Shell Gadus S5 U150X is a perfluoropolyether based grease, thickened using polytetrafluoroethylene(PTFE). The synthetic base oil as well as the thickener are extremely resistant to oxidation or inert, even at very high temperatures. The product has a good resistance against strong acids and bases (alkali) and has very little affect on elastomers and plastic materials with the exception of teflon based materials. Temperature range > 300 degrees C. It is specially designed for lubrication of bearings working at extreme running temperatures. Lubrication of miniature bearings and precision mechanisms and for lubrication of bearings and seals that are in contact with reactive chemicals and gases. The product is approved for use by BAM for oxygen equipment where the lubricant may come in contact with oxygen under pressure (max 80 Bar g at 60 degrees C). When used on such applications, cleanliness is vital as the inert properties of the lubricant can easily be destroyed by hydrocarbon based contaminants..