Air conditioning Freon and additives includes polyol esther oil that is specially formulated to be compatible with R12 and R134 freons and PAG Oil which is compatible with R134 only and mineral oil that is compatible with R12 only. MEI Airsource offers only the finest air conditioning Freon and additives available. Our air conditioning Freon and additives category includes chemicals needed to detect leaks in the air conditioning system. Leak detectors from MEI Airsource are available in many forms, some kits include UV lights and dye injectors. We also offer freon from Airgas Refrigerants. Our Airgas Refrigerants freon is the finest freon available, due to price volatility our price will frequently change to stay competitive with the air conditioning Freon and additives market.