Cov khoom siv roj hmab butyl yog cov roj hmab dawb zoo li cov khoom siv nrog qhov ntom ntawm 0.92g\ / cm3. Nws yog ntxhiab tsw, insoluble hauv dej, thiab soluble hauv hexane thiab chloroform. Cov khoom kuj muaj cua permeability tsawg, zoo airtightness, thiab zoo kuj. Ozone tsis kam, tshuaj tiv thaiv, hluav taws xob rwb thaiv tsev, yooj ywm tsis kam, tshav kub laus kuj, lub zog nqus thiab lwm yam ntxwv.