HNBR

Hydrogenated Nitrile (HNBR)

HNBR is created by partially or fully hydrogenating NBR this improves the ozone, heat and aging resistance of the elastomer and improves overall mechanical properties. HNBR, like Nitrile, increasing the acrylonitrile content increase resistance to heat and petroleum based oils and fuels, but decreases the low temperature performance.

Temperature Range

Low -30° C
High 149° C

Hardness Range

40 to 90 Shore A

EPDM Rubber

EPDM Rubber

EPDM compounds are used frequently to seal in brake systems, and for sealing hot water and steam. EPDM compounds have good resistance to mild acids, detergents, alkalis, silicone oils and greases, ketones, and alcohols. They are not recommended for applications with petroleum oils, mineral oil, di-ester lubricants, or fuel exposure. EPDM has excellent ozone and chemical resistance properties and is compatible with many polar fluids.

Temperature Range

Low -51° C
High 149° C

Hardness Range

40 to 90 Shore A

Different O Ring Compounds

Silicone Rubber

Silicone is a semi-organic elastomer with outstanding resistance to extremes of temperature with corresponding resistance to compression set and retention of flexibility. Silicone elastomers provide excellent resistance to ozone, oxygen, and moisture. Low physical strength and abrasion resistance combined with high friction properties limit silicone to static seal applications. Silicone utilizes a flexible siloxane backbone rather than a carbon backbone like many other elastomers and has very low glass transition temperatures.

Temperature Range

Low -59° C
High 232° C

Hardness Range

10 to 85 Shore A

Low Temperature O Ring

Acrylontitrile – Butadiene Rubber Nitrile (NBR)

Nitrile is the most widely used elastomer in the seal industry due to its excellent resistance to petroleum products and its ability to be compounded for service over a temperature range of -40°C to 125°C. Nitrile provides excellent compression set, tear, and abrasion resistance. The major limiting properties of nitrile are its poor ozone and weather resistance and moderate heat resistance, but in many application these are not limiting factors.

Temperature Range

Low -40° C
High 125° C

Hardness Range

30A to 70D

Neoprene O Rings

Chloroprene Rubber / Neoprene

Chloroprene Rubber is moderately resistant to both petroleum oils and weather (ozone, UV, oxygen). This qualifies Chloroprene uniquely for certain sealing applications where many other materials would not be satisfactory. Chloroprene has relatively low compression set, good resilience and abrasion, and is flex cracking resistant. Chloroprene has excellent adhesion qualities to metals for rubber to metal bonding applications. It is used extensively for sealing refrigeration fluids due to its excellence resistance to Freon and ammonia.

Temperature Range

Low -40° C
High 121° C

Hardness Range

15 to 95 Shore A

Styrene-Butadiene (SBR)

Styrene-Butadiene (SBR)

Styrene-Butadiene (SBR) is a copolymer of styrene and butadiene. SBR compounds have properties similar to those of natural rubber. SBRs primary custom molded application is the use in hydraulic brakes system seals and diaphragms, with the major of the industry usage coming from the Tire Industry. SBR features excellent resistance to brake fluids, and good water resistance.

Temperature Range

Low -46° C
High 100° C

Hardness Range

40 A to 60 D

Natural

Natural Rubber (NR)

Natural rubber is a product coagulated from the latex of the rubber tree, hevea brasiliensis. Natural rubber features low compression set, high tensile strength, resilience, abrasion and tear resistance, good friction characteristics, excellent bonding capabilities to metal substrate, and good vibration dampening characteristics.

Temperature Range

Low -54° C
High 72° C

Hardness Range

30 to 90 Shore A

Fluorosilicone-1

Fluorosilicone(FVMQ)

Fluorosilicones combine most of the attributes of silicone with resistance to petroleum oils and hydrocarbon fuels.

Low physical strength and abrasion resistance combined with high friction limit fluorosilicone to static seals.

FFKM

Perfluoroelastomer(FFKM)

Perfluoroelastomers show ultimate performance among all elastomers. They are resistant to nearly every chemical class with some grades offering heat resistance over 300°C, this makes FFKM the material of choice for high demanding sealing applications.

Ismat’s specialty compounds deliver an extreme performance range that make them suitable for use in critical applications like semi-conducter chip manufacturing, jet engines, chemical processing equipment and Oil & Gas which require a wide range of extreme performance.