Fomblin® Y from Solvay Solexis S.P.A. is unique perfluoropolyether vacuum oil that is biologically and chemically inert, waterproof, and insoluble in most organic solvents. FOMBLIN Y has good dielectric properties and is compatible with plastomers, elastomers and most metals in a wide temperature range. It has low vapor pressure, volatility and surface tension, as well as has high specific gravity, stability and heat resistance. Before adding Fomblin Y, thoroughly clean all old liquid in the pump.