--- product_id: 257815528 title: "Bar's Leaks CONCENTRTD REAR MAIN SEAL" brand: "bar's leaks" price: "€ 42.27" currency: EUR in_stock: true reviews_count: 10 category: "Bar's Leaks" url: https://www.desertcart.nl/products/257815528-bars-leaks-concentrtd-rear-main-seal store_origin: NL region: Netherlands --- # Stops leaks within 100 miles/2 days Seals multiple engine oil leaks Made in USA, trusted 70-year legacy Bar's Leaks CONCENTRTD REAR MAIN SEAL **Brand:** bar's leaks **Price:** € 42.27 **Availability:** ✅ In Stock ## Summary > 🛠️ Fix leaks like a pro—because your engine deserves the best! ## Quick Answers - **What is this?** Bar's Leaks CONCENTRTD REAR MAIN SEAL by bar's leaks - **How much does it cost?** € 42.27 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/257815528-bars-leaks-concentrtd-rear-main-seal) ## 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 - • **Rapid Relief:** Most leaks stop within 100 miles or 2 days—get back on the road faster - • **Easy Application:** Simply add to crankcase oil at oil change—no mechanic needed - • **Trusted Heritage:** 70 years of expertise and made in the USA for reliable performance - • **Multi-Leak Master:** Seals rear main, timing cover, cam seals & more with one powerful formula - • **Seal Restoration Tech:** Restores seal elasticity lost to heat and age, extending engine life ## Overview Bar's Leaks Concentrated Rear Main Seal is a high-performance engine oil additive designed to restore seal flexibility and build a protective polymer film that stops rear main and other hard-to-fix oil leaks. Trusted for over 70 years and made in the USA, it works quickly—most leaks stop within 100 miles or 2 days—offering an affordable, mechanic-free solution to keep your engine running smoothly. ## Description From the manufacturer Does Your Vehicle Leak Oil? If Yes, then You've Navigated to the Right Place. Bar's Leaks has got You Covered. This product works in two ways to help solve most any seal type leak. 1) The seal restorer additive restores seal size, flexibility and elasticity lost due to engine heat, age and high mileage. 2) The seal polymer works by building a polymeric film around the rear main seal and also filling in any groove worn into the crankshaft by the seal. What are the symptoms of a rear main seal leak? Depending on the severity of the leak the first thing you may notice is the oil level going down. The next thing that happens is spotting, where you will find oil spots, located on the driveway or garage. Will Bar’s Leaks Rear Main Seal Repair work on other oil leaks? Yes. Even though it is specially designed to seal rear main leaks, it also works better than a conventional stop leak on all other engine oil leaks. This includes the timing cover seal, cam seals, O-rings and other seals and gaskets. Questions to Ask Yourself? Is my oil level low? Is the leaking fluid dark and or golden brown? Is my engine getting hot or running rough? Do I really want to pay for an expensive mechanic? If you answered YES to any of these questions than Bar's Leaks Enigne Oil Stop Leak is for you. About Bar's Leaks Bar’s Leaks is more than just a stop-leak company. We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do. Each individual Bar’s Leaks product is formulated and manufactured right here in the U.S.A. We’re committed to creating fast and affordable products that fit perfectly into your lifestyle and budget. Choose Bar’s Leaks, so you can discover just how simple automotive maintenance can be when you have the right tools. Review: Quick delivery - Perfect Review: Didn't stop the leak... - Didn't stop the leak for me, but for sure it got better....I was told by the mechanic that with the next oil change I'll have to add another bottle and the leak will stop. ## Features - Seals timing cover, cam seal, rear main and other hard to stop oil leaks - Add to engine oil - Specifically designed