This elastomer is a copolymer of butadiene and acrylonitrile and is used for the majority of conventional fluid sealing applications.

Physical data:
- Working temperature range: -40°C to +120°C in oil / +90°C in water
- Tensile strength: up to 15 MPa
- Standard color: black

Advantages:
- Good resistance to mineral oil and grease
- Good resistance to water and radiator fluid
- High tear strength

Limitations:
- Poor resistance to high-alloyed hypoid oil
- Not resistant to automotive brake fluid (glycol based)
- Poor resistance to polar fluids (ketones, ethers, esters)
- Poor resistance to chlorinated hydrocarbons (carbon tetrachloride, trichlorethylene)
- Poor resistance to aromatic solvents

FLUORINATED RUBBER (FPM)

Mostly known under the trade name VITON® from Du Pont, TECHNOFLON® from Montedison and FLUOREL® from 3M. It has good chemical resistance and is recommended for high temperature applications.

Physical data:
- Working temperature range: -30°C to +200°C
- Tensile strength: up to 15 MPa
- Standard color: brown

Advantages:
- Excellent resistance to mineral oil and above all high-alloyed hypoid oils
- Excellent acid resistance
- Good resistance to aromatic and chlorinated hydrocarbons
- Excellent resistance to aging, ozone and weathering

Limitations:
- Limited cold flexibility
- Poor resistance to polar fluids (ketones, ethers, esters)

SILICONE RUBBER (SIL)

Also referred to as MVQ.

Physical data:
-Working temperature range: -60°C to +220°C
- Tensile strength: approx. 3-7 MPa
- Standard color: red

Advantages:
- Retains flexibility down to very low temperatures
- Withstands continuous heating at high temperatures without hardening
- Resistant to mineral oils and greases
- Excellent resistance to aging, weathering and ozone
- Good chemical resistance to alkalis

Limitations:
- Not recommended for use with hydrocarbons, such as petrols and paraffin, and lighter mineral oils
- Not resistant to hot water, acids and non-mineral automotive brake fluids
- Poor tensile and tear strength
- Poor wear resistance

CHLOROPRENE RUBBER (CR)

Mostly known under the trade name NEOPRENE® from Du Pont

Physical data:
- Working temperature range: -40°C to +80°C
- Tensile strength: up to 15 MPa

Advantages:
- Excellent resistance to aging, weathering, and ozone
- Moderate resistance to mineral oils and greases

Limitations:
- Tends to harden or stiffen at low temperatures
- Not resistant to non-mineral automotive brake fluids

*Viton® is a registered trademark of DuPont Dow Elastomers