--- product_id: 47245282 title: "Copper Lock 10 ml, No Heat Liquid Solder for Copper, Brass & Yellow Metals, Instant Leak Proof Seal up to 500 PSI, -60°F to +300°F, Bonding Solution for Plumbing & HVAC (10-801)" brand: "comstar" price: "VT5824" currency: VUV in_stock: true reviews_count: 13 category: "Com Star" url: https://www.desertcart.vu/products/47245282-copper-lock-10-ml-no-heat-liquid-solder-for-copper store_origin: VU region: Vanuatu --- # Withstands up to 500 PSI pressure No torch, no flame needed 60-second instant bond Copper Lock 10 ml, No Heat Liquid Solder for Copper, Brass & Yellow Metals, Instant Leak Proof Seal up to 500 PSI, -60°F to +300°F, Bonding Solution for Plumbing & HVAC (10-801) **Brand:** comstar **Price:** VT5824 **Availability:** ✅ In Stock ## Summary > 🔧 Seal it fast, seal it strong — no flame, no fuss! ## Quick Answers - **What is this?** Copper Lock 10 ml, No Heat Liquid Solder for Copper, Brass & Yellow Metals, Instant Leak Proof Seal up to 500 PSI, -60°F to +300°F, Bonding Solution for Plumbing & HVAC (10-801) by comstar - **How much does it cost?** VT5824 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/47245282-copper-lock-10-ml-no-heat-liquid-solder-for-copper) ## Best For - comstar enthusiasts ## Why This Product - Trusted comstar brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Leak Fix in 60 Seconds:** Stop pinhole leaks fast without draining your system or using heat. - • **Safe for Tight & No-Burn Zones:** Perfect for repairs near insulation or drywall where open flames are a hazard. - • **Torch-Free Professional Bonding:** Replace bulky solder kits with a clean, no-flame liquid solder solution. - • **High-Pressure HVAC Grade Sealant:** Reliable performance up to 500 PSI and extreme temperatures (-60°F to 300°F). - • **Military-Spec Strength & Versatility:** Exceeds US Military specs and works on copper, brass, and yellow metals. ## Overview ComStar Copper Lock is a 10 ml liquid solder designed for permanent pinhole leak repairs on copper and brass pipes. It creates a professional-grade, torch-free bond in just 60 seconds, withstanding pressures up to 500 PSI and temperatures from -60°F to 300°F. Ideal for HVAC and plumbing professionals or DIYers needing a fast, safe, and reliable seal in tight or flame-restricted spaces. ## Description ComStar Copper Lock, 10 ml, Liquid Solder for Copper & Brass Pipes, Permanent Pinhole Leak Fix & Pipe Repair, No Torch Plumbing Adhesive, High Pressure HVAC Sealant Up to 500 PSI (10-801): Electrical Outlet Switches: desertcart.com: Tools & Home Improvement Review: Works great, connected two pipe joints R-22 and no leaks after 6pm the - Wow! This worked great. A friend of mine said it wouldn’t work, but I had a rusted leaking receiver drier on my old R-22 system, I cut it out and replaced with a new one and used this to reconnect it and no leaks, system has been performing great for 6 months now. Even more impressive is that this is close to the condenser and gets a lot of vibration and it’s holding up great Review: Worked perfect for my application - I replaced my gas water heater and needed to reattach the copper overflow pipe from the pressure release valve. I don’t have experience with copper solder so this was a great alternative. Very easy to use and appears to be a solid bond. I honestly don’t know if I would trust it if the copper pipe was under constant water pressure but for my application it is perfect. If the pressure relief valve pops and water flows into the overflow pipe I am having a bad day and it isn’t going to matter if the pipe leaks a little! ## Features - THE ULTIMATE PINHOLE LEAK FIX: Stop leaks instantly without draining the entire system. Copper Lock is the #1 solution for copper pipe pinhole leak repairs and emergency plumbing fixes where a torch is too dangerous or inconvenient. - REPLACES BULKY SOLDERING KITS: Why buy a full plumbing soldering kit? This 2 oz bottle provides a professional-grade "liquid solder" bond that exceeds US Military specs. No flux, no heat, and no heavy equipment required. - INSTANT 60-SECOND BOND: Achieve a leak-proof, permanent seal in under a minute. Perfect for HVAC technicians and DIYers who need a fast-acting joint solution for copper, brass, and yellow metals (Soldadura para cobre). - HIGH-PRESSURE HVAC RELIABILITY: Engineered for extreme environments, it withstands up to 500 PSI of contained pressure and temperatures from -60°F to +300°F. Compatible with all refrigerants and common household liquids. - SAFE FOR TIGHT SPACES: Ideal for repairs near insulation, drywall, or wood studs where an open flame is a fire hazard. Create a gas-tight, permanent bond in "no-burn" zones with ease. