Krytox® GPL 203 Grease

Severe-service grease for bearings, valves, seals and other applications where heat 
resistance, low volatility, chemical resistance and a wide temperature range are critical.
DuPont™ Krytox® oils and greases are based on perfluoropolyether (PFPE) oils. Chemically inert and safe for use around most 
chemicals and reactive gases, these lubricants are nonflammable 
and are also safe for use in oxygen service. Krytox® oils and 
greases are compatible with commonly used materials and 
do not damage plastics or elastomers, nor cause corrosion 
to metals.
Krytox® oils and greases are commonly used as lubricants in 
aerospace, automotive, industrial and semiconductor applications 
as well as in solving many other routine lubrication problems. In 
addition, they provide exceptionally long lifetimes in sealed-for-life 
bearings and they can extend relubrication intervals in bearings 
that require relubrication.
Krytox® base oil is a clear, colorless, fluorinated synthetic oil; it is 
a perfluoropolyether (PFPE) but is also called perfluoroalkylether 
(PFAE) or perfluoropolyalkylether (PFPAE) with the following 
chemical structure:
F-(CF-CF2
-O)
n
-CF2
CF3
 | where n=10–60
 CF3
The polymer chain is completely saturated and contains only 
carbon, oxygen, and fluorine. On a weight basis, a typical Krytox®
oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine.
DuPont™ Krytox® GPL 203 Lubricant
Krytox® GPL 203 grease is PTFE1
-thickened, contains no 
additives, and can be used on components that come in contact 
with chemicals. Typical applications include valves, instruments 
or bearings that come into contact with chemicals including 
alcohols, ammonia, solvents, steam, acids and bases, and 
oxygen systems including LOX2
 and GOX3
. Krytox® GPL 203 
grease is commonly used as a lubricant for seals and O-rings and 
is compatible with most types of seals.
Krytox® oils and greases are silicone-free. They do not contain 
any VOC4
 materials or chlorine and are not hazardous to 
the atmosphere or ozone layer. They are biologically and 
environmentally inert.
Typical Properties of DuPont™ Krytox® GPL 203
Anti-Corrosion Additive NO
Appearance White, creamy consistency
Estimated Useful Temperature Range, °C (°F) –60 to 154 (–76 to 310)
Base Oil Viscosity, cSt, 20 °C (68 °F) 
 40 °C (104 °F) 
 100 °C (212 °F) 
82
30
5
Oil Separation, % in weight after 30 hours, 99 °C (210 °F) 6
Maximum Oil Volatility, % in 22 hr , 66 °C (150 °F)
D2595, 121 °C (250 °F)
1
7
Dropping Point NA
Standard NLGl Grade 2
Specific Gravity, g/cm3
1.97
Food Contact Approval yes, NSF H-1
These values are typical properties and are not specifications.
1
 PTFE = polytetrafluoroethylene
2
 LOX = liquid oxygen
3
 GOX = gaseous oxygen
4
 VOC = volatile organic compounds