EasyDye is a fluorescent leak detection dye for air conditioning and refrigeration systems. It can quickly and easily be injected into a system to find refrigerant leaks anywhere in the system. It will work with all commercially available oils, and it is perfect for split systems, heat pumps, microchannel coils, packaged units and mini-splits. Scan the system using Nu-Calgon's UV Leak Detection Kit flashlight (4050-15). A bright green-yellow glow will pinpoint the location of all leaks in the system. THE NU-CALGON 4050-51 EASYDYE IS FOR PROFESSIONAL USE AND SHOULD ONLY BE USED IN ACCORDANCE WITH ALL REGULATIONS AND PROPER SERVICE PRACTICES. PLEASE SEE PRODUCT LABEL OR CONTACT NU-CALGON DIRECTLY FOR USE INSTRUCTION. IT IS RECOMMENDED TO UTILIZE THE APPROPRIETE PPE (PERSONAL PROTECTIVE EQUIPMENT) DURING APPLICATION.