Semento(Portland cement, magnesium chloride o inorganic high temperature binder, atbp.), pinagsama-samang (pinalawak na vermiculite, pinalawak na perlite, aluminum silicate fiber, mineral wool, rock wool, atbp.), mga tulong sa kemikal (modifier, hardener, water-repellent, atbp. .), tubig.Portland cement, magnesium chloride cement at inorganic binder para saistraktura ng bakal sunog lumalaban patong base materyales.Ang mga inorganic na binder na karaniwang ginagamit ay kinabibilangan ng alkali metal silicate at phosphates, atbp.