R-134a Auto Air Conditioner Leak Detector And Sealer ? Stops most Air Conditioner Leaks. Usually from Rubber Parts, Including Gaskets, Hoses and O Rings ? Red Dye Locates Leaks Needing Mechanical Repair ? Charges into Air Conditioning System with Standard R-134a Valve and Hose DO NOT USE IN R-12 A/C SYSTEMS |