Spiral Wound Gaskets unexpected. Produced as a substitute for NR (Natural Rubber); in general, SBR's can be used in similar applications as NR / IR elastomers, except in severe dynamic applications (e.g. requiring low heat build-up on flexing). SBR's can be used in tread compounds on car tyres, but not truck tyres. SBR's have inferior weathering and chemical resistance to most other elastomers.The base polymer is solely produced by the Asahi Glass company, and sold under the name ‘Aflas'. TFE/P vulcanisates exhibit similar thermal stability to FKM elastomers, but better electrical resistance and a different chemical resistance profile (e.g. sour gas, acids and alkalis, ozone and weather, steam and water, all hydraulic and brake fluids, alcohols and high energy radiation).Ring Joint Gaskets. However, they are not compatible to aromatic hydrocarbons, chlorinated hydrocarbons (e.g. M.E.K. and acetone), organic acetates and organic refrigerants.FKM elastomers exhibit better compression set, and the low temperature flexibility is relatively poor (except in certain fluids that would plasticise the rubber to some extent. It is always recommended to carry out functional tests under working conditions. TFE/P elastomers are finding wide application; mainly in oil field operations and chemical processing as o rings, rubber seals and rubber gaskets, cable insulating and jacketing, and hose liners. All these features increase comfort of functioning for the watch maker.epdm gaskets.The Assorted six piece Needle File Set has six files that can cover all the most standard filing needs. The files are precision made and can be used to file even delicate parts. Half round, round, round square, triangular and warding are the file types included in this set. There is a 12 piece assorted set of files which has round edge joint, Barrette, Knife, Crossing, Slitting and Pipping file types apart from the six file types found in the six piece set. With the Bergeon Assortment of 12 Escapement files, which are specialist files, the precise filing requirements of escapements can be easily met.viton gasket. These files come in a steel tube. The Bergeon Assortment of 12 round second hole files come with a round profile and are ued to file second hands. They too come encased in a steel tube.