Performance Lubricants
Grease and Oil Lubrication for Sunroof Systems

Product Information
A Lifetime of Lubrication for Smooth Operation andNoise Mitigation in Sunroof Systems

prevention of noise, vibration, and harshness (NVH) andsuperior lubrication of mechanical systems.

There are multiple application areas within a sunroof
system that require lubrication from either a mechanical(drive system, control brackets, slides) or a noise
mitigation (moving panels, roof system frame, bodystructure, weather stripping) standpoint. The movementof metal on plastic, weather stripping to glass or painted
surfaces, among others, can generate noises typicallydescribed as squeaks, itches, or judders. When failureof these components is not an option, whether becauseof durability, warranty, safety, loss of productivity, ordowntime, Krytox™ products are an ideal solution for theautomotive sunroof industry.

• Ability to survive extreme temperatures and waterwashout• Non-damaging to plastic or elastomers• Noncorrosive to metals• Nonoxidizing• Extended lubricant life due to low volatility andoutgassing• Nonhazardous and nontoxic• Indefinite shelf life if unopened and stored in a clean,
dry location

Krytox™ performance lubricants are fully synthetic
perfluoropolyether (PFPE) oils and greases. They offer anexceedingly long life and outstanding properties for theAreas that require lubrication from amechanical standpoint:
Drive System—motor and cables
Control Brackets and Slides—attached tocables and the glass (moving) panel, control
the actuation of the sunroof
Areas that need lubrication from a noise
mitigation standpoint:
Seals/Weather Stripping—moving panels,
roof system frame, body structure• Both oils and greases are suitable for automatedspray application

ControlBrackets
AUT 2604
GPL 205Seals/WeatherStripping
GPL 105
AUT U14
GPL 205DriveSystem
AUT 2604
GPL 205• Seals fixed to the roof structure frame or glass• Seals fixed to the body structure

SunroofGlass Panel

Motor

Water
Drain

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Performance Lubricants

Krytox™ GPL 205 Grease

Krytox™ GPL 105 Oil

Krytox™ GPL 205 grease is a polytetrafluoroethylene(PTFE)-thickened PFPE oil that contains no additives
and can be used on various components, including thosethat are exposed to harsh environmental factors such as
rain, snow, dust, salt, cleaning and car care products, andcommon automotive fluids. Krytox™ GPL 205 has been
widely used by OEMs in mechanical sunroof systems
and seals.

Krytox™ GPL 105 oil is a clear, colorless, fluorinatedsynthetic PFPE oil designed to reduce friction and wear,
while extending equipment life in severe duty applications.
Krytox™ GPL 105 oil has been used by OEMs to prevent
weather stripping issues on sunroofs, such as NVH (noise,vibration, and harshness) and BSR (buzz, squeak, andrattle) that can occur over a vehicle’s lifetime.

Typical Properties

Krytox™ GPL 205

Estimated UsefulTemperature Range–36 to +204 oC(–33 to +400 oF)

Oil Separation, wt% after 30 hr,99 °C (210 °F)

5Max. Oil Volatility, % in 22 hr,
ASTM D2595, 121 °C (250 °F)

1

Oil Viscosity, cSt, at 40 °C (104 °F)

160

Oil Viscosity, cSt, at 100 °C(212 °F)

18

Krytox™ AUT 2604 Grease
Krytox™ AUT 2604 grease contains PFPE oil and a
special PTFE thickener for enhanced performancein mechanical application areas of sunroof systems.
Designed to provide a thin, long-lasting, and evenfilm on contact surfaces, it promotes smooth motion.
Krytox™ AUT 2604 is specifically formulated for a broad
temperature range, exhibiting very good low temperature
characteristics, as well as enhanced load and wear
performance at high temperatures.
Typical Properties

Krytox™ AUT 2604

Estimated UsefulTemperature Range–60 to +204 oC(–76 to +400 oF)

Oil Separation, wt% after 30 hr,
99 °C (210 °F)

4Max. Oil Volatility, % in 22 hr,
ASTM D2595, 121 °C (250 °F)

0.5

Oil Viscosity, cSt, at 40 °C (104 °F)

140

Oil Viscosity, cSt, at 100 °C(212 °F)

32

Typical Properties

Krytox™ GPL 105

Estimated UsefulTemperature Range–36 to +204 oC(–33 to +400 oF)

Max. Oil Volatility, % in 22 hr, ASTM
D2595, 121 °C (250 °F)

1

Oil Viscosity, cSt, at 40 °C (104 °F)

160

Oil Viscosity, cSt, at 100 °C(212 °F)18

The application of Krytox™ GPL 105 oil to weather
stripping offers enhanced protection from damaging
ultraviolet (UV) rays in sunlight.
Krytox™ AUT U14 Oil
Krytox™ AUT U14 is a proprietary blend of PFPE oils
containing a dye that, when exposed to a UV or "blacklight" gives off a yellow-green color. This allows visualconfirmation of coverage for quality control purposes, asillustrated in the pictures below:

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Performance Lubricants

Like Krytox™ GPL 105, Krytox™ AUT U14 combats NVH
and BSR problems and helps protect seals and weather
stripping in automotive sunroofs from UV damage.

Figure 1 Non-treatedTypical Properties

Krytox™ AUT U14

Estimated UsefulTemperature Range–36 to +204 oC(–33 to +400 oF)

Oil Viscosity, cSt, at 40 °C (104 °F)

50

Oil Viscosity, cSt, at 100 °C(212 °F)8

Performance Testing
Microscopic images show that Krytox™ AUT U14
wets the surface of weather stripping more uniformly
than other PFPE offerings, including standard GPL
105 oil. This leads to a lower static and dynamic
coefficient of friction, reducing slip-stick and noisein sunroof systems.

Figure 2 Treated with standard PFPE

Figure 1 shows a non-treated weather stripping surface.
Figure 2 shows how a standard PFPE oil can pool
unevenly on the surface.
Figure 3 shows how the special formulation of Krytox™
AUT U14 provides uniform coverage of PFPE oil.
Zins Ziegler Analysis
When an automobile is in motion, contacting surfaces
elastically deform and store energy. When this energy
is released, it can produce noise in the form of audible
squeaks or rattles.
Zins Ziegler is a standard automotive industry test
apparatus for measuring the noise potential of different
material pairings. It measures static and dynamic
coefficients of friction between material pairings tocalculate a risk priority number (RPN). The test methoduses standard protocols to simulate driving cycles up to100,000 kilometers. Material pairings with a high RPN are
more likely to have stick-slip issues and produce noise.

Figure 3 Treated with Krytox™ AUT U14

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Performance Lubricants

The table below illustrates how the presence ofenvironmental contamination (dust) greatly increases
the RPN number between weather stripping and painted
panels, thus increasing the propensity to create noise.

Coating the weather stripping with Krytox™ AUT U14
reduces the RPN number compared to untreated or acompetitive PFPE coating.

Zins Ziegler Analysis with China Dust

1-3: Low noise and no stick-slip

4-5: Noise and stick-slip can occur

6-10: Poor noise and stick-slip behavior

Compatibility

Using Krytox™ Performance Lubricants

Krytox™ lubricants are chemically inert and compatible
with virtually all automotive construction materials,including paint finishes, seal materials, glass, leather,
textiles, plastics, and metals.

For further advice on the use of Krytox™ oils and greases,
please consult the technical data sheet or call your local
Krytox™ representative for guidance.

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 1-844-773CHEM/2436 or outside of the U.S., call 1-302-773-1000.
© 2020 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.
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