| There are specialist lubricants a plenty for O rings, depending on the what material your oring is made out of - Nitrile, polyurethane, PTFE, Silicone, etc. If its a radial or axial seal, and if its static (say a lid) or dynamic (say a pushrod seal). Also if your prime considerations are lubrication, seal itegrity, temperature range etc.. For our purposes Silicone grease is best bet (for non silicone orings - if its a black oring then its probably not silicon - silicone grease will cause silicone orings to swell). There are better ones but pricey and harder to come by. Remember the other material also that the grease comes into contact with. Petroleum based grease will craze and crack some plastics in no time, while silicone grease is pretty inert. |