10 Best Transmission Leak Sealer Of 2022 – Review And Buying Guide

Finding the best transmission leak sealer that will meet all your needs can be a bit of a challenge, even for the most seasoned expert. While many companies still create good transmission leak sealers, the market has turned its attention toward advanced models that carry higher price points.

In our quest to find the most suitable models, we focused on features like comfort, adjustability, and durability. We recommend you take a close look at each product we listed here and see the features you need for your personal use.

Keep reading to learn more…

Top 10 transmission leak sealer : Editor’s Pick

10 Best transmission leak sealer Reviews:

1. BlueDevil Transmission Sealer

Features :

  • Guaranteed Permanent Seal
  • Restores Dried, Cracked, and Shrunken Rubber Seals
  • Works in Manual or Automatic Transmissions

Additional Info :

Color Blue
Item Dimensions
Height 2.75
Width 2.75
Length 7.25
Weight 0.9
Release Date 2014-09-12T00:00:01Z

2. Bar’s Leaks High Mileage Transmission Repair, 16.9 Fl Oz

Features :

  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise
  • Stops leaks
  • Conditions seals and o-rings

Additional Info :

Item Dimensions
Height 1.8
Width 3.6
Length 8.4
Weight 1.08
Release Date 2011-12-02T00:00:01Z

3. Bar’s Leaks 1416 Super Transmission Fix – 16.9 oz.

Features :

  • Stop Slipping, Rough Shifting, & Seals Fluid Leaks
  • Works in all Automatic, Manual, CVT, & Dual Clutch Transmissions
  • Reduces Noise
  • Renews Worn Bands
  • Bar’s Leaks Super Transmission Fix is a synthetic blend treatment for transmission fluid, seals, metal surfaces, bands and clutch plates.

Additional Info :

Item Dimensions
Height 8.8
Width 2
Length 3.5
Weight 0.6

4. Niteo Motor Medic M1512 TranSeal Automatic Transmission Sealer – 12 oz.

Features :

  • MOTOR MEDIC is a local family owned company based out of Charlotte, NC. For more than 75 years, LIQUID WRENCH products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation.MOTOR MEDIC
  • Stops leaks fast
  • Compatible with most ATF
  • Conditions seals
  • Shift improver
  • This item is not for sale in Catalina Island

Additional Info :

Item Dimensions
Height 8
Width 3
Length 2
Weight 0.78043640748
Release Date 1997-11-08T00:00:01Z

5. NO LEAK 20601 Transmission Stop Leak, 16 Fl oz. , Red

Features :

  • Stops AND prevents transmission leaks caused by dried, shrunken, or harden seals
  • Stops hard shifting and repairs seals
  • Safe & compatible with ALL transmission fluids

Additional Info :

Color Red
Item Dimensions
Height 8.2499999915761
Width 3.9999999959157
Length 1.7499999982131
Weight 1

6. Rislone High Mileage Transmission Stop Slip with Leak Repair,Pack of 1,4502

Features :

  • Restores performance
  • Quiets noise
  • Stops leaks
  • Stops slipping and prevents lazy shifting
  • Conditions seals and prevents future leaks

Additional Info :

Item Dimensions
Height 2.5
Width 4.3
Length 10
Weight 1.95

7. Berryman Products 0712 Transmission and Power Steering Sealer with Easy Pour-in Long-Neck Bottle, 11 Ounce, (Single Unit)

Features :

  • Stops leaks in automatic transmissions and power steering units
  • Gently revitalizes hardened seals and O-rings
  • Made with premium plasticizers, lubricants, and additives
  • Compatible with all varieties of power steering and automatic transmission fluids
  • Improves rough shifting

Additional Info :

Item Dimensions
Height 9
Width 2.31
Length 2.31
Weight 0.6875
Release Date 2017-06-05T00:00:01Z

8. Bar’s Leaks 1414 CVT Transmission Fix – 11 oz.

Features :

  • Bar’s Leaks CVT Transmission Fix is a synthetic blend treatment for the transmission fluid, seals and metal surfaces, 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
  • 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.
  • Extreme Pressure/Anti Wear Agents
  • Seal Conditioner and Cleaning Detergents
  • Performance additive booster

Additional Info :

Item Dimensions
Height 8.12
Width 1.8
Length 3
Weight 0.75

9. SealLube – Stops Leaks: Gasoline Engines, Diesel Engines, Automatic Transmissions, Manual Transmissions, Power Steering, Rack and Pinion, Differentials and Hydraulic Systems – 8 oz.

