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All types of sealant material - GUMAPLAST VP

The nitrile group (NBR)


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

Working temperature range is: -40°C to +100°C

Advantages
  • Good swelling resistance in both mineral oils and greases as well as in water and cooler fluid.
Limitations
  • Poor resistance to high-alloyed hypoid oil,
  • Poor ozone resistance,
  • Not resistant to automotive brake fluid (glycol-ether based),
  • Poor resistance to polar fluids (ketones, ethers, esters),
  • Poor resistance to chlorinated hydrocarbons (carbon tetrachloride, trichloroethylene),
  • Poor resistance to aromatic hydro-carbons.

Fluor elastomer FPM


Mainly known by the trade name VITON® from Du Pont, TECNOFLON® from Solvay and FLUOREL® from 3M. It has good chemical resistance and is recommended for high temperature applications.

Working temperature range is: -30°C to +200°C
Standard colour: Brown

Advantages
  • Excellent resistance to mineral oils, greases (also with most additives) and above all to 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 known as MVQ or VMQ, it is an elastomer based on methyl vinyl silicone rubber. Compared to other rubbers, MVK has low mechanical properties, so it is primarily used for the production of static parts.

Working temperature range is: -50°C to +200°C
Standard colour: Red

Advantages
  • Keeps flexibility down to very low temperatures,
  • Withstands constant heating at high temperatures without hardening,
  • Resistant to mineral oils and greases,
  • Excellent resistance to aging, weathering and ozone.
Limitations
  • Not recommended for use with aliphatic as well as aromatic hydrocarbons such as gasoline and paraffin, and lighter mineral oils or steam over 3.5 bars,
  • Not resistant to hot water (100°C), acids and non-mineral automotive brake fluids,
  • Poor tensile and tear resistance,
  • Poor wear resistance.

Chlorobutadiene rubber (CR)


Diene based elastomer

Working temperature range is: -40°C to +100°C
Standard colour: Black

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.

Acrylate rubber (ACM)


Polyacrylic elastomers, also called ACM rubbers, are synthetic rubbers composed of acrylic monomers.

Working temperature range is: -10°C to +150°C
Standard colour: Black

Advantages
  • Good resistance to oils and fuels,
  • Good resistance to ozone and weathering.
Limitations
  • Not resistant to water, water solutions and steam,
  • Poor resistance to polar fluids (ketones, ethers, esters),
  • Poor resistance chlorinated hydrocarbons (carbon tetrachloride, trichloroethylene),
  • Poor resistance to aromatic hydrocarbons,
  • Limited cold flexibility,
  • Poor wear resistance.

Ethylene Propylene Diene Rubber (EPDM)


Ethylene propylene monomer (EPDM) is a copolymer of ethylene, propylene and a small amount of non-conjugated diene monomers. These terpolymers can be vulcanized by traditional techniques.

Working temperature range is: -45°C to +150°C
Standard colour: Black

Advantages
  • Excellent resistance to aging, weathering and ozone,
  • Good resistance to water and steam,
  • Good resistance to automotive brake fluid (glycol-ether based),
  • Good resistance to polar fluids.
Limitations
  • Poor resistance to mineral oils and greases.