Performance Lubricants

Extra High-Temperature (XHT) Lubricants
Product Information
Selection of the best lubricant involves analyzing
operating conditions and choosing from the many
synthetic and petroleum-based products available today.
While most petroleum products begin to degrade before
99 °C (210 °F) and cease turning at temperatures
just below –18 °C (0 °F), Krytox™ fluorinated synthetic
lubricants have operating ranges that are significantly
broader (–70–316 °C [–94–600 °F]).
Krytox™ lubricants are more effective at even higher
temperatures, regardless of operating duration. Usingbase oils, thickeners, and additives with chemistry
designed to create high and low viscosity, these products
are targeted for use solely in the very high-temperature
range. Available in several grades that offer anti-corrosion,
extra bonding, and non-melting properties, theselubricants have applications in a variety of industries,
including chemical, textile, tire, aviation, conveyor, glass,plastic film, non-woven manufacturing, and mining andmetal processing.
High-Temperature Greases
Because of its thermal stability and non-oxidizing
characteristics, Krytox™ is a natural high-temperaturelubricant.
Krytox™ XHT greases are available with useful temperature
ranges up to 360 °C (680 °F) for continuous use,with spikes to 400 °C (752 °F), when used in proper
metallurgy with periodic re-lubrication.

Krytox™ XHT Grades: Extreme Conditions,
Extreme PerformancePerformance Lubricants

Krytox™

Stability

Hydrocarbon Lubricant

Nonflammable
Krytox™ lubricants contain only carbon, oxygen, andfluorine. Because hydrogen is not present, theseproducts are nonflammable. They will not burn or support
combustion, even in 100% liquid or gaseous oxygen.
Chemically Inert
Krytox™ performance lubricants are not only resistant tooxygen, but are inert to virtually all chemicals used in avariety of industries.
They are insoluble in most solvents, but are soluble inhighly fluorinated fluids and in some supercritical fluids
such as CO2.
Thermal and Oxidative Stability
The temperature at which thermal decomposition ofKrytox™ oils takes place depends on the test method usedand how the point of incipient deterioration is measured.
By differential thermal analysis, deterioration occurs
at about 470 °C (878 °F) in the absence of air. The
isoteniscope technique shows an initial decomposition
point of 355 °C (671 °F) as measured by excess pressure
increase. At 355 °C (671 °F), the decomposition rate isapproximately 0.03 wt% per day. At 399 °C (750 °F), thedecomposition rate increases to 1.3 wt% per day. Whentested under nitrogen for six hours at 371 °C (700 °F),
Krytox™ showed no increase in neutralization number andno significant change in viscosity. The presence of air
does not substantially lower the decomposition point of
Krytox™ oils.

Krytox™
Hydrocarbon-based lubricants burn; Krytox™ does not.

During depolymerization, gaseous decomposition
products are given off, and the remaining fluid is lessviscous; but, no sludge or gummy deposits are formed.
Krytox™ grease in hydrocarbon solvent is not dissolved.

In oven at 232 °C (448 °F) for 40 hr:
Krytox™—0% wt loss

In oven at 232 °C (448 °F) for 40 hr:
Hydrocarbon—40% wt loss

Performance Lubricants

Krytox™

User Guide for Krytox™ XHT Greases
Standard Grades
XHT-S and XHT-SX
250–320 °C (482–608 °F)
Typical Applications: Small or large bearings withrelatively high speeds. Higher viscosity, lower
evaporation of oil extends life.
Anti-Corrosion Grades
XHT-AC and ACX
250–320 °C (482–608 °F)
Typical Applications: For machines that run for shorter
duration with frequent starts and stops. Frequently
cooled machines require anti-corrosion additives.
Extra Bonding Grades

Krytox™ XHT greases can be used in many industrial applications in extreme thermal conditions.

XHT-BD, BDX, and BDZ
300–400 °C (572–752 °F)
Typical Applications: For use when machine movement
is not purely rotational. This grease is non-melting forhigh-temperature use and offers better adhesion tosubstrate.

Technical Properties of Krytox™ XHT Lubricants*
Thickener

Volatility(ASTM D2595)

Viscosity (cSt)
at 100 °C(212 °F)

at 200 °C(392 °F)

at 204 °C (399 °F)(%)

AntiCorrosion
AdditiveGrade

TypeProperties

at 40 °C
(104 °F)

XHT-S

PTFE

Low friction max. temp. 300 °C (572 °F)

500

466.8

<1NA

XHT-SXPTFE

Low friction max. temp. 300 °C (572 °F)

738658.8<0.4NAXHT-ACPTFE

Low friction max. temp. 300 °C (572 °F)

500466.8<1Yes

XHT-ACXPTFE

Low friction max. temp. 300 °C (572 °F)

738

65

8.8

<0.4

Yes

XHT-BD

Non-melting

Extra strong bonding to substrate

500

466.8

<1NA

XHT-BDX

Non-melting

Extra strong bonding to substrate

738

65

8.8

<0.4

NA

XHT-BDZ

Non-melting

Extra strong bonding to substrate

1023

88

11.4

<0.3

NA

* This table gives typical properties (not specifications) based on historical production performance. Chemours does not make any express or implied warranty that these products willcontinue to have these typical properties.

Krytox™

Performance Lubricants

Additional Information and Literature Requests
The general physical characteristics of each Krytox™
fluorinated oil product category are described in thisbrochure. More detailed data sheets showing specificproperties for each Krytox™ product are available.

The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present
no health or safety hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any useof this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate under or arecommendation to infringe any patents.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISEWITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.

For product information, industry applications, technical assistance, or global distributor contacts, visit krytox.com or within the U.S. and Canada, call 1-844-773-CHEM/2436 oroutside of the U.S., call 1-302-773-1000.
© 2015 The Chemours Company FC, LLC. Krytox™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
Replaces: H-91812-5
C-10337 (10/15)