I-refractory refractory eqinile engagugi yenziwa nge-refractory aggregate, impushana ephikisayo.ama-binders nezinye izithasiselo.
I-light-weight refractory insulation incastable ikhiqizwa ngekhwalithi ephezulu yesisindo sokukhanya, impushana, i-admixture kanye ne-binder.