Krytox XHT AC High Temperature Grease | Anti-Wear | Rust Protection


Krytox XHT AC grease is a special high temperature greases with low oil evaporation that provide anti-wear and rusting protection, and are compatible with all elastomers and plastics. These greases have excellent lubrication over a broad temperature range, but are designed to work best at temperatures over 200 °C (400°F). Krytox XHT AC series greases are nonflammable, oxygen-compatible, and chemically inert. Krytox greases provide extended lubrication intervals and longer equipment life.

The Krytox XHT AC series greases are an extension of the Krytox 240 series and Krytox GPL 22X series, but are designed to give higher performance in the 204–302°C (400–575 °F) range. Krytox™ XHT-AC series greases contain sodium nitrite to offer anti-corrosion performance. These greases should be used below 320 °C (608 °F), where the polytetrafluoroethylene (PTFE) thickener could begin to melt. The base oil is an extremely viscous oil that provides good viscosity and lower evaporation at high temperatures. Krytox grease is made to a standard NLGI grade 2. PTFE is the standard thickener.

Applications for these lubricants are generally of a critical nature, such as when temperatures reach extremes that conventional lubricants cannot handle. Krytox XHT AC and XHT ACX greases are expected to be durable in highly aggressive environments. Where failure of components is not an option, because of durability, warranty, safety, loss of productivity, or downtime, Krytox lubricants are the ideal choice in a wide range of industries and applications.


Application Bearings, Paint plant conveyor bearings, Corrugator and paper machine bearings, Aluminum can manufacturing bearings, Welding machines, High temperature fans, Textile equipment, Tenter frames, High temperature ovens, Conveyor systems in glass and aluminum plants, Textile calender roll bearings, Brick kiln car bearings, Valve lubrication, Ventilation fan bearing grease, Rod mills
Base Formulation Perfluoropolyether
Additives None
Thickener Polytetrafluoroethelyne
Specification Met NSF H-1; ASTM D1743
Flammable (Y/N) N
Food Grade NSF H-1
Temperature Range °F -20°C -300°C
Viscosity @ 100°C 47 cSt
Viscosity @ 40°C 500 cSt
Oxygen Safe (Y/N) Y
UOM Each
Lead Time None

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