Butyl Inner Tube Liner graphic


Ever since patenting butyl rubber in 1937, ExxonMobil has been at the forefront of air barrier innovations, never wavering from our commitment to advancing the rubber industry. Today, that leadership position enables you to benefit from advanced tire innerliner and pharmaceutical technologies as well as supply reliability to support your sustainable business growth.

Advanced air barrier technologies bring tire manufacturers the potential to introduce tires that weigh less and retain air better to improve fuel economy, handling and durability. For pharmaceutical manufacturers, our air barrier technologies result in stoppers and seals of the cleanest properties and highest quality.

Leadership means a long-term commitment to reliable supply and dependable product quality. Through our world-class halobutyl rubber production facilities, capacity expansions and product innovations, we demonstrate our commitment to meeting industry growth and demand.

Leadership is about continuous improvements to support trouble-free operations among manufacturers. No wonder customer satisfaction surveys rank ExxonMobil as a preferred butyl supplier with consistent quality and reliable supply.

  • Butyl rubber

    Exxon™ butyl rubber is the foundation of today’s butyl rubber technology. It is a copolymer of isobutylene and a small amount of isoprene. The primary properties are excellent air-barrier performance, good flex fatigue and vibration damping.

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  • Bromobutyl

    Exxon™ bromobutyl rubber is derived from halogenating butyl rubber with bromine in a continuous process. It is structurally similar to Exxon™ chlorobutyl rubber and produced through the same halogenation process.

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  • Chlorobutyl rubber

    Exxon™ chlorobutyl rubber is derived from halogenating butyl rubber with chlorine in a continuous process. It is structurally similar to Exxon bromobutyl rubber and produced through the same halogenation process.

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    Exxpro™ specialty elastomers, brominated isobutylene paramethyl-styrene terpolymers (BIMSM), provide a super-clean solution and cost-effective alternative to expensive coated stoppers. In the tire industry, Exxpro is used for high-performance bladders and envelopes.

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Industries and applications

Featured resources

View highlighted news, events, technical papers and case studies below. To see our full collection of resources, browse our Library.
  • 80 years of leadership in butyl technology

    Reference the list of ExxonMobil Chemical’s butyl rubber gradeslate, including grades and typical applications.

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  • ExxonMobil breaks ground in Singapore

    Just 10 months after celebrating completion of the major petrochemical expansion in Singapore, ExxonMobil is now ready to construct new halobutyl rubber and hydrogenated hydrocarbon resin production facilities on the Jurong Island site.

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  • Video: Air retention

    We keep the air in your tires and the good times rolling.

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  • Pioneers of innovation: The fathers of synthetic rubber

    Read how these pioneers have opened doors to further learning and exploration in their fields and beyond.

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  • Video: Make it a habit

    There's a routine that comes with car ownership. Checking your air pressure and refilling tires should be a habit that's as natural as putting on your seatbelt. ExxonMobil halobutyl tire innerliners help to keep the air in your tires.

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