Lub qhov rooj hluav taws yog siv rau qee qhov khoob lossis qhov rooj, uas tuaj yeem ua lub luag haujlwm zoo heev hauv kev tiv thaiv hluav taws. Lub qhov rooj hluav taws yog tsis muaj tshuaj lom, tsis muaj formaldehyde thiab lwm yam teeb meem, thiab muaj refractoriness siab (tuaj yeem tiv taus kub ntawm 1200 ° C).