Krytox Overview

June 19, 2017

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Krytox History & Product Overview

For the full Krytox product list, click here.

Discovered in 1959, the polymer that would become known worldwide as Krytox showed remarkable thermal and oxidative stability. Potential uses envisioned then included lubricant for the MACH 3+ turbine engine, hydraulic oil, rocket gearbox lubricant, and even gyroscope oil.

In 1964, new perfluoropolyether (PFPE)-based grease formulations, developed jointly with the U.S. Navy and Air Force. The result being MIL-G-27617, developed specifically for Krytox. The first commercial sales of Krytox were for nonflammable lubricants for the Apollo space program in 1965.

Prior to 1981, the only commercially available Krytox lubricants were aerospace oil and greases. Since then, a very wide range of industries and applications adopted PFPE-based oils and greases. There are PFPE oils and greases for industrial operations, vacuum pump fluids, incidental food contact, automotive uses, reactive gas, and, of course, military applications—to name just a few.

Krytox Today

Today, of course, it’s our well-known trademark for high-performance synthetic lubricants used for a variety of applications. The oils are made from only fluorine, carbon, and oxygen—a mixture of compounds collectively known by many names—including PFPE, perfluoroalkylether (PFAE), and perfluoropolyalkylether (PFPAE). These perfluorinated oils and greases deliver high performance, perform at wide temperature ranges, and provide superior quality lubrication under extreme conditions in comparison to hydrocarbon alternatives. And, with a global distribution network and world-class technical service, it is the lubricant of choice for extreme conditions and performance.

The use of Chemours unique PTFE thickener provides superior chemical and thermal stability to all Krytox grease product lines. Many greases are also available with additional anti-wear and anti-corrosion additives to further boost performance in critical operations.

Krytox performance lubricants provide superior performance and extended life as lubricants, sealants, and dielectrics. With exceptional performance and reliability in the toughest conditions—where productivity matters and downtime costs, it can contribute significantly to lowering the cost of doing business.

Krytox Grades by Product:


