The Braycote line of high vacuum greases has been developed to cover a wide range of temperature and chemical environments. The Braycote greases are perhaps best known for their high chemical inertness which derives from their basically completely fluorinated chemistry, both in terms of the “base liquid”, which is very similar to a diffusion pump fluid, and the solids phase, which is a micro-colloid of tiny polytetrafluoroethylene (PTFE) “dispersion” particles.

Braycote 600EF : This grease is designed to operate in the presence of fuels, oxidizers, and in applications of deep space vacuum. It is used in gears, ball and roller bearings, electrical contacts, and O-rings. This grease is highly recommended for applications where temperature extremes and/or low vacuums are routine, such as cryogenic coolers, laser optical systems, or hostile chemical environments. Perfluorinated greases, such as Castrol Braycote® 600 EF exhibit excellent shelf life due to their intrinsic inertness.

Castrol Braycote 296 : This greases is smooth off-white colored perfluoropolyether greases in NLGI grades 0, 1, and 2 respectively. Each Castrol Microcote product uses a proprietary base fluid thickened with a special polytetrafluoroethyelene (PTFE) gelling agent with an average particle size of 0.8 μm. This product is specially formulated to provide wear protection in most load and speed conditions under high or extreme vacuum conditions. This product offers excellent lubricity, thermal stability, low volatility, good shear stability, low acute toxicity, and contains no Sodium or other alkali metal containing ingredients. This grease is nonflammable and chemically inert.