Apiezon N Grease

Apiezon N Grease is silicone-free and widely recognised and recommended as the cryogenic vacuum grease of choice.

This cryogenic grease is specially formulated to exhibit craze-free performance characteristics at low temperatures and withstand frequent cycling between cryogenic temperatures as low as -273°C and +30°C.

Apiezon N Grease is a silicone- and halogen-free cryogenic high vacuum grease which:

  • can withstand frequent cycling between cryogenic temperatures as low as -273°C and +30°C
  • is craze-free at cryogenic temperatures
  • has the ability to fill the micropores of adjoining surfaces, so improve thermal contact
  • does not suffer from contamination problems associated with silicone based greases such as ‘creep’ or ‘carry over’
  • exhibits a vapour pressure of 6 x 10-10Torr at 20°C
  • has powerful ‘gettering’ action, meaning it absorbs potentially harmful grease and chemical impurities on metal and glass surfaces
  • is easy to clean, use and remove as it is soluble in hydrocarbon solvents
  • Available to buy in 25g tubes.


When should Apiezon N grease be used?

Apiezon N grease is the first choice sealant and heat transfer medium for low temperature applications. Being pliable at room temperature but freezing solid at cryogenic temperatures, it allows for easy mounting and removal of sensors or samples without causing damage.

Important in low temperature testing of semiconductor chips, laser diodes and crystals, etc., Apiezon N Grease is used to improve thermal contact between the sample boat and cold finger of a cryotstat. This cryogenic thermal contact grease ensures that samples are at the lowest possible temperatures to improve test sensitivities.

Apiezon N Grease can also be used in a variety of applications at ambient temperatures such as when added cushioning is required. N Grease has a special additive which gives it a tenacious, rubbery consistency which absorbs vibrations in equipment, making N Grease invaluable in fragile glass to glass joints, like burette taps, which continually risk fracture.