--- product_id: 257815528 title: "Bar's Leaks CONCENTRTD REAR MAIN SEAL" brand: "bar's leaks" price: "321 kr" currency: DKK in_stock: true reviews_count: 10 url: https://www.desertcart.dk/products/257815528-bars-leaks-concentrtd-rear-main-seal store_origin: DK region: Denmark --- # Seals multiple engine oil leaks Stops leaks within 100 miles/2 days 16.9 fl oz concentrated formula Bar's Leaks CONCENTRTD REAR MAIN SEAL **Brand:** bar's leaks **Price:** 321 kr **Availability:** ✅ In Stock ## Summary > 🛠️ Fix leaks like a pro—because your engine deserves the best seal deal! ## Quick Answers - **What is this?** Bar's Leaks CONCENTRTD REAR MAIN SEAL by bar's leaks - **How much does it cost?** 321 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/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 - • **Trusted & Proven:** Top-ranked with 4.2 stars from 2,800+ users—join the leak-free community - • **Multi-Leak Master:** Seals rear main, timing cover, cam seals & more with superior polymer technology - • **Rapid Leak Relief:** Most leaks stop within 100 miles or 2 days—get back on the road faster - • **Seal Restoration Power:** Restores seal elasticity lost to heat and age, extending engine life - • **Easy Engine Integration:** Simply add to crankcase oil at oil change—no mess, no hassle ## Overview Bar's Leaks Concentrated Rear Main Seal is a 16.9 fl oz liquid additive designed to restore and seal engine oil leaks, especially rear main seals. It works by rebuilding seal flexibility and forming a protective polymer film, stopping leaks within 100 miles or 2 days. Compatible with multiple engine seals, it’s easy to use by adding directly to the crankcase oil during oil changes. Highly rated and trusted by thousands, it’s a must-have for maintaining engine integrity and preventing costly repairs. ## Description 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. 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. 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. ## 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 | #17,841 in Automotive (See Top 100 in Automotive) #132 in Oil & Fluid Additives | | Brand Name | Bar's Leaks | | Container Type | Bottle | | Customer Reviews | 4.2 4.2 out of 5 stars (2,831) 4.2 out of 5 stars | | 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 | 499 g | | Liquid Volume | 16.9 Fluid Ounces | | Manufacturer | Bar's Leaks | | Material | Chemical | | Model Number | 1040 | | Number Of Items | 1 | | Part Number | 1040 | | Recommended Uses For Product | Automotive | | Specific Uses For Product | Sealing engine oil leaks | | Unit Count | 16.9 Milliliters | | Upc | 046087010402 | ## 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 on Reviewed in the United Arab Emirates 17 November 2023* Perfect ### ⭐⭐⭐ Didn't stop the leak... *by on Reviewed in the United Arab Emirates 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 on Reviewed in the United Arab Emirates 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.dk/products/257815528-bars-leaks-concentrtd-rear-main-seal](https://www.desertcart.dk/products/257815528-bars-leaks-concentrtd-rear-main-seal) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-08-17*