Use the LeakFinder LF60CS adapter to inject Universal LeakFinder dye into modern R-1234yf air conditioning systems. LeakFinder ultraviolet fluorescent universal dyes provide the most precise leak detection for all automotive air conditioning systems containing R-134a, R-1234yf, or other widely used refrigerants. The LEAKFINDER brand was designed to be a cost-effective solution for end-users in the automotive aftermarket. The LeakFinder product line is perfect for DIY jobs and small to mid-sized automotive repair shops. The ultraviolet fluorescent universal dye provides the most precise leak detection for all automotive air conditioning systems containing R-134a, R-1234yf, or other widely used refrigerants. Our dyes can find the smallest and most problematic leaks that would otherwise be impossible to detect.