--- product_id: 255721915 title: "1186 Liquid Aluminum Stop Leak - 16.9 oz" brand: "bar's leaks" price: "€ 42.55" currency: EUR in_stock: true reviews_count: 13 category: "Bar's Leaks" url: https://www.desertcart.hr/products/255721915-1186-liquid-aluminum-stop-leak-16-9-oz store_origin: HR region: Croatia --- # Xtreme Cool™ tech reduces overheating Seals leaks instantly in all radiator types 16.9 oz powerful liquid formula 1186 Liquid Aluminum Stop Leak - 16.9 oz **Brand:** bar's leaks **Price:** € 42.55 **Availability:** ✅ In Stock ## Summary > 🚗 Seal the deal, beat the heat, and drive worry-free! ## Quick Answers - **What is this?** 1186 Liquid Aluminum Stop Leak - 16.9 oz by bar's leaks - **How much does it cost?** € 42.55 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/255721915-1186-liquid-aluminum-stop-leak-16-9-oz) ## Best For - bar's leaks enthusiasts ## Why This Product - Trusted bar's leaks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Thousands:** 4.3-star rated with over 3,500 reviews, a must-have for proactive vehicle care. - • **Instant Leak Sealing Power:** Stops leaks in plastic, aluminum, copper & steel radiators without draining. - • **System Conditioning Formula:** Not just a sealant—conditions your cooling system for long-term reliability. - • **Universal Coolant Compatibility:** Works flawlessly with all silicate & non-silicate antifreeze blends. - • **Advanced Xtreme Cool™ Technology:** Lowers water temperature to prevent overheating and extend engine life. ## Overview Bar's Leaks 1186 Liquid Aluminum Stop Leak is a scientifically formulated 16.9 oz liquid solution designed to permanently seal coolant leaks in radiators and heater cores. Featuring Xtreme Cool™ technology, it reduces engine overheating and is compatible with all types of antifreeze. Easy to use without draining, it works instantly on plastic, aluminum, copper, and steel components, making it a top-rated choice for proactive automotive maintenance. ## Description Bar’s Leaks® Liquid Aluminum Radiator & Heater Core Stop Leak is the best radiator stop leak money can buy. Scientifically formulated to permanently seal coolant leaks that are the cause of most overheating problems. Liquid Aluminum is part of the next generation stop leak line which not only seal leaks, but also conditions the system. Contains Xtreme Cool™ which stops overheating and reduces water temperature. It is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. It will not harm the cooling system, no draining is required. Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water. For most vehicles leaks seal instantly. Review: Must Try. - Looks like it worked. No more leaks. Review: Stopped leak - Stopped leak in the engine block. Good product. Bought 2nd time and used in lexus as a preventive measure for any future leaks or problems. ## Features - Item Category: Auto Part - Item Trademark: Bar's Leaks - manufacturer: Bar'S Products Inc ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002696FA2 | | Best Sellers Rank | #19,823 in Automotive ( See Top 100 in Automotive ) #92 in Automotive Fillers, Adhesives & Sealants | | Brand Name | Bar's Leaks | | Container Type | Bottle | | Customer Reviews | 4.3 4.3 out of 5 stars (3,548) | | Global Trade Identification Number | 00046087011867 | | Included Components | 1 Bottle Rislone 4405 Engine Oil Supplement, 11oz | | Item Form | Liquid | | Item Type Name | Liquid Aluminum Radiator and Heater Core Stop Leak | | Item Weight | 0.8 Pounds | | Liquid Volume | 16.9 Fluid Ounces | | Manufacturer | Bar's Leaks | | Material | Plastic | | Model Number | 1186 | | Number of Items | 1 | | Part Number | 1186 | | Recommended Uses For Product | Automotive | | Specific Uses For Product | Prevent Corrosion | | UPC | 046087011867 | | Unit Count | 1 Count | ## Product Details - **Brand:** Bar's Leaks - **Item weight:** 0.8 Pounds - **Liquid volume:** 16.9 Fluid Ounces - **Material:** Plastic - **Package information:** Bottle ## Images ![1186 Liquid Aluminum Stop Leak - 16.9 oz - Image 1](https://m.media-amazon.com/images/I/710LVf+KX5S.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: My radiator leaking from the seam. Slightly overheating. Will this seal at the seam?** A: It should,depending on how big the leak/crack is,the one on my semi truck was dripping big,half a gallon a day,I was worried bc that s a $2,000.00 repair,I bought it not expecting any results,since I had previously used Bars leak (the small silver bottle) and didn t work,so this was a prayer and a last hope, 5,000 mls later and not a leak,not extra coolant added,it is liquid aluminum,so it bonds to wherever the leak is and forms a sealing coat...I think of it as welding from the inside...I hope it works for you as it did for me,it really was an answer to prayer...I know I m a bit dramatic but it was.PS,try to follow recommended amount or as close as recommended,not much less and not much more,I used 2 bottles on a 11 gal radiator.God bless. **Q: can it be used in a Tahoe plastic tank** A: i used it in my volvo which has a plastic expansion tank and no problems. it won't fix big leaks but if you're losing just a little coolant over time and can't find the leak this is the stuff to use! **Q: My volkswagen golf gti 2018 doesn’t have a radiator cap can i still put it in a coolant reservoir to seal my radiator leak?** A: If direct access to radiator is not available, install in overflow tank. Please ensure overflow is pressurized before adding. DIRECTIONS Allow engine to cool. Make sure engine is cool enough so radiator cap can be safely removed. Shake well. Pour Bar’s Leaks Liquid Aluminum directly into radiator. One bottle treats systems up to 4 gallons. Use 1/2 bottle in 3 and 4 cylinder engines. TIP: If direct access to radiator is not available, install in overflow tank. Fill radiator and overflow tank to proper level and reinstall radiator cap. Drive/idle engine for 15 to 20 minutes. If leak continues, second application may be required or mechanical attention is needed. For severe leaks, like a blown head gasket, it is recommended to use Bar’s Leaks Head Gasket Fix or Blown Head Gasket Repair. Leave Bar’s Leaks Liquid Aluminum in cooling system for continued protection. If you have any other technical questions, feel free to contact our Technical Service Professionals at 800-345-6572 or if you would prefer you can use the contact us page on our website. **Q: will this work on the head also?** A: Try it...it's inexpensive. Whether it works depends on the specifics of your problem. I tried it on a 4 cylinder BMW with a new head and profile gasket and a slow leak. It worked great. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Must Try. *by Z***R on 1 January 2026* Looks like it worked. No more leaks. ### ⭐⭐⭐⭐⭐ Stopped leak *by A***R on 18 January 2024* Stopped leak in the engine block. Good product. Bought 2nd time and used in lexus as a preventive measure for any future leaks or problems. ### ⭐⭐⭐⭐ Genie in a bottle. *by H***I on 7 September 2022* IT WORKS!! stops small leaks in any type of radiator with minimum effort, just follow the directions but don't forget to drain some coolant before adding the product (about 1 litre) then top up later. ## Frequently Bought Together - Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz. - PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems - Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems --- ## 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/255721915-1186-liquid-aluminum-stop-leak-16-9-oz](https://www.desertcart.hr/products/255721915-1186-liquid-aluminum-stop-leak-16-9-oz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-09*