Air Conditioning

AC Stop Leak Plus tm

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Frequently Ask Questions and the Answers:


Can a consumer install GWR's Stop Leak Plus?

This professional product is not something you can buy at a local auto parts store, or take home for a simple installation. On the other hand, a mechanically inclined person could use the Super Stop Leak Plus if they are familiar with A/C repair and have the required tools necessary to test and install the product correctly. At the very minimum, you will need the oil injector tool used by shops for the last 30 years, to put refrigerant oil into A/C systems. Additionally, you should have a set of manifold gauges and a pump to pull the vacuum for testing leak down time.

Oil injector tool for installation of GWR Stop Leak Plus

Please note that if you don't have or can't borrow a professional installation tool like this one, it's impossible to install GWR's Stop Leak Plus. Our product is not a "Do It Yourself" sealer with throw away, quick connect hoses like those the Auto Parts store sells, you must have someone with professional knowledge do the service.

This extremely high quality, professional tool is available from GWR, in the $50 range.
Please specify R12 or 134A models or both Note: Actual shipped tool may vary slightly from picture.

How does it work?

GWR's Stop Leak Plus is an inert mixture of specific Super Oils and our proprietary Micro Particulate Solids. Once installed in a closed circuit, it disperses and diffuses throughout the A/C system where it remains in a suspension until needed. Based on several conditions present in the system (i.e. flow, pressure, venturi action around pin holes, etc), it seeks out leaks and migrates through the small holes as exiting refrigerant and oil create a hi velocity venturi like Black Hole. During the migration through the hole, our particulate begins to build and build to form a chemical weld that seals the leak. This "patch" never hardens, but remains pliable so it can flex with expansion and contraction of a system.

How large a leak will it repair?

In general, Super Stop Leak Plus is designed to seal an A/C system that has slow leaks, taking weeks or months to show up. The system must be able to hold a vacuum on the low side for 45 minutes, at a minimum. If the vacuum leaks out or changes, within an hour, the hole is too large to be sealed and manual repairs need to be made.

Will it seal evaporator leaks?

Yes, plus it will also seal leaks in the condenser. Additionally, the special oils will rejuvenate all connection hoses, gaskets and o-rings. The only part of a system where a leak can not be repaired is a compressor shaft seal. All seals are designed in a way that leaks are inevitable because shafts that go through them, continually turns at the seal's mating lip.

How much do I use?

One 2 oz. bottle is all that is necessary to seal and condition one average size vehicle’s A/C system. When adding Super Stop Leak Plus to an evacuated empty system, substitute one bottle of Super Stop Leak Plus for 2 oz. of the regular A/C oil. (i.e. A 10 oz regular fill is now 8 oz's oil and one bottle of Super Stop Leak Plus. If the vehicle has a slow leak but still has a partial charge at service time, simply add one bottle of Super Stop Leak Plus along with the required amount of refrigerant until the system meets factory specs for a new charge. (Per service manual specifications)

Is it available for both R-134A and R-12 systems?

Yes! There is a Super Stop Leak Plus for both R-12 and 134A A/C systems, plus it works with blended refrigerants as well. Be sure to specify either the R-12 or 134A version when dealing with automotive applications, to match system being serviced.

What about commercial or home A/C systems?

We do have additional formulas for home, commercial and industrial refrigeration systems. These unique products are revolutionary and just as easy to use as our versions. Product specific versions for R22 and R410A are available in bulk gallons, for installation by professional service companies. (Please note we do not have single application bottles available for consumers, or DIY customers.)

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