Rubber — Butyl

It withstands most acids, alkalis, and polar solvents but is highly susceptible to petroleum-based oils, fuels, and hydrocarbon solvents. Common Applications

It has superior vibration-damping and shock-absorption properties, making it useful in automotive and industrial mounts. butyl rubber

, 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 withstands most acids, alkalis, and polar solvents

It typically remains functional in a wide range from -40°C to 120°C (-40°F to 248°F). It is highly valued for its exceptionally low

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.