Air Conditioning

AC Stop Leak Plus tm

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Automobiles, Trucks,

R12 and 134A

Stop Leak Molecule

Blue Ribbon

Commercial, Industrial, Residential

R22 and 410A

They'd all love to duplicate our exclusive formula,
fortunately for your sake and ours it's patented and protected!

Our unique additive oils lubricate all moving metal parts in the AC system, while revitalizing O-Ring elasticity. More remarkably though, our added patented Micro Particulate Solids seal hard to find leaks in evaporators, condensers, hoses and other difficult to repair AC components. Don't spend hundred or even thousands to replace expensive parts only to find out you missed a small pin hole elsewhere and now all the new gas has leaked out.

AC Stop Leak Plus can be use as a Tune-Up "Conditioner" during a refrigerant top-off when components are in overall good shape, or as a complete system rejuvenator when gas and oil are added during a major repair or service.

Programs are available for all levels of distribution to professional technicians, from single cases for automotive applications to gallon containers for HVAC commercial use. We even offer the specialized tools needed for installation, simply scroll down the page to learn more about them.

For those of you wondering,
GWR Stop Leak Plus is not activated by air, moisture or refrigerant gas like the common products found at the Auto Parts store or HVAC supply houses!

It is not polymer based and will not harden.
It simply remains as a base oil in the system after installation and never "converts" like the problem type sealants


If a sealer comes in a
pressurized metal can, don't use it!

They all set by moisture or refrigerant contact and that means they will clog a system and or recycling machine once they touch air inside the unit. Watch out for the words "Inert", "Activated", "Forms a Chemical Weld" these are the dead give away it is a polymer!

But what about the little plastic bottles I'm beginning to see on the internet, aren't they the same as yours?

Second Warning:

These are the Johnny come lately copies of our Patented AC Stop Leak Plus!
Ones that look like liquid (red, yellow, etc) are mineral oil based and have zero solids (seal swellers type), or they contain powdered calcium or silicate solids that stick together and form large blobs of floating debris in a system. As you may be able to visualize, neither idea is good! They will either weaken rubber parts, have no effect at all, or the larger particles will clog the filters, orifices, capillary tubes and other parts of the AC System.

GWR's SLP is not like all the others that claim to seal A/C leaks...

We do not react to moisture and therefore do not need to come in a sealed, pressurized can like the others. It's interesting that those formulas are so volatile they sometimes even harden in the delivery tube attached to the can, while you're trying to install them. On the other hand, GWR's SLP will not clog installation equipment or the recycling machines needed to remove gasses from systems being serviced. Take a look at this picture and you will see why the products in pressurized cans are not only a problem for a recycling machine but also the system itself.

Don't let this happen to you recycling machine or worse, the vehicle itself.

This end view picture of a solenoid valve from an evacuation machine, really demonstrates the problem!
Notice the hardened particles of a typical polymer stop leak product. These granular particulate float around in the system until they attach to a part or get trapped in a filter or expansion valve. When that happens, system efficiency is reduced or even stopped. Worse, another repair is required to remove the bad sealer and the parts that have been damaged. Don't fall for the millions spent on marketing the polymer based products! They are sold by monster companies only interested in their bottom line... not yours.

Easily visible, hardened inferior stop leak product.

How GWR's SLP is different and why it works...

Three elements are necessary for GWR's Stop Leak Plus to work.... the Refrigerant, the system pressure and high velocity flow / movement. These actions are the "carrier" that deliver our unique proprietary Micro Particulate Solids to the point of a leak or leaks. When corrosion occurs small pin holes begins to open up in all systems, its just a matter of time. Whether pre-existing or even in the future, refrigerant and some oil escapes through those hole at a rapid rate of speed. This flow creates a spiraling venturi action that pulls in some of the Stop Leak Plus particulates that are circulating through the system. When our escaping molecules bombard the ragged edges of the hole they begin to attach to the area and each other, eventually forming a seal or patch. Of great importance, in contrast to competitors, our Stop Leak Plus particles were formulated to stay flexible and pliable after a seal is created. They will remain secure through years of on and off temperature cycles and vibrations in an HVAC system or automotive vehicle.

Simply stated... This is the finest
Air Conditioning Stop Leak product on the market!
It's sold worldwide!

Gallon of HVAC Stop Leak Plus
Note: One gallon of SLP can treat
60 to over 100 residential units
(Note: Not for DIY single system repairs)

Stop Leak Plus both bottles

Note: A single bottle of either 134a or R12
SLP will treat one average size vehicle
(Note: Minimum sale is carton of 6 bottles)

It will seal irritating, pesky, hidden leaks
and eliminate costly service comebacks.

Still concerned about using Stop Leak Plus?

We believe this expert testimony definitively answers the question everyone with a leak eventually asks.

When ask "Will a Stop Leak Sealer cause damage to A/C Systems?"

