Castrol Braycote 1729 Chemically Inert Grease NLGI #3 - 1.75 lb cartridge

Castrol Braycote 1729 Chemically Inert Grease NLGI #3 - 1.75 lb cartridge
Castrol Braycote 1729 Chemically Inert Grease NLGI #3 - 1.75 lb cartridge
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Castrol® Braycote® 1729 Chemically Inert Grease NLGI #3 - 1.75 lb cartridge

Castrol Brayco 1729 is a smooth, translucent NLGI #3 grease. It is based upon a low molecular weight perfluourinated polyether oil and a tetrafluoroethylene gelling agent. Brayco 1729 is nonflammable, chemically inert to strong acids and alkalies, and is oxidizer compatible. Castrol Fluoroclean™ X100 and Castrol Fluoroclean™ He can be used to remove this lubricant. Refer to the data sheets for information regarding these products.


Brayco 1729 is recommended for those applications in which lubricant compatibility with aggressive chemicals and oxidants in direct or indirect contact is of primary concern. Brayco 1729 is stable when exposed to both concentrated acids and bases, and oxygen. Perfluorinated greases, in general, exhibit excellent shelf lives due to their intrinsic inertness.



D 1403 Penetration, 25°C (77°F), mm-1
Worked, 60 strokes
D 2265 Dropping Point, °C (°F) 178 (352)
D 2266 Four-Ball Wear-Test, AWSD, mm
1200 rpm, 40 kgf, 1 hr, 75°C (167°F)
D 2596 Four-Ball EP Weld Point, kgf 800+ No Weld
FTM 5039 Copper Strip Corrosion
24 hrs @ 99°C (210°F)
FTM 321 Oil Separation, % wt
22 hrs @ 149°C (300?F)
D 2595 Evaporation Loss, % wt
22 hrs @ 204°C (400°F)
D 2512 LOX Impact Sensitivity
20 drops, 1100 mm
Base Oil Properties
Knudsen Vapor Pressure, torr
@ 20°C (68°F)
@ 100°C (211°F)
1 x 10-4
1 x 10-1
D 287 Specific Gravity @ 16/16°C (60/60°F) -42 (-45)
D 445 Kinematic Viscosity, cSt
@ 100°C (212°F)
@ 40°C (104°F)
9.46 67.73
D 2270 Viscosity Index 119

Temperature Range:

-40°F to 350°F (-40°C to 177°C)


Brayco 1729 is compatible, under normal operating conditions with conventional metals, plastics, and elastomers. Brayco 1729 may be adversely affected by Lewis Acids such as aluminum chloride, at elevated temperatures. Rubbing surfaces of aluminum, magnesium, or titanium may react with Brayco 1729 under certain conditions. Such systems should be thoroughly evaluated. Surfaces must be well cleaned of organic rust inhibitors prior to grease application to insure proper lubrication.

Removal of unwanted grease from grease applied surfaces:

The composition of this product is a mixture of small PTFE particles (which won't dissolve in anything) and a perfluorinated polyether liquid. We have found that Castrol® Fluoroclean™ HE is an effective solvent for the liquid component of the formulated composition and aids in the removal of the grease from places where it is no longer needed or wanted.


Brayco 1729 is available in 1.75 pound cartridges.