Posted by jlyle on May 02, 2004 at 18:24:21:
In Reply to: O Ring Grease posted by Elaine on May 02, 2004 at 16:40:37:
"In the past, camera O-rings were nearly always made from Nitrile-Butadiene Rubber (NBR), usually black, and the appropriate lubricant is either petroleum gel (i.e., Vaseline, or Nikonos Grease), or preferably Silicone grease (e.g., Molycote 111). Nowadays, Silicone O-rings are common. These are often coloured, and can be recognised by their textural similarity to silicone diving masks. Petroleum gel can be used on some silicones, but silicone grease will cause the material to swell and fail in service. The correct lubricant for silicone rubber is fluorosilicone grease (e.g., Molycote FS1292)."