Grease, Rust Preventive, Rocket Propellant Compatible Low Temperature.
Castrol Braycote 631RP is a smooth, buttery, off-white NLGI #2 grease based upon a perfluoroether oil. Braycote 631RP is nonflammable and is in general chemically inert.
Braycote 631RP is thermally stable either alone or in the presence of oxygen, has exceptionally low volatility, and has little tendency to form deposits.
In addition Braycote 631RP exhibits excellent lubricating properties, good dielectric properties, and shear stability
Temperature Range: -54ºC to above 204ºC (-65ºF to above 400ºF)