Pentafluoropropane based composition

The present invention, a pentafluoropropane, deca fluoro propane, pentafluoro-butyl methyl ether, and a second component selected from the group consisting of methanol, 1, 2-trans- dichloroethylene, and combinations thereof composition comprising a third component is provided which is selected from the group consisting of. Furthermore, the present invention comprises a composition, refrigerant, blowing agent, foam compositions, polyol premix, closed cell foam, sprayable compositions, and these analogs are provided.