--- product_id: 47911860 title: "Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering" price: "$12.00" currency: USD in_stock: true reviews_count: 12 url: https://www.desertcart.us/products/47911860-mercury-soldering-flux-30g-high-quality-flux-for-reliable-joints store_origin: US region: United States of America --- # Better solder flow for flawless joints Compact 30g tin, portable & handy Prevents oxidation, ensures durability Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering **Price:** $12.00 **Availability:** ✅ In Stock ## Summary > 🛠️ Elevate your solder game—don’t let weak joints hold you back! ## Quick Answers - **What is this?** Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - **How much does it cost?** $12.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/47911860-mercury-soldering-flux-30g-high-quality-flux-for-reliable-joints) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Oxidation Defense:** Protect metal surfaces from corrosion to guarantee long-lasting, reliable connections. - • **Versatile Mastery:** Ideal for electronics, jewelry, and all your DIY soldering projects—one flux to rule them all. - • **Compact Powerhouse:** Portable 30g tin fits perfectly in your toolkit for on-the-go precision repairs. - • **Flawless Solder Flow:** Achieve smooth, professional-grade joints every time with enhanced solder fluidity. - • **Effortless Application:** Easy-to-use formula that speeds up your workflow and reduces heat exposure risks. ## Overview Mercury Soldering Flux 30g is a high-quality flux designed to improve solder flow and prevent oxidation, ensuring strong, durable joints. Its compact tin makes it perfect for professionals and hobbyists tackling electronics, jewelry, and general soldering tasks, delivering reliable, clean results every time. ## Description From the manufacturer Mercury | Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints | Essential for Electronics and DIY Soldering Ensure every soldering project is successful with MERCURY Soldering Flux. Designed to improve the flow of solder, it helps create strong, clean joints while preventing oxidation. Perfect for electronics, crafts, and DIY repairs, this flux makes soldering easier and more professional-looking. Its compact 30g tin is ideal for hobbyists and professionals alike, providing reliable performance every time. PRODUCT FEATURES Better Solder Flow | Facilitates smooth and even soldering for professional results Prevents Oxidisation | Protects metal surfaces, ensuring strong, durable joints Easy to Use | Comes in a handy 30g tin that’s simple to apply and store Versatile Application | Suitable for electronics, jewellery, and general soldering tasks Compact and Portable | Small size fits in toolkits for on-the-go repairs and projects SPECIFICATION Dimensions: 15 x 40mm diameter Weight: 30g (content), 50g total including container Type: Soldering flux for electronic and general soldering Application: Prevents dry joints and oxidation during soldering Brand: MERCURY BOX CONTAINS 1 x MERCURY Soldering Flux 30g tin Review: The Easy Way to Solder Leads - I purchased this solder paste to assist in quickly soldering the ends of leads for various applications covering industrial, domestic and musical applications. I have always found that when using a reasonably hot soldering iron it is sometimes not easy to add solder to the end of a lead as the usual scenario is that the insulation starts to melt on the cable before the multicore solder flux can run down and prepare the cable for the solder. Sometimes the cable that you are soldering may not contact the heat as efficiently as it should and also the cable may be old and tarnished, but using solder paste makes life much easier. I have always found that dipping the prepared tip of the cable into a good quality soldering paste is the easiest way of producing the best results and when you touch the tip of the cable with the molten solder on the iron, the solder immediately runs down into the cores of the cable with very little deformation of the insulation. Of course this does depend on the type and quality of the cable and insulation, the worst I have found is on low cost audio cable as the slightest overheating causes the cable to melt through the wall of the insulation, also budget Din plugs and sockets usually will take very little heat without deforming and when soldering multicore plugs it is very easy to overheat the pins and they start to become unstable and loose. I have found that this solder paste is very good quality and does what it says on the tin, I have used it to make up several set of leads from computer to musical instrument and some appliance connections. The secret when soldering on all types of leads is use as little heat duration as possible and with the use of a good quality paste applied to the very tip of the cable or contact being soldered helps greatly in reducing the time spent soldering the end of the cable or the contact, a very good product and highly recommended. Review: Works great - Works great ## Features - Causes severe skin burns and eye damage. - May cause respiratory irritation. - Toxic to aquatic life with long lasting effects. - Better Solder Flow | Facilitates smooth and even soldering for professional results - Prevents Oxidisation | Protects metal surfaces, ensuring strong, durable