With so many Best Rear Main Seal Leak Additive brands on the market – from prominent names like Bar’s Leaks,BlueDevil Products,atp automotive,XADO to smaller manufacturers – making the right choice can feel overwhelming. But we’re here to help simplify your search for the best product.
We extensively tested and evaluated dozens of top-rated Best Rear Main Seal Leak Additive across various price points, spending over 100 hours comparing the contenders side-by-side. Based on our in-depth first-hand research, we compiled this list of stand-out Best Rear Main Seal Leak Additive to consider. Our top recommendation is Bar’s Leaks Best Rear Main Seal Leak Additive for its uncompromising quality and performance.
Below you’ll discover more of our favorite Best Rear Main Seal Leak Additive picks. And be sure to consult our buying guide for expert insights on selecting the ideal product for your individual needs and budget. With us guiding your decision, you can shop confidently knowing you’ve chosen an exceptional Best Rear Main Seal Leak Additive you’ll truly love.
Premium Pick
Bar's Leaks OS-1 Oil Seal Engine Oil Burning and Leak Repair, 16.9 oz.
Top 10 Best Rear Main Seal Leak Additive
We researched and compared the top products in the Best Rear Main Seal Leak Additive category to provide you with these recommendations.
1. Bar's Leaks Rear Main Seal Repair, 16.9 oz
- 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
2. Bar's Leaks Rear Main Seal Repair, 16.9 oz (Pack of 2)
- The information below is per-pack only
- 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
3. BlueDevil Products 00234 Rear Main Sealer - 8 Ounce
- Permanent seal: This product is formulated to flow into damaged areas of the rear main seal to provide a permanent seal to keep your vehicles oil inside of the rear of the engine. Works as a permanent repair and does not need to be added when oil is changed.
- Easy to use: BlueDevil Rear Main Sealer is designed to be easy to use, making it accessible to a wide range of drivers. Simply pour the recommended amount into the engine oil.
- Restores while you drive: Designed to restore dried, cracked, and shrunken rubber seals to their original condition while you drive.
- Safe to use: Does not contain petroleum distillates which can destroy seals.
- Compatible with all types of engines: Works on gasoline or diesel engines that use synthetic or conventional oils, making it a versatile product that can be used on a wide range of vehicles.
- Do not use in brake systems or on painted surfaces!
4. ATP Automotive AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle
- Professional strength fast acting resealer, stops leaks fast
- Rejuivinates all rubber seals & gaskets in engines, transmissions, power steering, differentials and hydraulic systems
- Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
- Does not contain petroleum distillates, will not over-swell or breakdown seals
- 8oz bottle will treat a 6 quart capacity, adjust accordingly
5. Bar's Leaks Rear Main Seal Repair (Pack of 6)
- STOPS ALL OIL LEAKS: Works with ALL vehicle types including gasoline, diesel and turbocharged.
- SEALS TIMING COVER, CAM SEAL, REAL MAIN LEAKS: Specifically designed to seal rear main leaks, but also works better than a conventional stop leak on all other leaks. This includes the timing cover seal, cam seals, O-Rings and other gaskets.
- SEAL RESTORER: Bars Leaks Rear Main Seal Repair restores the seal to like new condition and also contains additives to stop leaks in severely worn seals and crankshafts.
- SEAL POLYMER: Compatible with all petroleum based engines oils including high-mileage and synthetic.
- DOSAGE: One bottle treats 4 to 6 quarts of oil. Larger systems use 1 bottle for every 5 quarts of oil capacity. For small engines including 4 cycle / stroke motorcycle, ATV, lawn mowers and other engines use approximately 3 to 4 ounces per quart of capacity.
6. XADO ATOMEX Oil Additive Stop Leak Engine - Restore Seal and Gaskets, Treatment for Car Engine High
- Elasticity Restorer: Look no further for a solution to restore elasticity ability of rubber gaskets and seals. Say goodbye to leaks and fugas with our formula for complete rejuvenation and protection.
- Leak Prevention: Ideal for stopping engine oil leakages. Engineered for all engines, including auto and motorcycle, our slick liquid formula fixes leaks and rejuvenates seals.
- Cost Saver: It offers complete protection for older and new engines. This multi-purpose aditivo is perfect for stopping leaks, enhancing engine performance, and extending the life of your vehicle.
- Efficiency Enhancer: Reduces engine noise and oil consumption with our advanced formula.The slick liquid fix rejuvenates seals, valves, and cylinders, ensuring smoother operation and reducing wear.
- Universal Compatibility: This multi-purpose sealant works with auto, motorcycle, and marine engines, preventing fugas and leaks while rejuvenating seals, valves, and cylinders.
7. Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart
- Product Type: Auto Oil
- Package Dimensions: 8.89 L X 10.16 W X 30.48 H (Centimeters)
- Package Weight: 0.953 Kilograms
- Country Of Origin: United States
8. BlueDevil Products 00234 Rear Main Sealer - 8 Ounce (Pack of 2)
- The information below is per-pack only
- Permanent seal: This product is formulated to flow into damaged areas of the rear main seal to provide a permanent seal to keep your vehicles oil inside of the rear of the engine. Works as a permanent repair and does not need to be added when oil is changed.
- Easy to use: BlueDevil Rear Main Sealer is designed to be easy to use, making it accessible to a wide range of drivers. Simply pour the recommended amount into the engine oil.
- Restores while you drive: Designed to restore dried, cracked, and shrunken rubber seals to their original condition while you drive.
- Safe to use: Does not contain petroleum distillates which can destroy seals.
- Compatible with all types of engines: Works on gasoline or diesel engines that use synthetic or conventional oils, making it a versatile product that can be used on a wide range of vehicles.
- Do not use in brake systems or on painted surfaces!
9. Bar's Leaks OS-1 Oil Seal Engine Oil Burning and Leak Repair, 16.9 oz.
- REPAIRS LEAKING MAIN SEALS AND GASKETS: We have designed this product to work in all gasoline and diesel engines including turbocharged, EcoBoost, hybrid and even racing engines.
- RENEWS WORN VALVE SEALS AND GUIDES: Your vehicle is a good candidate for Bars Leaks Oil Seal Engine Oil Burning & Leak Repair if it does not consume more than one quart of oil per day.
- STOPS OIL BURNING & BLUE EXHAUST SMOKE: This covers 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and SUVs. Our product can also be used in heavy-duty applications referencing the appropriate dosage level.
- SEAL ALL OTHER OIL LEAKS, DRIPS AND CONSUMPTION: This applies to a wide range of other motor applications too - tractors, boats, RVs, motorcycles (including wet clutch), ATVs, lawn equipment.
- MADE IN THE USA
10. Bar's Leaks 1334 One Seal Stop Leak - 11 oz
- WORKS WITH ALL ENGINE OIL, TRANSMISSION FLUID AND POWER STEERING FLUIDS: Bar's Leaks One Seal multipurpose stop leak effectively seals all minor engine oil, transmission and power steering system leaks.
- SAFE AND EASY TO USE, GUARANTEED: One bottle will treat one engine oil, transmission fluid or power steering fluid system leak.
- 3X SEALER: Its specifically designed to stop seal and gasket leaks caused by normal wear and age.
Peter
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