20 Best Transmission Leak Sealer (2022 Updated)

Restores performance and adds protection. This formula reduces rough shifting and friction, while eliminating slip, controlling temperature, and repairing shudder, chatter and whining. And how exactly does it do this It reduces friction enough to prevent wear.

It also helps control the temperature, while at the same time allowing some friction to prevent the internal clutch material from slipping. Hundreds of thousands of bottles sold nationally.

Automatic Transmissions do not work without fluid, nor do they work well without the correct fluid. Automatic Transmission Fluid (ATF) is one of the most complex of all lubricating fluids. It has to reduce friction enough to prevent wear and control temperature while at the same time allowing some friction to prevent the internal clutch material from slipping.

This same fluid must operate at low and high temperature extremes. Rislone High Mileage Transmission Stop Slip with Leak Repair contains a special blend of viscosity improvers, anti-wear friction modifiers and extreme pressure performance additives to solve most transmission problems.

These additives reduce rough shifting and friction, while eliminating slip, controlling temperature, and repairing shudder, chatter and whining. Excellent to use as a preventative maintenance product.

Use to top off existing fluid when low or add a bottle when changing fluid. Specifically designed for higher mileage vehicles over 75,000 miles.

Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation, and rough shifting in worn transmissions. It completely eliminates most seal leaks. Use in any transmission for preventative maintenance.

Use also in light duty manual transmissions to increase shifting ease and transmission life.

Permatex Automatic Transmission rtv Gasket Maker is specially formulated to ensure complete sealing when in contact with conventional and synthetic automatic transmission fluids. This specialty silicone can be used as a gasket maker or as a cut gasket sealant.

CVT (Continuously Variable Transmission) design is fundamentally different from a traditional automatic transmission. Conventional ATF (Automatic Transmission Fluid) and additives cannot be used in these specialized transmissions.

Your vehicle is a good candidate for this solution if you are noticing excessive noise, shudder, slipping, leaks, or low overall performance in your CVT. Bar’s Leaks CVT Transmission Fix is a synthetic blend treatment for the transmission fluid, seals and metal surfaces.

Additives stop belt/chain slipping, seal fluid leaks and reduce noise. Global multi-vehicle domestic/import formulation can be used in all push belt-drive and chain-driven CVT applications, including both high- and low-viscosity applications.

Some vehicles do not have a normal dipstick. For these, the product has to be added to the transmission through a fill plug. Consult owner’s manual for location. After you add the recommended dosage of Bar’s Leaks CVT Transmission Fix, you will start to notice results immediately or within 200 miles or 4 days of driving.

Permanently restores gaskets and seals transmission leaks fast. Non-clogging and compatible with all transmission fluids. Guaranteed permanent seal / restores dried, cracked, and shrunken rubber seals / works in manual or automatic transmissions.

Effectively repairs leaks in automatic transmissions. Prevents leaks caused by aged seals & gaskets. Powerful cleaning agents remove sludge, gums, & varnish to prevent premature failure and extends transmission life.

Ideal preventative maintenance tool when added to transmission fluid each time fluid and filter are changed Not compatible with CVT transmission fluids. Size : 32 Ounce America’s leading brand quickly stops leaks, restores shifting and prevents future leaks in automatic transmissions.

Formulated with advanced seal additive technology, MaxLife Transmission Stop Leak helps eliminate leaks in transmissions with over 75,000 miles. MaxLife Transmission Stop Leak features special seal conditioners that help restore old seals and protect them from hardening.

Compatible with automatic transmissions in General Motors, Ford, and light duty trucks. It can also be used in many imports such as Honda, Hyundai/Kia, Nissan, Subaru, and Toyota.

Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.

Use also in light duty manual transmissions to increase shifting ease and transmission life. Model # 10009 Features: Great for eliminating most seal leaks Works in all transmissions,Vehicles & Parts > Vehicle Parts & Accessories,LUCAS.