Prof. Tom Brown, Centennial College, Climate Control Dept., Toronto, Ont., Canada, owner of Dealerman Wholesalers (Remanufacturer of AC Compressors), founder of AC Canada and technical air conditioning advisor to Spectra Premium Industries (OE Mfg of Climate Control Products) replied....

"Since the introduction of AC sealers several years ago, we noticed a drop in evaporator sales but an increase in compressor sales, especially for older vehicles.

I attribute that to the fact that a sealer makes an
AC job affordable when there is a leaky evaporator and compressor. Since the sealers do a good job on evaporator leaks, but won't seal compressor shaft seals, we are finding customers generally authorize a replacement compressor and the stop leak sealant.

In my examination of over 2,000 returned compressors over the years, I have not noticed a significant problem with sealants. In fact, less than ten units showed congealed sealant at all. Upon closer examination, in only a few cases could the congealed sealant be determined to be the cause of the failure. And this was no doubt due to the technician failing to replace the dryer and leaving moisture in the system during servicing.

Additionally, in just the last 3 month summer sales season, we sold over 460 compressors and did not receive even a single return due to sealers."

Thank you Prof. Brown, I don't think it could be stated any clearer....

Stop Leak products should not be blamed for failures in systems after they are installed because most problems can be traced to technicians or DIY'ers improperly preparing systems before their installation. Additionally it is critical which Stop Leak a professional uses! Just be sure you are using AC StopLeak Plus, the only non polymer base Micro-Particulate Formula on the market.


Because of time and personnel limitations, we are not able to suggest local shops in your area that install stop leak products. If you need your system to be sealed, we suggest you call local service companies and ask if they have a service available that uses GWR's A/C Stop Leak Plus. You can even direct them to our website if they are unfamiliar with our product...

Please note that SLP is a professional product and is not intended for DIY consumer installation, special service tools and a thorough working knowledge of A/C repair are required. As such, we "do not" have single application bottles available for Consumers / DIY customers. Before calling us, we suggest you contact a local A/C repair shop for a professional install when you do not have the proper training or the necessary tools.
(For more information, please see FAQ's below).


Due to DOT / UPS / FEDEX / USPS shipping restrictions on chemicals in general we do not sell single application bottles of our Super Stop Leak Plus, so the following minimums apply to a shipment.

Minimum Automotive Order - 1 Case of 6 Bottles (R12 or 134)
Minimum Residential / Commercial Order
- 1 Gallon (R22 or 410)

If we have not answered your questions so far, scroll down the page to our FAQ section. Additionally, please feel free to call and speak to a tech support person.

Tech Support and Order Line... 1 (800) 266-4497 (2pm to 8pm EST)


SUPER STOP LEAK PLUS tm prevents comebacks, period!
That means more profit for installers and no headaches for consumers.

GWR’s new SUPER STOP LEAK "Plus" is specifically formulated to prevent leaks and repair existing leaks... while revitalizing gaskets and o-rings with patented lubricates. Because of its liquid consistency, you install it just like standard A/C oil. A technician simply uses an A/C oil injector tool to install through the low side service port but you can also draw it through the center tap on a set of manifold gauges, if you prefer. This means the system does not need to be evacuated to use our product, another time saver! Simply start the engine or system, turn the A/C to maximum cooling, install SUPER STOP LEAK "Plus" and recharge the system with R-134A, R-12, R22 or R410A as per the service manual. Make it part of your maintenance service... add SUPER STOP LEAK "Plus" to every A/C service and keep systems at optimum performance levels.

Basic Installation Configuration

Basic Installation Configuration

A basic 2oz oil injector is placed inline with the low side hose, (after the gages),
so the new refrigerant gas flows through it and carries the Stop Leak Plus into the system.

Additional Service Products for Professional Installers

AC Test

Trace® Internal Refrigerant
Leak Detector
(For those tech's still not using the revolutionary... A/C Stop Leak Plus)

Works under all conditions! Not affected by noise! Not affected by wind! Visible in bright light! Visible under ultraviolet light!

We have other items for your service department too...

Super Flush, Acid Test Kit, Acid Neutralizer, Coil Cleaner, Drain Pan Tables and more!


Due to blatant attempts to copy our unique, patented product and literature, GWR, owner of the AC Stop Leak Plus brand, hereby posts Legal Notice... ACStop Leak Plus is an exclusive Trademark of GWR Specialty Automotive Products
Any unauthorized use of the name or copyrighted materials from this site will be subject to
federal prosecution and adjudicated compensation for damages of punitive and or compensatory nature!


Stop leaks such as SupeCool's Total Leak Stop, Bar's A/C StopLeak & Sealer, UView's AC Stop Leak Plus, FJC's Air Conditioning Stop Leak and other less famous brand name products, are unauthorized copies of the patented formula sold by GWR under the name AC Stop Leak Plus. Likewise, because these products do not match the technical specifications of GWR's unique, proprietary AC Stop Leak Plus formula, they do not have our endorsement or approval.

Total Leak Stop, A/C Stop Leak & Sealer, Air Conditioning Stop Leak and AC Stop Leak Plus are trade marks of their respective owners.

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