EnviroSafe Proseal XL4 Fractional Injects for 1.5 Ton Systems, 8 Pack

Fractional Direct Injects for use in air conditioning systems to stop leaks up to 1.5 tons Pack of 8 Fractional Injects Made in the USA Individually boxed Compatible with refrigerants R1234yf, R22a, R12a, 410a Forms a hard seal on metal, schrader valves, o'rings, gaskets, a/c condensers, evaporators, line sets and solder joints Seal on the schrader valve will release when you hook up to it, allowing you to use the schrader if necessary If there is still Proseal XL4 in the system, it will reseal the schrader One-time use Concentrated formula No need to pump-down R410 or other units No injection-hose or caulk-gun needed