IIR O-rings 70 Shore A

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 30 X 4 IIR70 Black O-ring Black30 mm x 4 mmIIR Butyl70 Shore ANee59 icon
O-Ring 270 X 5 IIR70 Black O-ring Black270 mm x 5 mmIIR Butyl70 Shore ANee55 icon
O-Ring 42 X 5 IIR70 Black O-ring Black42 mm x 5 mmIIR Butyl70 Shore ANee56 icon
O-Ring 18.72x2.62 IIR - 70 Shore A - Black - ses-1824 O-ring Black18.72 mm x 2.62 mmIIR Butyl70 Shore ANee60 icon
O-Ring 355 X 4 IIR70 Black O-ring Black355 mm x 4 mmIIR Butyl70 Shore ANee59 icon
O-Ring 208 X 4 IIR70 Black O-ring Black208 mm x 4 mmIIR Butyl70 Shore ANee60 icon
O-Ring 285 X 4 IIR70 Black O-ring Black285 mm x 4 mmIIR Butyl70 Shore ANee51 icon
O-Ring 14 X 1.78 IIR70 Black O-ring Black14 mm x 1.78 mmIIR Butyl70 Shore ANee54 icon
O-Ring 5 X 1.5 IIR70 Black O-ring Black5 mm x 1.5 mmIIR Butyl70 Shore ANee51 icon
O-Ring 80 X 4 IIR70 Black O-ring Black80 mm x 4 mmIIR Butyl70 Shore ANee55 icon
O-Ring 220 X 7 IIR70 Black O-ring Black220 mm x 7 mmIIR Butyl70 Shore ANee59 icon
O-Ring 6 X 1.5 IIR70 Black O-ring Black6 mm x 1.5 mmIIR Butyl70 Shore ANee59 icon
O-Ring 12 X 2 IIR70 Black O-ring Black12 mm x 2 mmIIR Butyl70 Shore ANee60 icon
O-Ring 629.3 X 5.7 IIR70 Black O-ring Black629.3 mm x 5.7 mmIIR Butyl70 Shore ANee59 icon
O-Ring 72.62x3.53 IIR - 70 Shore A - Black - ses-500009 O-ring Black72.62 mm x 3.53 mmIIR Butyl70 Shore ANee54 icon
O-Ring 315 X 5 IIR70 Black O-ring Black315 mm x 5 mmIIR Butyl70 Shore ANee54 icon
O-Ring 270 X 6 IIR70 Black O-ring Black270 mm x 6 mmIIR Butyl70 Shore ANee60 icon
Placeholder O-ring Black75 mm x 4 mmIIR Butyl70 Shore ANee51 icon
O-Ring 1080 X 10 IIR70 Black O-ring Black1080 mm x 10 mmIIR Butyl70 Shore ANee60 icon
O-Ring 56.87 X 1.78 IIR70 Black O-ring Black56.87 mm x 1.78 mmIIR Butyl70 Shore ANee59 icon
O-Ring 8 X 2 IIR70 Black O-ring Black82 mm x 2 mmIIR Butyl70 Shore ANee50 icon
O-Ring 120 X 5 IIR70 Black O-ring Black120 mm x 5 mmIIR Butyl70 Shore ANee60 icon
O-Ring 59.69 X 5.33 IIR70 Black O-ring Black59.69 mm x 5.33 mmIIR Butyl70 Shore ANee52 icon
O-Ring 51x1.5 IIR - 70 Shore A - Black - ses-281022 O-ring Black51 mm x 1.5 mmIIR Butyl70 Shore ANee59 icon
O-Ring 85.09 X 5.33 IIR70 Black O-ring Black85.09 mm x 5.33 mmIIR Butyl70 Shore ANee57 icon
O-Ring 48 X 3 IIR70 Black O-ring Black48 mm x 3 mmIIR Butyl70 Shore ANee56 icon
O-Ring 175 X 8 IIR70 Black O-ring Black175 mm x 8 mmIIR Butyl70 Shore ANee60 icon
O-Ring 80 X 5 IIR70 Black O-ring Black80 mm x 5 mmIIR Butyl70 Shore ANee53 icon
O-Ring 7.66x1.78 IIR - 70 Shore A - Black - ses-320274 O-ring Black7.66 mm x 1.78 mmIIR Butyl70 Shore ANee59 icon
O-Ring 3.5 X 2 IIR70 Black O-ring Black3.5 mm x 2 mmIIR Butyl70 Shore ANee57 icon
O-Ring 50.17 X 5.33 IIR70 Black O-ring Black50.17 mm x 5.33 mmIIR Butyl70 Shore ANee57 icon
O-Ring 56 X 4 IIR70 Black O-ring Black56 mm x 4 mmIIR Butyl70 Shore ANee53 icon
O-Ring 209.14 X 3.53 IIR70 Black O-ring Black209.14 mm x 3.53 mmIIR Butyl70 Shore ANee52 icon
O-Ring 189.87 X 5.33 IIR70 Black O-ring Black189.87 mm x 5.33 mmIIR Butyl70 Shore ANee53 icon
O-Ring 54 X 4 IIR70 Black O-ring Black54 mm x 4 mmIIR Butyl70 Shore ANee52 icon
Placeholder O-ring Black72.62 mm x 3.53 mmIIR Butyl70 Shore ANee58 icon
O-Ring 750 X 7 IIR70 Black O-ring Black750 mm x 7 mmIIR Butyl70 Shore ANee50 icon
O-Ring 62 X 4 IIR70 Black O-ring Black62 mm x 4 mmIIR Butyl70 Shore ANee56 icon
O-Ring 8.5 X 3 IIR70 Black O-ring Black8.5 mm x 3 mmIIR Butyl70 Shore ANee56 icon
O-Ring 40.95x2.62 IIR - 70 Shore A - Black - ses-304796 O-ring Black40.95 mm x 2.62 mmIIR Butyl70 Shore ANee54 icon

