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| Compound |
Description |
Common Application |
Buna-N
(Nitrile/NBR) |
Standards
for most applications: Good resistance to petroleum, hydrocarbons, fuels.
Widely used with most oils, hydraulic fluids, and alcohol. Poor resistance to
sunlight, weathering and ozone. The least expensive but most readily available
material. |
Petroleum
Oil Seals
Hydraulic Fluid Seals
Water/Greases
Transmission fluid Seals |
Fluorocarbon
(FKM/Viton®) |
Stability
and compatibility with a wide range of fluid and chemical types. Excellent
temperature and chemical resistance. Excellent mechanical and physical
properties. Low compression set and low gas permeability. Not for use with
Acetone, Skydrol, or ethyl Acetate. |
Vacuum Seals
Acids/ Fuels
High heat Chemicals/Solvent |
Silicone
(SIL) |
Compatible
with a variety of fluids, air oxygen, ozone, etc. Broad temperature range.
Odorless/non-toxic. Resistance to sun and ozone. Fungus resistance. Poor
tear and abrasion strength. Poor resistance to oils. |
Dry heat
Alcohol/Oxygen Electrical/Medical
Low
temperature
|
Ethylene
Propylene
(EPDM) |
For
hot water, steam, alcohols, acids, alkalis, keytones, phosphate esters,
brake fluids, drive belts. Resistance to sunlight, weathering and ozone.
Poor resistance to petroleum oils and fuel. Good heat and compression set
resistance. |
Steam/Hot
Water
Hydraulic/Skydrol
Auto brake
Alcohol/Greases |
Neoprene
(Chloroprene/
CR) |
Generally
used for refrigeration, freon gases, carbon dioxide gases, chlorine,
ozone, sunlight exposure and drive belts. Good resistance to petroleum
oils. Low compression set and good abrasion strength. Good resistance to
weathering, sunlight and ozone |
Refrigeration
Seals
Freon/Air Condition
Engine coolants
|
Polyurethane
(Urethane/PU) |
Highly
resistant to oil swell, ozone, oxidation and abrasion. Highly resilient
and having a high tensile strength and elongation properties. An excellent
choice for hydraulic seals using petroleum based oils. |
Hydraulic
seals in oil such as u-cups, o-rings,
wipers. |
Highly
Saturated
Nitrile
(HSN/HNBR) |
Excellent
abrasion resistance, compression set, tensile and tear properties. A step
above standard NBR in that it exhibits resistance to ozone, sunlight and
other atmospheric conditions. Vastly improved resistant to heat aging. |
For
various petroleum fluids. Hydraulic seals such as u-cups, vee packings,
wipers, back-up rings. |
Fluorosilocone
(FS) |
Recommended
for extreme temperature applications, petroleum oils, fuels and
lubricants, synthetic ester and diester lubricants. Wide range of fluid
and chemical resistance. Large temperature range. |
Aircraft
fuel systems
Jet fuel/Gasoline
Petroleum oils
Synthetic
jet oil
|
We still have other material
for your need:
Natural Rubber: exceptional elastic qualities and have good resistance to
water and acids.
Styrene Butadiene Rubbers (SBR): Synthetic substitutes for natural rubber
Isoprene-Isobutylene Rubber (Butyl): Has excellent resistance to aging, heat,
sunlight and ozone.
Fluoro-Silicone Rubber: High and low temperature stability, exceptional
release from sticking, resistance to aging, ozone and sunlight, good dielectrics
and outstanding water repellency.
Hypalon®: High ozone and corona resistance, heat resistance and good color
stability.
Polyacrylate: Good resistance to mineral oils, hypoid gear oils,
additives, greases, aging and fliex cracking.
*Viton® and Hyperlon® are
registered trademark of DuPont.
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