The LeakFinder A/C Leak Sealant, No. LF200CS, from Tracer Products is a single-use syringe injector designed to seal pinhole leaks in accumulator/receivers, evaporators, condensers, O-rings, hoses, and more. The sealant is easy to use and is compatible with all popular refrigerants, including R-1234yf systems. The sealant formula is also compatible with electrically-driven A/C compressors used in hybrid/electric vehicles. With the included patented dual adapter, users can easily connect to either R-1234yf or R-134a systems.