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.

 

Thermal coupling medium

Apiezon N grease is important for the coupling of cooling systems to superconducting magnets, cryostats, temperature sensors or any system which is required to reach cryogenic temperatures as quickly as possible. 

 

Sensor mounting medium 

Apiezon N grease is an ideal sensor mount, especially suited for the mounting of sensors within holes. Pliable at room temperature, it solidifies at cryogenic temperatures to ensure the easy mounting and removal of sensors without causing damage. 

 

Sample mounting medium 

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 and sample boat or the sample boat and cold finger of a cryostat. This ensures samples at the lowest possible temperatures and improved test sensitivities. 

 

Cryogenic vacuum seal 

Apiezon N grease exhibits extremely low vapour pressures at ambient temperatures. Vapour pressures are further improved by reductions in temperature to the cryogenic region, as demonstrated by extrapolation of the vapour pressure graph overleaf. 

 

Silicone free 

As a hydrocarbon based grease, Apiezon N grease is highly resistant to "creep" or “carry over”, a phenomenon associated with silicone-based products. Silicone has a tendency to travel away from the area of application and contaminate adjacent surfaces. 

 

Easily removed 

Apiezon N grease is easily removed by wiping with a soft clean lint free cloth. Any residues of grease can be washed away with warm soapy water, by using any aromatic hydrocarbon solvent (toluene, xylene), chlorinated hydrocarbons (trichloroethylene).

 

Compatibility 

Apiezon N grease is compatible with a wide range of o-ring materials including:- 

- Viton 

- Silicone 

- Nitrile (>30% nitrile content) 

- Nylon 

- Polyurethane 

- Polyethylene 

- Polypropylene 

 

Due to its hydrocarbon base N grease is not compatible with:- 

- EPDM ethylene propylene diene M class Rubber

- EPR (ethylene propylene rubber) 

- Butyl rubber 

- PVC seals