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    Polar lubricant (was) Reaching the pole. (was Nautical Almanac)
    From: Jared Sherman
    Date: 2002 Jul 3, 11:33 -0400

    Robert-
     You mention a silicon lubricant somewhat less than wholeheartedly. I had no 
    plans to go to polar regions but on buying a used sextant found that 
    congealed 20-year old grease needed to be removed even for a more temperate 
    winter, and I happened to have a tube of Dupont Kyrtox grease to use for it. 
    If you, or anyone else, wants a "permanent solution" I would suggest buying 
    Krytox from an industrial supplier. It is a white grease (also, a clear oil) 
    that is related to Teflon. Dupont claims it will function from -70F to +700F 
    and it is also totally non-reactive in pure oxygen, chlorine, sulphur, acids, 
    and other environments that will eat whatever it is trying to lubricate.
     Needless to say the grease does not migrate, stain, or stiffen up.
    
    
    

       
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