Proseal for R-1234YF Systems, R1234yf Refrigerant Systems, R1234, 1 Can and Universal Charging Gauge

4oz can of Proseal for R1234yf systems. Forms a hard seal on metal, schrader valves, o'rings, gaskets, a/c condensers, evaporators, line sets and solder joints Enviro-Safe Proseal for R1234YF repairs minor leaks in mobile 1234YF a/c systems. Only for R1234YF applications Even though Proseal for R1234YF can form a seal on the schrader valve, when you hook up to it the seal will release and allow you to use the schrader if necessary. If there is still Proseal for R1234YF in the system it will reseal the schrader. For best results, use Enviro-Safe Prodry for R1234YF BEFORE using the Enviro-Safe Proseal to remove any moisture in your system. Moisture is corrosive and no one wants that in their system! 1 can of 4oz Enviro-Safe R1234YF ProSeal 3 oz will treat 1 vehicle. DO NOT use in ammonia systems DO NOT use in CO2 systems DO NOT use in R410a systems- Pressure is too high and will explode the can Gas propelled Installs the same way as refrigerant Cannot be added to a fully charged system. This comes with a brass hose with a universal fit on R1234yf systems.