Super Leak Fix (1305)

Super Leak Fix


  7 Reviews

Sometimes there is a one-stop shop. Sometimes there is an easy button. Sometimes a product is so well-formulated that it can handle multiple types of leaks, from various automotive systems. Bar’s Leaks Super Leak Fix is exactly that kind of product. Bar’s Leaks Super Leak fix is an incredibly advanced multi-system formula designed to work quickly and stop leaks in all:

  • Engines
  • Transmissions
  • Power steering systems
  • Hydraulics
  • Gears and axles

Bar’s Leaks has been sealing leaks in consumer, OEM, commercial/industrial and even military applications since 1947. Our technology and research changes as the automotive industry evolves. We have become synonymous in the automotive world with fixing leaks, from consumer to professional situations, for any budget, any level of installation expertise. If you have a leak, we have a product that can fix it. Nothing embodies that concept more than Bar’s Leaks Super Leak Fix, which is truly one of our most technologically-advanced multi-system formulas ever.


Fill hose included for easier application in some vehicles. Shake well. Add Super Leak Fix to leaking system per dosage chart on package. Do not overfill. Leaks usually stop in 200 miles, or 2 days of usage. If leak continues, second application may be required or mechanical attention is needed. WARNING: Do not use in brake system or add to antifreeze/coolant.

Available at:


Bar’s Leaks Super Leak Fix is formulated to work in within various components including all engine oil, transmission, power steering, hydraulic and differential/gear systems. Use to stop current leaks, or as preventive maintenance to prevent any possible future leaks. Special Bar’s Leaks premium seal-renewing additives are designed to stop seal and gasket leaks caused by normal wear and age. Contains no solids whatsoever and will not clog filter or harm system.

More benefits of Bar’s Leaks Super Leak Fix:

  • Developed by America’s most trusted name in leak repair technology
  • Safe, proven and easy to use – will not harm seals or any other system component
  • Special spout and hose included for easier installation

Bar’s Leaks Super Leak Fix helps with small leaks (for example, if you need to add fluid 1x per month), medium leaks (If you need to add fluid 1x per week), and preventive maintenance (to prevent future leaks from developing). The formula is very effective with leaks involving engine oil (gasoline, hybrid, diesel), transmission fluid (automatic, manual, CVT), power steering fluid (pump, gear box, rack & pinion), hydraulic (jack, snow plow, tractor, construction), and gears (differential, axle, gearbox, transfer case).

All of our renowned maintenance and repair solutions are the result of over 70 years of automotive chemical research. Since our inception, we’ve been known for maintaining the performance of (and stopping leaks in) consumer, commercial, OEM and even military applications. When you choose Bar’s Leaks, you can depend on proven performance at a reasonable price, backed by a family-owned company that knows aftermarket automotive leak solutions better than anyone else in the world.


Engineered and 100% made in the U.S.A., just an hour northwest of Detroit, Bar’s Leaks formulas are manufactured by a family-owned team whose mission it is to make leaks and preventable automotive problems a thing of the past. With hundreds of millions of bottles sold in our company’s history, you’re in the right place.

Discover where to get Bar’s Leaks Super Leak Fix at a retailer near you.

Customer Reviews

  7 Reviews
Submit your review

Create your own review

Average rating:  
 7 reviews
 by Rick B.
Used it, not one single drop of leaking anymore

Hi, still another positive testimonial on your GREAT products. Back several months ago I wrote and told you about my amazing results with your Heavy Duty Rear Main Seal (part 1040) that I used in my 2008 Ford Ranger 4.0 SOHC engine. NOW I'm writing again to tell you that I am even more amazed with your 1305 Super Leak fix product. I used it in my 1997 Thunderbird's AUTOMATIC transmission not expecting it to stop the leak that was MUCH worse than the rear main in my Ranger. I really have no idea where it was coming from (certain it wasn't the pan or lines) but it was coming out pretty good. (NOT a high pressure leak but IMHO a BAD leak nonetheless). I put it in and let the engine idle for a few hours varying the RPMs from idle to around 2,000 and after several times doing this I slipped a clean piece of cardboard under the car as I had done with my Ranger and NOT ONE DROP of fluid on it!! FANTASTIC!! (The car isn't registered or insured is why I didn't drive it) Thanks again for a GREAT product!!

 by Harry S.
Money saver

I used Super Leak Fix (1305) to help with an aggravating transmission leak. The output shaft seal was leaking enough to be annoying and leave a couple drops on the floor. I do not have a lift and was not paying a shop a grand to replace the $25 seal, so I put in a bottle of this, and the leak stopped.  Money saver.

 by Bob
Great Product!

As promised Bar’s Leaks Super Leak Fix started working shortly after it was installed, and we saw results in about 2-3 days of driving.

 by Sharon Ashmore
Super Leak Fix - Works Great

My husband keeps this product stock in our garage. He has used it for several different type leaks. He is my family's go to for auto repair and Super Leak Fix is his go to for leaks. Thank you.

 by Hillery
Bar's Leaks Super Leak Fix

I have always relied on Bar's Leaks products & the Super Leak Fix does not disappoint.

 by Patrick
oil leak

Two bottles slowed leak. May try third.

 by Bernard Cooperson
Bars Leak SUPER Leak fix works

Had drips on driveway from 2000 Chevy Blazer SUV, 144,000 miles. Wasn't sure leaking from where. Put Super Leak Fix in both engine oil and transmission. Drove around a while. Amazing that the problem is solved! Avoided a major mechanic bill. Thank you, Bar's Leaks.

FAQ (click or touch to expand)

Product Videos

SDS/Technical Info

Product Data SheetOpen