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Butyl  

Exxon™ butyl rubber provides critical product performance attributes to enable the automotive and pharmaceutical industries to deliver key customer benefits:

  • Tires made with halobutyl rubber innerliners have improved air retention, which helps to maintain proper tire pressure. Better air retention brings consistent performance over time — improving energy efficiency, tire life, and safety
  • Pharmaceutical stoppers and seals, made with Exxon™ butyl rubber, provide securely delivered product purity

    You can rely on consistent product quality and supply from a global network of world-class halobutyl rubber production facilities. 
  • ExxonMobil Chemical Butyl Rubber Plant

    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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  • ExxonMobil branded Tire

    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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  • Rack of tires made with Chlorobutyl

    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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  • BIMSM Pharma Stoppers

    Specialty elastomer for pharmaceuticals

    Exxpro™ specialty elastomers, brominated isobutylene paramethylstyrene terpolymers (BIMSM), provide a super-clean solution and cost-effective alternative to expensive coated stoppers.

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  • exxpro blue car arch

    Boost your tire performance

    Innerliners made with Exxpro™ specialty elastomer keep air in the tires longer and boost vehicle performance.

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ev performance hidden factor
fuel efficiency in the beginning

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.
  • ExxonMobil Chemical Library icon

    Gradeslate: 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 Chemical play button icon

    Video: Proper air retention can make all the difference

    It’s the everyday moments that can easily go from simple to complex, good to bad, or economical to expensive – simply due to tire inflation. ExxonMobil halobutyl tire innerliners help to keep the air in your tires.

    Watch the video
  • ExxonMobil Chemical share button icon

    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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