Iyo lightweight mullite zvidhinha ine yakakwirira porosity, iyo inogona kuchengetedza kupisa kwakawanda uye saka inoderedza mutengo wemafuta.
Iyo refractory mortar imhando nyowani ye inorganic binding material, yakagadzirwa nehupfu inova yemhando yakafanana neyakaiswa zvidhinha, inorganic binder uye admixture.