joints - Easy to Use | Comes in a handy 30g tin that’s simple to apply and store - Versatile Application | Suitable for electronics, jewellery, and general soldering tasks - Compact and Portable | Small size fits in toolkits for on-the-go repairs and projects ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003JFVCYG | | Best Sellers Rank | 103,789 in DIY & Tools ( See Top 100 in DIY & Tools ) 20 in Solder Fluxes | | Guaranteed software updates until | unknown | | Item model number | 703.003 | | Manufacturer | Mercury | | Product Dimensions | 1 x 1 x 1 cm; 50 g | ## Images ![Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - Image 1](https://m.media-amazon.com/images/I/51KbZciRiIL.jpg) ![Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - Image 2](https://m.media-amazon.com/images/I/51TBABYH1hL.jpg) ![Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - Image 3](https://m.media-amazon.com/images/I/51WrA0I0OQL.jpg) ![Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - Image 4](https://m.media-amazon.com/images/I/51V-JgFn8uL.jpg) ![Mercury Soldering Flux 30g – High-Quality Flux for Reliable Joints, Prevents Oxidisation and Dry Joints Essential for Electronics and DIY Soldering - Image 5](https://m.media-amazon.com/images/I/51V291SFrOL.jpg) ## Questions & Answers **Q: I'm using a gas soldering iron to solder thin alarm cable, i find the solder doesn't stick to the wire and keeps rolling off, will this product help?** A: I found that corrosion of the wire is what causes solder not to stick. Cleaning the copper with sandpaper until it is bright and shiney should fix it. I also tried soaking the wire end in a solution of vinegar and salt for 10 minutes. Then dunk the wire end in baking soda and water to neutralize the acid and stop further corrosion. I did not find that the flux was the fix. **Q: Somehow I thought I was ordering tinning paste, but landed up ordering this. Would this work for tinning tips?** A: No it is acid based and I read on a document you should not use acid based paste. There is tinning pastes on sale for approx £5 **Q: Is this OK to use for soldering rc battery bullets?** A: I know it's late but yes, you can use this for bullets, I've soldered bullet connectors with and without flux. It will work fine **Q: Is this suitable for silver solder for Flame soldering brass to brass?** A: I have used it for soldering in model railway work with wiring and it helped. It was a recommended solder for model railway work. We did try to solder some silver jewellery without success ## Customer Reviews ### ⭐⭐⭐⭐⭐ The Easy Way to Solder Leads *by T***T on 6 January 2013* I purchased this solder paste to assist in quickly soldering the ends of leads for various applications covering industrial, domestic and musical applications. I have always found that when using a reasonably hot soldering iron it is sometimes not easy to add solder to the end of a lead as the usual scenario is that the insulation starts to melt on the cable before the multicore solder flux can run down and prepare the cable for the solder. Sometimes the cable that you are soldering may not contact the heat as efficiently as it should and also the cable may be old and tarnished, but using solder paste makes life much easier. I have always found that dipping the prepared tip of the cable into a good quality soldering paste is the easiest way of producing the best results and when you touch the tip of the cable with the molten solder on the iron, the solder immediately runs down into the cores of the cable with very little deformation of the insulation. Of course this does depend on the type and quality of the cable and insulation, the worst I have found is on low cost audio cable as the slightest overheating causes the cable to melt through the wall of the insulation, also budget Din plugs and sockets usually will take very little heat without deforming and when soldering multicore plugs it is very easy to overheat the pins and they start to become unstable and loose. I have found that this solder paste is very good quality and does what it says on the tin, I have used it to make up several set of leads from computer to musical instrument and some appliance connections. The secret when soldering on all types of leads is use as little heat duration as possible and with the use of a good quality paste applied to the very tip of the cable or contact being soldered helps greatly in reducing the time spent soldering the end of the cable or the contact, a very good product and highly recommended. ### ⭐⭐⭐⭐⭐ Works great *by B***T on 28 October 2025* Works great ### ⭐⭐⭐⭐ Solder *by A***E on 12 August 2025* Good buy ## Frequently Bought Together - Solder Flux | 30g (Package may vary) - Solder Wire 0.8mm Soldering Wire Lead Free Sn99.3 Cu0.7 with Rosin Core for Electronic Electrical Soldering Components Repair and DIY(20g) - Soldering Iron Kit, Tabiger 60W Welding Tools with Adjustable Temp 200-450°C and ON/Off Switch, 5 Soldering Tips, Desoldering Pump, Solder Wire, Wire Stripper Cutter, Stand, Tool Case --- ## 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.us/products/47911860-mercury-soldering-flux-30g-high-quality-flux-for-reliable-joints](https://www.desertcart.us/products/47911860-mercury-soldering-flux-30g-high-quality-flux-for-reliable-joints) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-14*