Mpempe akwụkwọ rubber Butyl bụ rọba dị elu nke nwere oke okpomọkụ. Ọ nwere ahụkebe ala gas na mmiri permeability.Butyl roba mpempe akwụkwọ na-eji na ọtụtụ ndị ọzọ ngwa, ịbụ highlyimpermeable ka gas, ozone, ultra violet ìhè, chemicals na weather-ering.
