Package dimensions: 1.0 inches (H) x 4.0 inches (L) x 3.0 inches (W) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0195UY2WW | | Additional Features | Water Soluble | | Age Range Description | Adult | | Artistic Charcoal Form | White Charcoal | | Best Sellers Rank | #129,725 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #111 in Soldering Flux | | Body Shape | Round | | Brand Name | Kester | | Closure Type | Snap | | Color | White | | Customer Reviews | 4.5 4.5 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 | | Recommended Uses For Product | Electronics manufacturing and repair, particularly for circuit board assemblies, with a focus on precision and targeted application | | UPC | 642008525385 | | Unit Count | 1.0 Count | | Water Resistance Level | Not Water Resistant | | Writing Instrument Form | Ballpoint Pen | ## Product Details - **Age Range (Description):** Adult - **Brand:** Kester - **Color:** White - **Ink Color:** White - **Writing Instrument Form:** Ballpoint Pen ## Images ![Flux Formula 2331-ZX Water Soluble Flux Pen by Kester - Image 1](https://m.media-amazon.com/images/I/51NdR4BS4yL.jpg) ## Frequently Bought Together - Kester 2331ZX Water Soluble Flux Pen, White - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components - Thermaltronics TMT-TC-2 Tip Tinner (20g) in 0.8oz Container --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/24837919-flux-formula-2331-zx-water-soluble-flux-pen-by-kester](https://www.desertcart.hr/products/24837919-flux-formula-2331-zx-water-soluble-flux-pen-by-kester) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-14*