, also known as isobutylene-isoprene rubber ( IIR ), is a synthetic elastomer produced by copolymerizing isobutylene with a small amount of isoprene. It is highly valued for its exceptionally low gas and moisture permeability , making it the standard material for applications requiring airtight seals. Key Characteristics
It offers excellent resistance to ozone, weathering, UV radiation, and heat aging. butyl rubber
It typically remains functional in a wide range from -40°C to 120°C (-40°F to 248°F). , also known as isobutylene-isoprene rubber ( IIR
It has one of the lowest gas transmission rates among all rubbers, which is why it's used extensively in tire inner liners and tubes. butyl rubber