Deepcool® A/C Oil ChillTM is a universal oil for refrigeration systems compatible with mineral oils, ester and PAG. Deepcool® A/C Oil ChillTM can be used in air conditioning and refrigeration systems containing deepcool 12a®, Deepcool 22a®, Deepcool 502a®, R-12, R-134a, R-22 and R-502. Contains an OEM-approved UV Coloring to help detect leaks. It is visible to the naked eye, visibility is improved with a UV LED lamp.