At-205 Re-Seal Review – Is It Worth Your Money?

Isn’t it very annoying to have to pull over because of something as small as a leak?

This small situation cannot only derail your trip but also lead you to incur lots of expenses in repairs at the mechanic’s shop.

Unfortunately, there are plenty of points in the vehicle that need to stay sealed for the vehicle to work properly. You could have a leak in the engine, the power steering system, the hydraulic system, and basically anywhere else.  

But when the leak involves a rubber seal or a gasket, and it turns out that the leak is not huge, you don’t have to waste all that cash paying a mechanic to fix it. You could apply a stop leak or a resealing product, and it might end up being very effective.

Today, we’re going to examine one popular resealer we came across, and we’re positive it might be the solution to your leak issues.

1. Easy to use

The ATP AT-205 Re-Seal is designed for fixing minor leaks without using professional help from a mechanic, making the repair not only fast but also inexpensive.

A most striking aspect about the ATP AT-205 Re-Seal is the ease of use it presents.

Assuming the leaks are in the hydraulic system, you just pour the sealant into the hydraulic oil. The product is designed to move around looking for leaks on rubber and plastic seals, and when it encounters them, it will occupy the spaces or the leaks, thus shutting them. If the leaks are in the transmission system or the engine perhaps, you do the same; no hassle.

2. Works for all rubber leaks

If your car is old, there’s a high chance that the gaskets and rubber seals, particularly in the cooling system, are wearing out. The product is meant for rejuvenating these seals as well as gaskets in the transmission, the hydraulic systems, the power steering, and the engine. It makes them expand up to a point whereby the seal works again.  

3. Compatible with vehicle fluids

Some people might be worried that the product will change the chemical properties of the engine oil or other vehicle fluids but we want you to know there’s nothing to worry about. This stop leak is compatible with power steering oils, gear oils, and other conventional and synthetic oils in the vehicle, you don’t have to worry about it ruining these oils or being ruined by them.

4. No petroleum distillates

Petroleum distillates are known to over-swell and break down rubber seals, and they’re one of the reasons why some resealing products get negative feedback. Luckily, the ATP AT-205 Re-Seal doesn’t contain petroleum distillates.

Highlighted Features:

  • Easy to use
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    Effective for sealing rubber and gasket leaks
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    Doesn’t contain petroleum distillates
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    Fast-acting, sealing leaks in 5 hours
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    Compatible with synthetic oils
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    Comes in an 8-oz bottle for treating a 6-quart capacity

How to use the At-205 Re-Seal

The way you’re going to use this stop leak product depends on where the leaks are. Assuming you’re dealing with an oil leak, the best thing is to use the product during an oil change, and here are the steps to follow:

  • Turn off the vehicle and remove the oil cap.
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    Switch the heater control to hot.
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    Pour the product into the oil you’re looking to pour in there.
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    Pour the oil into the opening.
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    Replace the oil cap.
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    Drive the car to ensure the leaks get sealed.

This is are the general steps you should follow. If the leaks are in the cooling system, then you should add the product to the coolant before pouring it in there.


Some folks will add the product just fine but they will forget the last step – driving the vehicle. The At-05 Re-Seal targets rubber but bear in mind that paint and rubber are pretty much similar.

Therefore, you might find that if you don’t drive the vehicle to send the product to the rubber leaks, it might dissolve the paint it comes across, and end up clogging various components in the engine. You don’t want to deal with such a situation, right? So, be sure to drive the vehicle a bit after applying the product.

One more thing: stop leaks are designed for small leaks. If your gaskets are torn, a stop leak product is unlikely to work; you’d better replace the gaskets.

Final Word

This product is meant for repairing old or worn rubber seals and other small leaks. It is a cheap option for stopping leaks, and moreover, it doesn’t need any special skills. The ATP AT-205 Re-Seal works quickly, totally sealing the leak in about 5 hours. With the ATP AT-205 Re-Seal, you are able to save both time and money by avoiding an unnecessary visit to the mechanic’s shop.

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Click Here to Leave a Comment Below 6 comments
Alex - February 18, 2019

Hi. Thanks for the information. I ordered for 2 bottles on Amazon. One for the engine oil and the other for the power steering fluid. Should I add a whole bottle into the power steering pump,or half of it? Thanks.

    Sam - September 13, 2019

    Would use no more than 1/4th a bottle. States on bottle is good for up to 6 quarts and your power steering system holds around 1-2 quarts.

John W Remlinger - April 7, 2019

Why doesn’t AT-205 provide directions for using such as, were do you pour the fluid for the following parts, gas leak, engine oil leak, transmission leak, cooling system leak, power steering leak, and hydraulic system leak?

Every manufaturer of “Stop Leak type products” provides instructions, why doesn’t ATP Automotive?

I purchased AT-205 Re-Seal for a leak in my cooling system, but no ware does the label, or packaging include this information, also no instructions on your website.

I hope I receive answers so I can use AT-205 Re-Seal, or return your product along with a bad review.

    Michael - May 13, 2019

    The video specifically states that AT-205 can be used in engine, trans, differential and power steering and cannot be used in brakes. It does not mention using the product to stop gas leaks or cooling system leaks.
    I added a bottle of AT-205 to the engine oil of my Infiniti i35 to stop a slow but steady rear main seal leak and amazingly it worked! This was after trying two other rear main sealer products found at auto parts stores that did not work

Paul - July 8, 2019

I had an oil leak in my 2008 Ford Explorer. 386,000 miles
. I put entire bottle in. I have put about a 1,000 miles on engine and it hasn’t used any oil. Not sure it will continue to work, but so far so good. I bought this vehicle new and have kept the maintenance up on it.

Scott - August 12, 2019

After I add this to oils I need to drive continuously for 5 straight hours or a little every day?


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