to seal rear main leaks, but also works better than a conventional stop leak on all other leaks - Add entire bottle of Rear Main Seal Repair to engine crankcase (where you add oil) at or between oil changes. Do not overfill. Most leaks will stop within 100 miles or 2 days of driving ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00754T6TK | | Best Sellers Rank | #59,348 in Automotive ( See Top 100 in Automotive ) #267 in Oil & Fluid Additives | | Brand | Bar's Leaks | | Brand Name | Bar's Leaks | | Container Type | Bottle | | Customer Reviews | 4.2 out of 5 stars 2,791 Reviews | | Global Trade Identification Number | 00046087010402 | | Included Components | One bottle Bar's Leaks Rear Main Seal Repair | | Item Form | Liquid | | Item Type Name | Bar's Leaks Rear Main Seal Repair | | Item Weight | 1.1 Pounds | | Item weight | 1.1 Pounds | | Liquid Volume | 16.9 Fluid Ounces | | Liquid volume | 16.9 Fluid Ounces | | Manufacturer | Bar's Leaks | | Material | Chemical | | Model Number | 1040 | | Number of Items | 1 | | Package information | Bottle | | Part Number | 1040 | | Recommended Uses For Product | Automotive | | Recommended uses for product | Automotive | | Specific Uses For Product | Sealing engine oil leaks | | UPC | 046087010402 | | Unit Count | 16.9 Milliliters | ## Product Details - **Brand:** Bar's Leaks - **Item weight:** 1.1 Pounds - **Liquid volume:** 16.9 Fluid Ounces - **Material:** Chemical - **Package information:** Bottle ## Images ![Bar's Leaks CONCENTRTD REAR MAIN SEAL - Image 1](https://m.media-amazon.com/images/I/71BWlf2ZPcL.jpg) ![Bar's Leaks CONCENTRTD REAR MAIN SEAL - Image 2](https://m.media-amazon.com/images/I/816-v04DEXL.jpg) ![Bar's Leaks CONCENTRTD REAR MAIN SEAL - Image 3](https://m.media-amazon.com/images/I/41X0xUy+9EL.jpg) ## Questions & Answers **Q: Is this safe for diesels, specifically the Duramax 6.6L?** A: Yes..... According to Bars Product, this is compatible with all engines and engine oils. **Q: Can you use this with synthetic oils** A: Yes, I have used it with synthetic oil with no issues. **Q: What it does with my other gasket that has not have a leak?** A: If I'm understanding your question correctly.... you would like to know what effect this has on gaskets that are not leaking? The answer is nothing..... Thank you Eric **Q: Is this safe to use with other gas additives such as seafoam, lucas?** A: Yes there is no problem. This gets poured into your oil crankcase not into your gasoline. Seafoam usually gets poured into your gas tank to clean injectors and cylinder walls sometimes you can put it in the crankcase just about 4 oz to clean junk this does not stop any leaks usually done 100 or 200 mi before an oil change. Lucas has many products some that are injector cleaners that go into the fuel tank some that are oil stabilizers or stop leaks or friction additives that go into your oil crankcase you can have Lucas oil additive/stop leak and bars leak in your oil crankcase they don't interfere with one another ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quick delivery *by D***U on 17 November 2023* Perfect ### ⭐⭐⭐ Didn't stop the leak... *by A***H on 28 September 2022* Didn't stop the leak for me, but for sure it got better....I was told by the mechanic that with the next oil change I'll have to add another bottle and the leak will stop. ### ⭐ NOT WORKING *by P***Y on 12 December 2020* NOT WORKING ## Frequently Bought Together - Bar's Leaks Rear Main Seal Repair, 16.9 oz - Bar's Leaks OS-1 Oil Seal Engine Oil Burning and Leak Repair, 16.9 oz. - Bar's Leaks 1420 Transmission Stop Leak - 11 oz. , Grey --- ## 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.nl/products/257815528-bars-leaks-concentrtd-rear-main-seal](https://www.desertcart.nl/products/257815528-bars-leaks-concentrtd-rear-main-seal) --- *Product available on Desertcart Netherlands* *Store origin: NL* *Last updated: 2026-07-06*