Dielectric medium:
SF6 is used in the electrical industry as a gaseous dielectric medium for high-voltage circuit breakers, switchgear, and other electrical equipment, often replacing oil f illed circuit breakers (OCBs) that can contain harmful PCBs.
Medical use:
SF6 is used to provide a tamponade or plug of a retinal hole in retinal detachment repair operations in the form of a gas bubble.
Tracer compound.
as an etchant, as inert gas to fill casting forms, as a filler gas in tennis balls and so on.