Tecnoflon® PFR X1055B is a new perfluoroelastomer (FFKM) offering outstanding thermal resistance, lower compression set andenhanced sealing-force retention at extreme temperatures. Tecnoflon® PFR X1055B is suitable for most applications at temperaturesranging from –10 to 315°C.Along with excellent thermal resistance, it can offer broad chemical resistance in a wide variety of media, including acids,caustics, ketones, aldehydes, esters, ethers, alcohols, solvents, sour gases and hydrocarbons. However, it is not recommended foruse in severe aqueous and amine applications. This unique combination of thermal and chemical resistance makes Tecnoflon® PFR X1055B the sealing material of choice for hightemperature chemical and hydrocarbon processing industries as well as aerospace applications. At the same time its extreme cleanliness (low metal ion content with low extractables), along with its superior thermal stabilityand its plasma resistance, make Tecnoflon® PFR X1055B a very suitable sealing material for most dry plasma (etching, PECVD, LPCVD,metal CVD, PVD, ALD, plasma cleans) and high temperature thermal processes in the semiconductor manufacturing industry.Tecnoflon® PFR X1055B can be combined with other typical fluoroelastomer compounding ingredients; it can be mixed either by usingtwo-roll mills or internal mixers. Finished goods may be produced by a variety of rubber-processing methods.