Butyl rubber, sometimes referred to simply as butyl, is a synthetic rubber, a copolymer of isobutylene and isoprene. The abbreviation IIR stands for isobutylene isoprene rubber.

Polyisobutene, also known as PIB or polyisobutene, is the homopolymer of isobutylene, or 2-methyl-1-propene, on which butyl rubber is based.

Butyl rubber is produced by polymerization of approximately 98% isobutylene with approximately 2% isoprene. Polyisobutylene is structurally similar to polypropylene, but it has two methyl groups that are substituted on each other carbon atom instead of one. Polyisobutylene is a colorless to slightly yellow visco-elastic material. It is generally odorless and tasteless, although it may have a slight characteristic odor.

After isobutylene and polyisobutylene were already discovered, it was later developed into butyl rubber in 1937 by researchers William J Sparks and Robert M Thomas in the Standard Oil of New Jersey laboratory in Linden, NJ. Today, most of the worldwide supply of butyl rubber is produced by two companies. Exxonmobil and Polymer Corporation.

In the 1950s and 1960s, halogenated butyl rubber (halobutyl) was developed, in the chlorinated (chlorobutyl) and brominated (bromobutyl) variants, with considerably higher curing speeds and covulcanization with other rubbers such as natural rubber and styrene-butadiene rubber. Halobutyl is today the most important material for the inner linings of tubeless tires.

Benefits IIR:
• Excellent low gas permeability
• Good flexibility
• Good electrical properties
• Good chemical resistance
• Good moisture resistance
• Good wear resistance
• It can function for a longer time at -50 degrees to +120 degrees
• It has good ozone and aging resistance
• Excellent air impermeability
• Good flex properties
• Is known for its high degree of gas tightness
• Good weather resistance
• Resistant to acids and alkalis oxidation sunlight

Downsides of IIR:
 - Cannot be used with mineral oils

On this page we offer our range of 70 Shore A O-Rings. Search for your specific O ring by using the filters on the left of the page or take your time and browse our wide range of our products. When you can not find the product you are looking for in our 70 Shore A made from IIR, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.