TZ

monolithic refractories, namely, castable refractory cement, plastic refractories, non-metal ramming refractories, non-metal patching refractories, non-metal coating refractories, refractory mortars, and non-metal insulating castables; non-metal refractory ramming mixes composed of refractory aggregates; refractory castable mixes, not of metal; dry refractory mortars; and refractory shapes, not of metal