Features :


Additional Info :

10. Bar’s Leaks Standard Works on All Engine Oil, Transmission, Power Steering, Hydraulic & Differential & Gear, Gray, 1 Pack

Features :

  • Works on ALL Engine Oil, Transmission, Power Steering, Hydraulic & Differential & Gear
  • Seals & Stops all Leaks
  • Will Not Clog Filter or Harm System
  • Use for Preventative Maintenance
  • Bar’s Leaks Super Leak Fix is formulated to work in multiple systems including Engine Oil, Transmission, Power Steering, Hydraulic and Differential & Gear.

Additional Info :

Color Gray
Item Dimensions
Height 8.8
Width 2
Length 3.5
Weight 0.75

Buying Guide: What to Consider When Select transmission leak sealer


How much should you expect to spend on a product like this? Is it a one-off cost, or is there some kind of recurring element?

When it comes to transmission leak sealer, a great value can come in many different forms. It could be a lower price, impeccable construction, and design, or higher durability. We’ll cover all of these different factors below, where we’re sharing our top picks for the best transmission leak sealer for the money. We’ll go over everything consumers should know to get a great value out of their transmission leak sealer!


The phrase “people get what they pay for” is especially true when it comes to transmission leak sealer. The range in durability from person to person can be pretty substantial depending on the materials used in the construction. If someone saves $100 on a transmission leak sealer, but it wears out in 1 month, are they really getting a good value?

Compare that to a transmission leak sealer that costs $50 more but wears out after 1 or 2 years. Most people would argue that the second option is the better deal over the long term. Before purchasing, you should consider how long you want to have the transmission leak sealer and then read reviews to make sure you know how long you can expect it to last.

Consider Where You Purchase 


A vast majority of people now buy their transmission leak sealer online rather than going to a brick-and-mortar physical location. That’s largely because online shopping offers greater convenience, and many brick-and-mortar stores can be confusing when it comes to their models, pricing, and types.

While people can’t try out an online transmission leak sealer the way they can in a store, brands often come with generous trials. These allow people to try out the transmission leak sealer for a while and return it if they’re unhappy.

In addition, many online transmission leak sealer are more affordable than their in-store counterparts, because they have less overhead and have cut out the middlemen to pass savings directly to the consumer. If you purchase online, make sure to check to see if they will have to pay extra for shipping or not. A lot of the new companies offer free shipping, but not all.

Types of transmission leak sealer

Before even thinking about all the different transmission leak sealer available,  You should choose the product types that will be ideal for your task.


Choosing a product based on a design that people will love can be tough. Just because you might like the look and style of it, doesn’t mean it’s the best. Below are some steps you can follow that I’ve used in the past when making decisions on which product designs to choose. Today, a lot of e-commerce sites have the same products. Naturally, it means people use product photos and videos to find the best item. Some of the tips in this article will help you choose or design a successful product.

  • Dimensions. How big are these products?
  • Materials. What are they made from? Is there an advantage to choosing one material over another?
  • Generic characteristics. What sort of features do products in this category include?
  • Product-specific functionality. Do certain products have key characteristics that others don’t? 
  • “Vs.” comparisons. Wireless or wired? Portable or desktop? Metal or wood? These are the key A/B-style decisions typically made early in the buying process.

The Verdict

Finally, we hope that our reviews about these transmission leak sealers will help you to choose your ideal product available on the maker. The question remains, how many of these transmission leak sealer will you use and how often? Some manufacturers come out with newer transmission leak sealer every few months. This is because they know that people want the better transmission leak sealer. It’s all a matter of choice and your budget. The good news is that the features of good transmission leak sealer tend to trickle down in price. If you start off with a cheaper version, chances are you can afford the more advanced versions of it a few months later.