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Stop Leak for R12 & R134a Use

Refrigerant Support Fluids

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Envirosafe Stop Leak for R12 & R134a Use Photo - Click to Enlarge

*For O Rings & Seals Only 

Finally, a way to minimize the costly repairs to your auto air conditioner. Each and every year it is common to replace the lost refrigerant that leaks out over the winter months. This procedure is very costly and annoying and adds to the negligible affects to our environment with global warming.

Many leaks in the automotive air conditioner occur within the o-rings and seal areas. As o-rings and seals age, the materials begin to crack and shrink. Deterioration is the natural tendency of rubber and the heat from the engine exacerbates the deterioration.

Enviro-Safe Stop Leak comes in 3 ounce aerosol, 8 ounce concentrate, and 1/2 ounce vacuum sealed cans.

  • The 3 ounce aerosol can contains enough Stop Leak to repair o-rings in up to a  3 or 4lb a/c systems. 
  • Stop Leak VS is a vacuum sealed can that is perfect for the single use and may be used in most a/c systems such as R12, R134a.
  • The 8 ounce concentrate is packed in a convenient size container for the professional a/c technician.  Install with a universal dye/oil injector tool. #5055, 5060, or 5130.  You can also use the search button at the top of the page to find. 

For Vacuum Seal product--must be used in non-back flow device hose (should be able to blow through each end of hose).  We recommend the R12/22 charging hose available on our website under A/C Tools then hoses. Part #3345.  You can also use the search button at the top of the page to find. 

Aerosol product--connects to regular system with a 134a tap

for the 8 oz. product--use in conjunction with the injector tool (found under A/C Tools then "Tools") #5055, 5060, 5130, and 5165.  You can also use the search button at the top of the page. 


Due to the cost of shipping, small quanitites of this product cannot be shipped to Alaska, Hawaii, Canada, or any overseas country. However, we will ship this product in large quantities, please contact Enviro-Safe at 1-309-346-1110.

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*Haz/Mat fee not included.

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