Frequently Ask Questions and the Answers:

Can a consumer install GWR's Stop Leak Plus?

This professional product is not a product that is a local auto parts store, DIY outlet or on Amazon.  It was developed for a professional HVAC mechanic with the proper tools and training, not like the competitive type products with plastic quick connect hose.  That being said, if you are familiar with A/C repair and have the required tools necessary to test and install the product correctly this is an easily installed product.   It no different than installing refrigerant oil into an A/C System with an inline oil injector tool, the type used by technicians for the last 30 years.  Additionally, you need a set of manifold gauges and possibly a pump to pull the vacuum for testing leak down time.


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 small holes as exiting Refrigerant and oil creates little venturi like Black Holes of suction. During the migration through the hole, a particular size solid particulate finds it way into the hole, to form a plug that seals the leak. This "patch or plug" never hardens but remains pliable so it can flex with expansion and contraction of system.


How large a leak will it repair?

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


Will it seal evaporator leaks?

Yes, plus it will also seal leaks in the condenser. Additionally, the special oils will rejuvenate the compressor and any connection hoses, including gaskets and o-rings.


How much do I use?

A one gallon jug can provide enough liquid oil to seal up to 100 units and possibly more.  Sealing and conditioning one A/C system is based on the amount of Freon in that system.   If your system is determined to have a slow leak after inspection or vacuum is pulled and it still has a partial charge at service time, simply add ounces of Stop Leak Plus based on our formula.  Simply measure out an ounce of Stop Leak Plus for every 2 pounds of Freon, that would be 3 ounce for a 6 pound system, etc, etc.  Be sure to add the required amount of refrigerant until the system meets factory specs for a new charge while using the injector tool, or before injection if using our high pressure pump.


What residential and commercial products are available?

We have formulas for all type of systems, home, commercial, chiller, heat pumps, walk-ins, industrial refrigeration, commercial frozen food equipment and pretty much any other refrigeration system.  All of our unique products are revolutionary and easy to use because they are all basically an oil based liquid.  Product specific versions for R22, R410, R-502 and most all other version are available in bulk single gallons, 5 gallons and even 55 gallons, for installation by professional service companies and redistribution packaging companies.


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

Yes! There is a Stop Leak Plus for both R-12 and 134A and the new 1234  gases, plus it works with blended refrigerants as well.  Be sure to specify either the R12 or 134A version when dealing with automotive applications, oil type must match system being serviced.