Ubuhlalu obuntantayo bungamabhola angenalutho angantanta phezu kwamanzi.Zimhlophe ngokumpunga, zincane futhi ziyize, futhi zilula ngesisindo.Ukuminyana ngobuningi kungu-720kg/m3 (sindayo), 418.8kg/m3 (ukukhanya), futhi usayizi wezinhlayiyana cishe u-0.1 mm, indawo engaphezulu ivaliwe futhi ibushelelezi, i-thermal conductivity incane, futhi i-refractoriness ingu-≥1610℃.Ukwakheka kwamakhemikhali kobuhlalu obuntantayo ikakhulukazi i-silicon dioxide ne-aluminium oxide.Inezici eziningi ezifana nezinhlayiya ezinhle, okungenalutho, isisindo esilula, amandla aphezulu, ukumelana nokugqoka, ukumelana nokushisa okuphezulu, ukufakwa kwe-thermal, ukwahlukanisa kanye ne-flame retardant.Isetshenziswa kabanzi Kweyodwa yezinto zokusetshenziswa embonini ye-refractory.