R12 STOP LEAK Charge, 4 oz. Can, Leak Stop For R-12 Systems

(1) R12, Stop Leak Charge, 4 oz. Can, Leak Stop, For R-12 Systems **Always charge in the "INVERTED" position! * We are a UPS Certified Hazardous Materials Shipper and this item will ship legally with all required information.   This can requires a K28 Can Taper. If you need a K28 Can taper please go to the "Can Tapers" category and search K28. Aerosol For Automotive A/C Systems or Commercial Refrigeration Systems. With age, o rings and seals will shrink and deteriorate. When Stop-Leak for R12 Systems is added to your a/c or refrigeration systems, it reconditions the rubber o rings, compressor gaskets, service valve seals and expansion Valve Body leaks! When the Stop Leak product is installed in an air conditioning or refrigeration system, the product mixes with the refrigerant and oil. As the product circulates in the system, it comes in contact with the o’rings and seals causing them to swell, resulting in "no leak". Stop leak will not repair large Mechanical leaks, t