Close this search box.


KRYTOX™ 250 AD Extreme Pressure Performance Lubricant

Krytox™ 250 AD is a black grease containing molybdenum disulfide added as an extreme pressure additive gear and bearing high load. It offers the highest viscosity of the 250 Series with a viscosity of 502 cSt at 38 ° C and 44 cSt at 99 ° C. The operating temperature range of Krytox™ 250 AD is -29 to 316 ° C.

KRYTOX™ 250 AD Extreme Pressure Performance Lubricant

Krytox™ 250 AD is the lubricant of choice for demanding conditions: high and low temperatures, extreme pressure and harsh environments. Krytox greases are used in a variety of limited motion mounting systems associated with aircraft engines, such as an oil tank mounting bracket for a Trent 1000 engine.

Since the first commercial application over 50 years ago, Krytox™ Lubricants have provided consistent, superior and long-lasting performance. Today, with new additives for new challenges, Krytox™ lubricants continue to provide extreme performance in extreme conditions. 

The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. In terms of weight, a typical Krytox™ oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine. All standard grades of grease are thickened with high-efficiency PTFE, the formula of which is (CF2-CF2) n. This special high-efficiency thickener has a 325 ° C (617 ° F) melting point and has low molecular weight and submicron (0.2 μ) particle size for increased bearing performance.


  • Carbon, oxygen and fluorine
  • Polytetrafluoroethylene additive

250 AD Features

  • Low coefficient of friction
  • Good resistance to water
  • superior performance with advanced high-temperature stability characteristics
  • Non-flammability
  • Chemical and biological inert
  • High load capacity
  • Registered in NSF as category H1 for “accidental contact with food”

Krytox™ 250 AD Applications 

It can be used in:

  • Gaskets for coupling the oxygen system, valves, regulators etc.
  • Liquid fuel rocket engines and ground support systems
  • Instruments, gyros and gimbal
  • Seals, valves and pneumatic systems
  • Bearings
  • Threaded guides and ball screws
  • Electromechanical actuators
  • Ribbed shaft couplings for auxiliary motors
  • Non-conductive lubricant for sealing electrical connectors
  • IR and optical sensors


  • ASTM D445
  • ASTM D2595
  • ASTM D97
  • ASTM D217
  • ASTM D942
  • ASTM D2512
  • ASTM D6184

Sizes Available

Syringe Tube Jar Cartridge Pail
0.5 oz. 2 oz. 0.5 kg 0.8 kg 5 kg
1 oz. 4 oz. 1 kg 7 kg
2 oz. 8 oz. 20 kg
Product categories

Our Brands


To request any type of technical sheet or safety sheet.

Can't find the right product?

Talk to a Technical Representative

With more than 200 sales professionals into the marketplace, we offer the most compelling local presence in your native language.

Can't find the right product?

Please send us your request to receive customized support by your local dealer, either for specific products or special requirements.