Za butyl rabara zolimba ndi zolimba ngati mphira woyera wolemera 0.92g/cm3. Ndiwopanda fungo, osasungunuka m'madzi, ndipo amasungunuka mu hexane ndi chloroform. Chogulitsacho chimakhalanso ndi mpweya wochepa, mpweya wabwino, komanso kukana bwino. Kukana kwa ozoni, kukana kwa mankhwala, kutchinjiriza kwa magetsi, kukana kusinthasintha, kukana kutentha kukalamba, kuyamwa kwamphamvu ndi zina.