Krytox™ 240AA Grease is an NLGI Grade 2, nonflammable, aerospace-grade PFPE grease with a PTFE thickener. Its base oil viscosity is 35 cSt at 38°C.
Krytox™ 240AA Grease is a pure-white, fluorinated synthetic perfluoropolyether (PFPE) lubricant providing complete nonreactivity and nonflammable performance for applications that demand consistency and reliability. Krytox™ 240AA is a white, buttery grease with all the same properties as the 143 series base oils.
Krytox™ 240AA aerospace grease exhibits best-in-class safety in chemical and oxygen service and delivers extremely long-lasting operational performance compared to conventional mineral oil–based lubricants and aviation greases.
Viscosity (cSt):
@ 20°C (68°F): 88
@ 38°C (100°F): 35
@ 99°C (210°F): 5.4
@ 204°C (400°F): 1.3
Vapor pressure of base oil:
@ 38°C (100°F): 1 x 10 e −4
@ 260°C (500°F): 0.8
Volatility of base oil (wt% loss in 22 hrs):
@ 149°C (300°F): 15
Oil separation (wt% loss in 30 hrs):
@ 99°C (210°F): 5
@ 204°C (400°F): 20
Pour point of base oil: −50°C (−60°F)
Texture: Buttery
NLGI Grade: 2
Mechanical stability (ASTM D217, 10,000 and 100,000 strokes): No change
Oxidation stability @ 99°C (210°F): 0 psig pressure drop after 600 hrs
Liquid oxygen impact (ASTM D2512, NASA MSFC 106B): Pass
Grease density at 25°C (77°F): 1.91 g/mL
Estimated useful range: −51°C to 177°C (−60°F to 350°F)
Primary Chemistry: PFPE (perfluoropolyether)
Low-viscosity lubricant (35 cSt @ 38°C)
Completely nonflammable
High-temperature grease stability
Completely nonreactive/inert
Precise performance
Low outgassing
Exceptionally long lasting
Low- and high-temperature operation (−60°F to 350°F)
Bearing or component wear or damage
Unsafe or flammable aviation grease chemistries
Ineffective grease protection for aerospace applications
Krytox™ aviation and aerospace greases can reliably be used in a wide range of complex or sensitive applications or where failure could be catastrophic. Krytox™ 240AA Grease has been designed with premium-tier performance and reliability across low and high temperatures.
Krytox™ 240AA can be used in a wide variety of medium-viscosity grease applications, including seals, O-rings, gaskets, low-temperature bearings, and oxygen service.
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