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004Y758Z2 | | Best Sellers Rank | #14,687 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #40 in Solder | | Brand Name | ComStar | | Color | Red | | Compatible Material | Copper, Brass, Yellow Metals | | Container Type | Bottle | | Customer Reviews | 4.2 4.2 out of 5 stars (1,107) | | Full Cure Time | 1 Minutes | | Global Trade Identification Number | 00024924108017 | | Included Components | Liquid | | Item Form | Liquid | | Item Package Quantity | 1 | | Manufacturer | Comstar | | Material Type | copper | | Model | 10-801 | | Other Special Features of the Product | Environmentally friendly, instant bonding, high-performance | | Specific Uses For Product | Industrial Use | | UPC | 024924108017 | | Viscosity | Medium viscosity | | Volume | 0.34 Fluid Ounces | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** ComStar - **Item Form:** Liquid - **Material:** copper - **Special Feature:** Environmentally friendly, instant bonding, high-performance - **Specific Uses For Product:** Industrial Use ## Images ![Copper Lock 10 ml, No Heat Liquid Solder for Copper, Brass & Yellow Metals, Instant Leak Proof Seal up to 500 PSI, -60°F to +300°F, Bonding Solution for Plumbing & HVAC (10-801) - Image 1](https://m.media-amazon.com/images/I/81gM8rNSHbL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can I use it to fix a tiny leak at copper pipe connection ? Thanks** A: No. This is for attaching two copper pipes together, and it will need to cure for a little while before it gets wet. It won't help with an existing leak. I would try plumbers' putty, and if that doesn't help with the leak, you may need to pull the pipes apart. It'll cost a little money, but a plumber will be a big help. **Q: Has anyone tried using this on flared hvac fittings that are having a problem getting a good seal?** A: No, not tried. But can only imagine it would work well. However, flared hvac fittings shouldn’t really need this as they use threats, ferrules, and viton seals, correct? Anyway, I would just do an experiment: spend 10 on a bottle, assemble a capped tube using said flared fittings, and pressurize (standard pancake-style or alike 1XX psi compressor for pneumatic tools etc). Report back if pressure holds (compared to the control - compressor alone is good) ;) **Q: Can it be used for jewlery making** A: Probably not. I don’t think it would hold up to constant movement. I think it was a solderless method of bonding copper tubing and elbows together without using a torch and solder. **Q: I have a turntable that only works on one channel, thinking there's a bad connection internally. Would this product work for this?** A: I had the same problem but after readjusting the two screws that attach the cartridge to the headshell the problem is fixed so I figured out the problem was the needle was not fit in the vinyl correctly, if it leans on one side then it only works on the channel it leans on, hopes it helps ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great, connected two pipe joints R-22 and no leaks after 6pm the *by P***P on January 29, 2026* Wow! This worked great. A friend of mine said it wouldn’t work, but I had a rusted leaking receiver drier on my old R-22 system, I cut it out and replaced with a new one and used this to reconnect it and no leaks, system has been performing great for 6 months now. Even more impressive is that this is close to the condenser and gets a lot of vibration and it’s holding up great ### ⭐⭐⭐⭐⭐ Worked perfect for my application *by K***N on January 29, 2026* I replaced my gas water heater and needed to reattach the copper overflow pipe from the pressure release valve. I don’t have experience with copper solder so this was a great alternative. Very easy to use and appears to be a solid bond. I honestly don’t know if I would trust it if the copper pipe was under constant water pressure but for my application it is perfect. If the pressure relief valve pops and water flows into the overflow pipe I am having a bad day and it isn’t going to matter if the pipe leaks a little! ### ⭐⭐⭐⭐⭐ Works as Wriitten its actually amazing and didnt expect the results too be so good *by M***A on August 3, 2025* Telling you what as in for not leaking and Fast clean hold.. This stuff is amazing .. bending the pipe back and forth under pressure yeah it will break but any mechanic and plumber knows compare it too locktight if you twist it enough or bend it it will break loose but a copper pipe in the wall or for a fix its as good as solder its amazing actually i never believed it would work... for the price and the big bottle you can do allot allot of pipe repairs for allot less money for solder and Map gas so a better value for the money for sure ## Frequently Bought Together - ComStar Copper Lock, No Heat Solder for Copper & Brass Pipes, Create A Permanent Leak-Proof Bond Instantly, Made in USA, 10 ml (10-801) - FiberWeld Pipe Repair Cast 2x48 Inch – High Strength Adhesive Fiberglass Wrap – White - Just For Copper JFC070 Epoxy Putty --- ## 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.vu/products/47245282-copper-lock-10-ml-no-heat-liquid-solder-for-copper](https://www.desertcart.vu/products/47245282-copper-lock-10-ml-no-heat-liquid-solder-for-copper) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-13*