Top 9 Bars Rear Main Seal Stop Leak – Fuel Additives

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1. Bar's Leaks


Bar's Leaks Concentrated Rear Main Seal Repair, 16.9 oz

Bar's Leaks #ad - Do not overfill. Seals timing cover, cam seal, rear main and other hard to stop oil leaks. Add entire bottle of rear main seal repair to engine crankcase where you add oil at or between oil changes. Dosage: one bottle treats 4 to 6 quarts of oil. Most leaks will stop within 100 miles or 2 days of driving. Add to engine oil. Specifically designed to seal rear main leaks, but also works better than a conventional stop leak on all other leaks.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height7.7 Inches
Length1.9 Inches
Weight1.1 Pounds
Width3.4 Inches
Part Number1040

2. Bar's Leaks


16.9 oz., Bar's Leaks OS-1 Seal Engine Oil Burning/Leak Repair

Bar's Leaks #ad - Works in all gasoline and diesel engines including turbocharged, 5, 6, 4, 8 and 10 cylinder engines in all cars, trucks, including 3, Eco Boost, hybrid and even racing engines, vans and SUV's.

4 quarts of oil, in larger systems use 1 bottle for every 6 quarts, in small engines use approximately 3oz to every quart of oil. This premium quality synthetic blend works with all types of motor/engine oil including regular petroleum, high mileage, synthetic blends and fully synthetic formulas. In most cases the oil leak issue will be repaired with a single dosage. Can also be used in heavy-duty applications as well as tractors, boats, ATV's, motorcycles including wet clutch, RV's, lawn equipment. Use 1/2 bottle for smaller systems 3. 5 - 4. However, for best results and to prevent the problems from reoccurring, use with every other oil change, or once per year.
BrandBar's Leaks #ad
ManufacturerBar's Products #ad
Weight1.1 Pounds
Part NumberOS-1
WarrantySee Manufacturer

3. BlueDevil Products


BlueDevil Rear Main Sealer

BlueDevil Products #ad - Restores dried, Cracked and Shrunken Seals. Works in gas or Diesel Engines. Guaranteed Permanent Seal.
BrandBlueDevil Products #ad
ManufacturerBlueDevil Products #ad
Height2.5 Inches
Length6 Inches
Width2.5 Inches
Part Number00234

4. ATP Automotive


ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle

ATP Automotive #ad - Does not contain petroleum distillates, will not over-swell or breakdown seals. Rejuivinates all rubber seals & gaskets in engines, power steering, transmissions, differentials and hydraulic systems. Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil. Professional strength fast acting resealer, stops leaks fast. 8oz bottle will treat a 6 quart capacity, adjust accordingly.
BrandATP Automotive #ad
ManufacturerATP #ad
Height4 Inches
Length7 Inches
Weight0.11 Pounds
Width4.5 Inches
Part NumberAT-205
WarrantyMoney Back Guarantee

5. Bar's Leaks


Pack of 5, Bar's Leaks 1334-5PK One Seal Stop Leak, 11 oz

Bar's Leaks #ad - Also compatible with diesel and turbocharged engines. Effectively seals all minor engine oil, transmission and power steering system leak. One bottle to treats one engine oil, transmission fluid or power steering leak in a standard passenger car or light truck. It works with all engine oil, transmission fluid and power steering fluids. You will usually see results in about 200 miles or three 3 days of driving. Starts working the minute you install and start driving the vehicle.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Part Number1334-5PK

6. Bar's Leaks


Bar's Leaks Engine Oil Stop Leak Concentrate, 11 oz

Bar's Leaks #ad - Works with all types of motor oil. Restores gaskets; seals to stop and prevent engine oil leaks. Stops and seals motor oil leaks.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height6.5 Inches
Length1.8 Inches
Weight0.75 Pounds
Width3 Inches
Part Number1010

7. Fel-Pro


Crankshaft Front Seal Set

Fel-Pro #ad - Application specific design to ensure a perfect fit. Unsurpassed quality you can trust. Engineered for the sealing repair environment. Validated for fit, form and function. Meets or exceeds all original equipment specifications.
BrandFel-Pro #ad
ManufacturerFel-Pro #ad
Height3.4 Inches
Length3.4 Inches
Weight0.06 Pounds
Width1.2 Inches
Part NumberTCS46051
WarrantyContact retailer/seller for assistance

8. Lucas Oil


Lucas Oil 10278 Engine Oil Stop Leak, 1 Quart

Lucas Oil #ad - Contains no harmful solvents. Renews worn seals with no risk of damage or eventual corrosion. Compatible with petroleum, semi-synthetic and full synthetic motor oils. Reduces engine noise and oil consumption, while raising oil pressure.
BrandLucas Oil #ad
ManufacturerLucas Oil #ad
Height3.3 Inches
Length12 Inches
Weight2.03 Pounds
Width3.3 Inches
Part Number10278
WarrantyManufacturer Warranty

9. Hapco Products Co.


Pro-Seal – 8 oz., Hapco Products

Hapco Products Co. #ad - Positively stops oil / fluid leaks - Guaranteed or your money back! Engines, transmissions, differentials, power steering and hydraulic systems. Easy-to-use treatment quickly restores the flexibility, elasticity and tensile strength of all rubber seals. Does not contain petroleum distillates, which can harm or destroy rubber seals - 100% non-clogging. Can also be added at any time as a seal conditioner to help prevent future leaks - Compatible with all conventional and synthetic oils / fluids.
BrandHapco Products Co. #ad
ManufacturerHapco Products Co. #ad
Part Number208