Chophimba chowongoka chosamva kuvala chokhazikika chimapangidwa ndi refractory aggregate, refractory powder.zomangira ndi zina zowonjezera.
Light-weight refractory insulation castable imapangidwa ndi mawonekedwe apamwamba kwambiri opepuka, ufa, admixture ndi binder.
Njerwa zopepuka za mullite zimakhala ndi porosity yayikulu, yomwe imatha kupulumutsa kutentha kwambiri ndipo imachepetsa mtengo wamafuta.
The refractory mortar ndi mtundu watsopano wa zinthu zomangira organic, zopangidwa ndi ufa womwe uli wamtundu womwewo monga njerwa yoyikidwa, inorganic binder ndi admixture.