--- product_id: 61297208 title: "LA-CO 22194 -Water Soluble, All Weather Copper Flux Paste for Soldering, Brush in Cap, Developed for Plumbing, 4 oz, Made in USA" brand: "la-co" price: "R384" currency: ZAR in_stock: true reviews_count: 9 category: "La Co" url: https://www.desertcart.co.za/products/61297208-la-co-22194-water-soluble-all-weather-copper-flux-paste store_origin: ZA region: South Africa --- # Water-soluble, no residue All-weather, hot & cold use Lead-free & non-toxic safety LA-CO 22194 -Water Soluble, All Weather Copper Flux Paste for Soldering, Brush in Cap, Developed for Plumbing, 4 oz, Made in USA **Brand:** la-co **Price:** R384 **Availability:** ✅ In Stock ## Summary > 🔥 Solder Smarter, Not Harder — Flux That Works as Hard as You Do 💧 ## Quick Answers - **What is this?** LA-CO 22194 -Water Soluble, All Weather Copper Flux Paste for Soldering, Brush in Cap, Developed for Plumbing, 4 oz, Made in USA by la-co - **How much does it cost?** R384 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/61297208-la-co-22194-water-soluble-all-weather-copper-flux-paste) ## Best For - la-co enthusiasts ## Why This Product - Trusted la-co brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safe & Sustainable:** Non-acidic, lead-free, and non-toxic—prioritizing your health and the environment. - • **Effortless Application:** Brush-in cap design cleans pipes on contact, enabling smooth, professional-grade solder flow. - • **Built for Every Climate:** All-weather paste performs flawlessly from freezing winters to scorching summers. - • **Clean & Clear Performance:** Water-soluble formula leaves zero residue, ensuring pristine plumbing connections. - • **Industry-Approved Reliability:** Meets ASTM B813 and NSF-61 standards for potable water safety and corrosion resistance. ## Overview LA-CO 22194 is a 4 oz water-soluble copper flux paste designed for plumbing soldering. It’s lead-free, non-toxic, and meets ASTM B813 and NSF-61 standards, ensuring safe use with potable water. Its all-weather formula performs reliably in extreme temperatures, while the brush-in cap allows easy application and pipe cleaning for smooth solder joints. ## Description Water Soluble Lead Free Flux, Water Soluble Paste, Organic, Working Range Below 800 Deg F, Specific Gravity 1.11, Container Type Jar, Container Size 4 oz BIC, For Joining Copper to Copper and Copper to Brass, Standards NSF-61G, ASTM-B814 Review: Works - Exactly what my husband wanted. It worked perfectly for him. He said it held stuff together and has kept it together. Review: Happy with purchase - Does what it says ## Features - Water-soluble paste won’t leave residue in water piping - Meets industry standard ASTM B813 and contains no zinc chloride to reduce corrosion concerns - Non-acid, non-toxic, and lead-free to eliminate safety concerns - Cleans pipe upon application, allowing solder to run more smoothly around the pipe - All-weather formula for use in hot and cold climates. Meets ANSI/NSF Std. 61 specifications for Potable Water use. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.6 out of 5 stars 1,090 Reviews | ## Images ![LA-CO 22194 -Water Soluble, All Weather Copper Flux Paste for Soldering, Brush in Cap, Developed for Plumbing, 4 oz, Made in USA - Image 1](https://m.media-amazon.com/images/I/71OrD7epoLL.jpg) ## Questions & Answers **Q: Since this is water soluble, can it be used on pcb's and electronics? will it corrode over time? it's non-acid.** A: NO....do not use this on electronics or pcb's as it will corrode with that green corrosion. I have tried it and that is what happens. In a water pipe it is fine as it all washes away naturally. **Q: I have a ring that snapped and i want to fix it, i can still wear the ring but the part where it snapped pinches the skin. can i use it on jewelry?** A: This would likely corrode the ring badly. Its removes oxidized layers so solder can stick to the base metal. It's very acidic and corrosive. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works *by C***Y on June 7, 2026* Exactly what my husband wanted. It worked perfectly for him. He said it held stuff together and has kept it together. ### ⭐⭐⭐⭐⭐ Happy with purchase *by W***T on August 28, 2026* Does what it says ### ⭐⭐⭐⭐⭐ Perfect for beginners learning soldering *by M***S on March 28, 2026* My husband and son needed flux for soldering as they’re learning and practicing. This was just what they needed — good quality and a great price. ## Frequently Bought Together - LA-CO 22194 -Water Soluble, All Weather Copper Flux Paste for Soldering, Brush in Cap, Developed for Plumbing, 4 oz, Made in USA - AIM Lead-Free Plumbing Solder, Silver Bearing, 0.125inch dia, 1/2 Lb Spool - Pro Grade - Acid Brushes - 36 Count 3/8 Inch Boar Hair Acid Flux Brushes --- ## 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.co.za/products/61297208-la-co-22194-water-soluble-all-weather-copper-flux-paste](https://www.desertcart.co.za/products/61297208-la-co-22194-water-soluble-all-weather-copper-flux-paste) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-07*