Bars Leaks Trans Fix is a synthetic-blend treatment for the transmission fluid, seals, metal surfaces, bands and clutch plates. Global domestic / import formulation can be used in all automatic, manual, CVT & DCT transmissions.

Item: 1415.

Effectively repairs leaks in automatic transmissions, power steering and hydraulic systems. Prevents leaks caused by aged seals and gaskets. Powerful cleaning agents remove sludge, gums, and varnish to prevent premature failure and extends transmission life.

Not compatible with CVT transmissions fluids.

Short Description:Specially Designed To Withstand The Harsh Detergents And Additives Found In Automatic Transmission uid – Formulated To Resist Aging, Weathering And Thermal Cycling Without Hardening, Shrinking Or Cracking – Improves Transmission Oil Resistance And Provides Good Adhesion While Retaining Flexibility – Sensor-Safe, Non-Corrosive, Non-Flammable, Non-Toxic, And Low Odor Sealant Can Be Used As A Gasket Maker Or Dressing – Suggested Applications: Automatic Transmission Pans, Case Halves And Inside Covers.

This 24 oz bottle of Lucas Oil Transmission Fix (LUCA10009) can help keep your vehicle running smoothly and efficiently. Its a thermal and stable blend of petroleum-extracted additives that are designed to correct existing problems and prevent new ones in automatic transmissions.

This seafoam transmission fix works to clean and lubricate sticking valves for proper shifting. It also works to completely eliminate most seal leaks and lowers operating temperatures in hard-working units.

Lucas Transmission Fix stops hesitation and rough shifting in worn transmissions. Its suitable for use in a variety of vehicle makes and models, including motor homes and other hard-working vehicles, such as tow trucks and trucks.

The 24 oz Lucas Oil Transmission Fix extends some much-needed protection to planetary gears.

Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.

Use also in light duty manual transmissions to increase shifting ease and transmission life.

ATP AT-205 Re-Seal Stops Leaks, 240ml Bottle. Manufacture: ATP. Re-Seal is a special plasticizer which softens and expands hydraulic seals to stop leaks. It will work on any hydraulic system (except brake) including jacks, lifts, ploughs, and industrial equipment.

Bar’s Leaks Super Leak Fix is formulated to work in multiple systems including all engine oil, transmission, power steering, hydraulic and differential & gear. Used to stop current leaks, or as a preventative maintenance before leaks start.

Premium seal renewing additives are designed to stop seal and gasket leaks caused by normal wear and age. Product Features: Contains no solids, will not clog filter or harm system. Fill hose included for easier application in some vehicles.

Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.

Use also in light duty manual transmissions to increase shifting ease and transmission life. Contains no solvents. Lowers operating temperatures and stops foaming. Can be added to existing fluid without draining any out.

Effective in an extremely high percentage of cases.

Protect your vehicle and keep it running smoothly and properly with this ATP AT-205 Re-Seal Stops Leaks 8 Ounce Bottle. Its professional strength formulation stop leaks fast and helps strengthens your vehicle’s rubber seals and gaskets.

This ATP reseal can be used with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil. It is free of petroleum distillates and it will not cause the seals in your vehicle’s parts and components to over-swell or breakdown.

Use it to treat leaks in your engine, transmission, power steering system, hydraulic systems and differentials. It does not cause any damage to any of your vehicle’s components or internal bearings.

AT-205 Re-Seal is a fast, effective and safe stop-leak for all rubber seals and gaskets. The exclusive formulation restores worn or dried out seals and is not harmful to internal bearings and components.

Wynn’s Automatic Transmission Treatment is an oil soluble supplement developed to stop and prevent leaks and ease shifting. Stops and prevents leaks. Rejuvenates rubber seals and O-rings. Cleans and protects the system by means of detergents and dispersants.

Eases shifting. Prevents ageing and oxidation of automatic transmission fluids. Prolongs component life. Can be added to all conventional ATF fluids meeting Dexron II, III or VI, Ford, LHM or equivalent specifications.

Also for power steering systems containing ATF fluid.