BRILLIANT is a fluorescent UV dye for Vehicle A/C systems with R12, R134a, R1234yf, Hybrid & Electric Vehicles. It allows to quickly and accurately locate refrigerant gas leaks. BRILLIANT has to be introduced in the vehicle A/C system; at the leak point the product will get out and stand out when lit by a UV lamp. Benefits: Precisely locates refrigerant gas leaks. Solvent-free. Conforms to SAE J2297 and SAE J2298. Visible to any UV lamp. Includes advice stickers. Does not clog A/C System or Recovery units.