Krytox™ a product of The Chemours Company

What is the NLGI* consistency of Krytox™ grease grades?
Greases are formed by mixing the base oil with a thickener to form a grease. Krytox™ greases use a special high-thickening efficiency, low molecular weight polytetrafluoroethylene (PTFE) with very small particle sizes as their thickener. This is one of the  most thermally stable thickeners for high-temperature, long-term  greases. The higher thickening efficiency of the special PTFE thickener allows Chemours to formulate grease to maximize oil  content for improved grease performance.

* National Lubricating Grease Institute

Greases can be formulated with different viscosity oils to handle different temperatures and load conditions. High-viscosity oils can be used in greases for high temperatures or heavy loads or low-speed applications. Low-viscosity oils can be used in greases where low-temperature properties are important or speeds are higher. Lower amounts of thickener form softer or more fluid-like
greases. Higher solid levels form harder, stiffer greases.

Additives are often added to the grease to enhance anticorrosion protection, raise load-carrying ability or help reduce wear. Our standard grease grade is NLGI Grade 2; however, upon request we produce NLGI Grades 000 through 6.

Do I need to do anything special before using Krytox™ in bearings?
Before adding Krytox™ grease to a bearing, the bearing should be cleaned of all existing greases, oils, or preservative oils used during storage. If hydrocarbon oils are left in a bearing, the oils can form carbon deposits at high temperatures, which may accelerate bearing failure. Please request K-22116, “New Bearing Preparation with Krytox™ Performance Lubricants”  for the
recommended cleaning and re-packing procedure, as well as guidance on how much grease to use and speed considerations.

Is ongoing lubrication required once we’ve begun using Krytox™? 
Re-lubrication of bearings may be required, typically every 1 to 3 months for corrugators, depending on the equipment operating temperature. For other applications, re-lubrication intervals can be from months to years—or potentially never, in the case of sealed systems.

Can I mix Krytox™ grease with other greases?
The performance benefits of Krytox™ grease will not be realized if Krytox™ is mixed with a non-perfluoropolyether (non-PFPE) grease. The performance of the grease mixture will be limited by the properties of the non-PFPE grease in the mixture. Krytox™ grease will not react with the other grease or cause decomposition or any hazardous reactions. The mixing tests initally performed by DuPont have shown that the mixture sometimes softens up by about one penetration grade when it is heated up. This normally will not be enough change to cause any significant problems.

The Krytox™ grease will not stop the other lubricant from breaking down from heat and oxidation. It is likely that the additives in the hydrocarbon grease have coated the bearing surfaces and the Krytox™ grease will not be able to adhere to the bearing, so most of it might get thrown out of the bearing.

Characteristics of Krytox™ Performance Lubricants

What approvals and certifications do Krytox™ Lubricants have?
Krytox™ lubricants have the following certifications: