With a vapor pressure of lower than 10-10 Torr at 20°C (68°F), Apiezon AP 100 is a lubricating grease designed for use with equipment present within ultra high vacuum systems. The key feature of AP 100 are that Apiezon AP 100 exhibits extremely high levels of lubricity. Indeed, with a lubricity 4 Ball Test value of 450 kg, it provides eight times the level of lubrication offered by conventional petroleum based lubricating greases. Apiezon AP 100 is thus ideal for use in stepping motors and gearboxes where it affords protection against abrasion and corrosion, particularly under high load conditions. It can also be used to prevent the seizure of glass joints, stopcocks and taps or the corrosion of small metal fastenings. Apiezon AP 100 is formulated for use at ambient temperature. For higher temperature applications, Apiezon AP 101 or Apiezon H grease will provide more suitable alternatives.