General Purpose Applications
GPL 10X Oil / 20X Grease	The GPL 10X oil & 20X grease series contains no additives and can be used on components that come in contact with chemicals.	Typical applications include valves or bearings in contact with chemicals, seal barrier fluids, instruments, and oxygen systems.
GPL 21X	The GPL 21X series contains molybdenum disulfide for extreme pressure (EP) conditions and should be used for slow speed or heavily loaded applications where there is no danger of the molybdenum disulfide additive reacting with chemicals or causing contamination.	Typical applications include highly loaded gears, CV joints, U-joints, splined shafts, and commercial electrical switches.
GPL 22X	The GPL 22X series contains sodium nitrite corrosion/ anti-wear inhibitor and is ideal for corrosive environments where there is no danger of the sodium nitrite additive reacting with chemicals or causing contamination problems.	Typical applications are automotive bearings, sealed pump bearings, electric motor bearings, and general purpose bearings.
GPL 29X	The GPL 29X greases have EP and anti-corrosion additives and have been formulated for high-temperature applications that need both high load carrying capacity and anti-corrosion protection.	Typical applications include low-speed conveyor bearings that are subject to vibration, moist conditions or frequent temperature cycling that could allow condensation and rusting to occur.
GPL 2EX	The GPL 2E(X) lubricants formulated using new anti-rust additives. This grease is similar to the GPL 22X series greases but contains a non-nitrite anticorrosion additive that is the salt of an organic acid. The new additives are effective at low concentration levels, are environmentally friendly, and do not pose any restrictions on the long-term recyclability of the grease.	Typical applications are automotive bearings, sealed pump bearings, electric motor bearings, and general purpose bearings.
Lubricants for Aerospace Applications
143	Krytox 143 series oils are clear, colorless fluorinated synthetic oils that are non-reactive, non-flammable, safe in chemical and oxygen service, and long-lasting.
240	Krytox 240 Series greases are white, buttery greases with all of the same properties as the 143 series oils that they are made from, but they are in grease form. The 240 AZ, 240 AB, and 240 AC meet MIL-PRF-27617 general specifications. Many of the other 240 series products meet other specifications for individual applications.
250	Krytox 250 series EP greases are black greases that contain molybdenum disulfide added as an extreme pressure additive for highly loaded gears and bearings.
283	Krytox 283 series anti-corrosion greases are white greases that contain sodium nitrite. These grades provide rust protection at ambient temperatures, corrosion protection at high temperatures, and anti-wear protection.
Lubricants for Extended Performance Applications
XP 1A series oils/XP 2A series greases	The XP lubricant line offers greases and oils with a soluble additive in the oil. It will not wash away or be left behind with the grease thickener. These newly patented additives enhance the performance of PFPE greases and oils, giving them improved performance properties. Bearings run quieter and wear less because there are no solid additives to make noise. Lower wear will extend bearing and component life. The anti-corrosion protection of the additive will reduce rusting and allow longer grease and bearing life. The extreme pressure properties of the additive protect bearings under high loads. These products are used in any lubrication application.
Lubricating Fluids for Vacuum Pump Applications
Vacuum Pump Fluids	The Vacuum pump fluids are used in vacuum pumps and systems and are used when controlled vapor pressure, nonflammability and non-reactivity are needed. These products can be regenerated back to original properties and reused.
Lubricants for Extra High-Temperature Applications
XHT- S, SX	Special high-temperature grease with low oil evaporation that provides long bearing life and is compatible with all elastomers and plastics. It has excellent lubrication over a broad temperature range but is designed to work best at temperatures of 200–300 °C (400–572 °F). It is nonflammable, oxygen compatible, and chemically inert.
XHT- AC, ACX	This grease is a special high-temperature grease with low oil evaporation that provides long bearing life and is compatible with most elastomers and plastics. Grease contains sodium nitrite corrosion/anti-wear inhibitor and is ideal for corrosive environments where there is no danger of the sodium nitrite additive reacting with chemicals or causing contamination problems. It has excellent lubrication over a broad temperature range but is designed to work best at temperatures of 200–300 °C (400–572 °F). It is nonflammable, oxygen compatible, and chemically inert.
XHT- BD, BDX, BDZ	Designed for use where the temperatures are in the 300 °C (572 °F) range and higher where there is a danger of melting the standard PTFE thickener. This grease uses a special non-melting high-temperature thickener that also provides extreme pressure properties and works as a solid lubricant if the base oil is depleted. The base oil is an extremely viscous oil that provides good viscosity and lower evaporation at high temperatures. Grease is slightly tacky and will coat the surface and stay in place. The oil in the grease can begin to slowly degrade at temperatures above 330 °C (625 °F), and this will occur at an increasing rate as temperatures increase. Re-lubrication could be required at these temperatures to achieve optimum life. Maximum use temperatures for these greases are 360 °C (680 °F) with intermittent spikes to 400 °C (752 °F).
Krytox Lubricants for Specialty Applications
GPL 246	GPL 206 with copper added, so it will conduct electricity.
GPL 407	A silica thickened non-melting thickener for low-speed applications in conveyors and other such applications where temperatures might cause PTFE melting.
GPL 577	A grease containing a special EP additive and anti-corrosion additives for use under high loads where corrosion might be a factor
LVP	A special high vacuum grease for applications where outgassing must be avoided. This is used in high vacuum industries and for sealing joints in laboratory applications
XP 2C5	The XP 2C5 grease contains an oil soluble additive that is effective at preventing corrosion and reducing wear. It also contains an extreme pressure additive. Typical applications include those in potentially corrosive atmospheres, where vibration or shock loading may be significant and where an element will spend more time experiencing a mixed film or boundary lubrication versus the desired full film or hydrodynamic lubrication.
XHT EP 298 and EP 299	These greases have been formulated for high-temperature applications that need both high load carrying capacity and anti-corrosion protection. Typical applications include conveyor chains that are subjected to moist conditions or frequent temperature cycling that could allow condensation and rusting to occur.