10 Best Oil Leak Additive of August 2025

• 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

ATP Automotive

• Compatible with petroleum, semi-synthetic and full synthetic motor oils
• Renews worn seals with no risk of damage or eventual corrosion
• Reduces engine noise and oil consumption, while raising oil pressure
• Contains no harmful solvents

Lucas Oil

• Compatible with petroleum, semi-synthetic and full synthetic motor oils
• Renews worn seals with no risk of damage or eventual corrosion
• Reduces engine noise and oil consumption, while raising oil pressure
• Contains no harmful solvents

Lucas 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
• Works in all gasoline and diesel engines including turbocharged, Eco Boost, hybrid and even racing engines, including 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and SUV's
• Can also be used in heavy-duty applications as well as tractors, boats, RV's, motorcycles (including wet clutch), ATV's, lawn equipment
• In most cases the oil leak issue will be repaired with a single dosage. However, for best results and to prevent the problems from reoccurring, use with every other oil change, or once per year
• Use 1/2 bottle for smaller systems (3. 5 - 4. 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

Bar's Leaks

• Increases oil pressure
• Reduces friction
• Helps clean internal parts
• Quiets noise
• Reduces oil consumption

Bar's Leaks

• 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
• DOSAGE: One bottle treats 4 to 6 quarts of oil.

Bar's Leaks

• Permanently seal seeping or dripping oil leaks
• Made in United States
• Package Dimensions : 3.25 L x 6.0 H x 1.0 W (inches)
• Package Weight : 1.0 pounds

BlueDevil Products

• Material-Made of high quality glass,not easily to leaking
• Color-Gradient Color,will be sent at random
• Capacity-5ml,mini and cute,portable to carry
• Usage-Perfect for storing essential oil,essence,perfume mixes,samples and so on.
• Package-20 pcs roller bottles+1 opener+1 pcs 2ml dropper

Wresty

• Seal Conditioner – stops current and prevents future leaks by protecting and reconditioning seals.
• Extreme Pressure (EP) and Anti-Wear (AW) Agents – provide excellent metal-to-metal wear protection reducing noise and gear temperatures. Our sulfur, nitrogen and phosphorus additives meet the requirements of API GL-4 and GL-5 specifications.
• Friction Modifier – supplements the EP/AW additives to help reduce noise and wear. This in turn helps shifting in a manual transmission and also stops chatter in limited-slip posi-traction axles.
• Performance Additive Booster – includes tackifying agents and highly sheer-stable multigrade viscosity modifiers to keep oil on the gears and bearings where it can better lubricate, especially at higher temperatures. Pour Point Depressant (PPD) allows product to flow even at very low temps.
• Manufactured in the USA, this product works in all manual gearboxes, differentials, open & posi axles and more. Stops pinion, axle, output shaft and other seal leaks. Reduces grinding, whining, clunking and protects gears.

Bar's Leaks

• Reduces oil consumption via the piston rings and valve guides
• Prevents blue, smoky exhaust fumes
• Prevents leaks due to leaks at elastomeric seals
• Regenerates engine seals made of plastic and rubber
• Prevents pollution of the environment due to oil dripping from the engine

Liqui Moly