TRIBOLUBE F-219 Solvent is a low molecular weight PerFluoroPolyEther (PFPE) designed to be used as a solvent for PerFluoroPolyEther (PFPE) greases. Tribolube F-219 is formulated to be compatible and completely miscible with all PFPE fluids at all temperatures. In addition to being used as an excellent sol- vent, Tribolube F-219 can also act as a diluent in the application of more viscous PFPE fluids and greases.