Amabhulokhi omkhawulo we-Urethane adlala indima ebalulekile emkhakheni wamathuluzi omshini, ikakhulukazi emkhakheni wemishini yokukhiqiza nokucubungula. Lawa mabhulokhi aklanyelwe ukukhawulela ukunyakaza kwezingxenye zemishini, kuqinisekisa ukunemba nokunemba emisebenzini ehlukahlukene yokusebenza. Umsebenzi owodwa obalulekile wamabhulokhi omkhawulo we-urethane ukuhlinzeka ngesithiyo somzimba esivimbela ukunyakaza ngokweqile noma ngadla