NB (NER,Nitrile Rubber)
EP(EP,EPDM,Ethylene Propylene Rubber)
SE (Silicone Rubber)
KF (FKM,Fluoro Rubber,Viton)
HN (Hydrogenated Nitrile)
AC (ACM,Polyacrylate Rubber)
NR (Narural Rubber)
PU (Polyuethane Rubber)
CR (Polychloroprene,Neoprene)
  NB (NER,Nitrile Rubber)
  Temperature scope for application: -54℃to 135℃. Presently it is widely used for oil seal and O-ring.
With characteristics of good oil-resistant, waterproof, solvent-resistant, anti-high pressure oil. Has good quality of compressing, extensile, and wear-resistant. Not suitably used for polar solvents, such as: ketones, ozone, nitrohydrocarbons, MEK, and Chloroform.

Features:
good resistance against carbon-hydrogen fuel oil of petrochemical products, but low temperature property can be weakened.
   
EP(EP,EPDM,Ethylene Propylene Rubber)
  Temperature scope for application: -54℃to 150℃. With excellent weather-resistance, ozone-resistance, and waterproof, chemicals-resistance, it can be applied to alcohols and ketones, and is durable against steaming under high temperature as well as has good impermeability. But, not recommended for foods purpose or exposed under aromatic hydrocarbons.

Features:
Heat-resistant, aging-resistant, ozone-resistant and excellent stability, but not recommended for oils
resulting in swelling of finished-products.
   
SE (Silicone Rubber)
  Temperature scope for application: -73℃to 230℃. Is available to use for environment of high/low
temperature. After formula is regulated, the tensile resistance can reach up to 1500 PSI, and its rupture resistance can reach to 88LBS. It has good elasticity and compression, and good resistance against neutral solution with excellent heat and cold resistance. Has the best corrosive-resistance against ozone and oxide, and also has remarkable property of electric isolation with good ventilation. But not recommended for most of the concentrated solvent, oils, concentrated acids, and diluted sodium hydroxide.

Features:
Has excellent heat, cold, ozone, and aging resistance. Good electric isolation property, strong tensile more than ordinary rubber, but has less oil-resistance.
   
KF (FKM,Fluoro Rubber,Viton)
  Currently, the earliest presentation brand is “Viton” of DuPont Co. in the market, and its temperature scope for application: -20℃to 260℃. Even can low down to -40℃, but the price is more expansive.
Heat-resistant up to 250℃, and has resistant ability against most of the oils and solvents, especially for all acids, aromatic hydrocarbons, aliphatic hydrocarbons, plant or animal oils, but not recommended to use for ketones, low
molecular esters and nitro-mixture.
Features:
excellent both weather-resistance and ozone-resistance, but has weak cold-resistance.
   
HN (Hydrogenated Nitrile)
  Temperature scope for application: -25℃to 150℃. Widely used for automobile engine systems. Currently is also widely used for R-134A refrigerant system. Has better wear-resistance than NBR, and is equipped with excellent corrosion-resistance, tension-resistance, rupture-resistance, and compression-resistance. It has good resistant property under ozone, sunshine, and other atmosphere conditions. Generally, it is suitably used for laundry and dishes cleaner, and not recommended to use for alcohols, esters or aromatic hydrocarbons solvent.

Features:

Higher weather-resistance and temperature-resistance more than NBR.
   
AC (ACM,Polyacrylate Rubber)
  Temperature scope for application: -28℃to 170℃. Widely used for automobile transmission and power system. Suitably used for automobile transmission system and power steering, and not suitably used for hot water and brake oil. As it has no resistance against low temperature, is not available for phosphate.

Features:

Excellent resistance against petrochemicals, high temperature, and weather.
But it has weak machinery density compression and waterproof if compared
to general oil-resistant rubber.
   
NR (Narural Rubber)
  Features:

Has excellent rupture resistance and extendibility, but has no ideal property of heat-resistance and weather-resistance. In the air, it is easily aging, and becomes sticking if having encountered with heat. It is easily swelled and soluble in the mineral oils or gasoline, anti-base but not anti-acid.
   
PU (Polyuethane Rubber)
  Temperature scope for application: -45℃to 90℃. Has wear-resistance, high-pressure-resistance, but not high-temperature-resistance.

Features:

Has excellent resistance against aging, ozone, and oils, and is widely applied for industrial
parts, especially for high voltage loading. But its waterproof property is not ideal, be
careful to select the parts for use in case of need.
   
CR (Polychloroprene,Neoprene)
  Temperature scope for application: -54℃to 150℃. Excellent elasticity and compression deformation,
there is no sulfur in the formula, so it is easy to have resistant property against plant and animal oils. Its physical property won't be affected by neutral chemicals, esters, oils, and various oil solvents, and has incombustible quality, not recommended to use for strong acid, Nitrohydrocarbons, Esters, Chloroform, and Ketones.

Features:

Excellent resistance against heat, aging, weather, and ozone.