Section 06 Products of the chemical or allied 38 Miscellaneous chemical products 38 16 Refractory cements, mortars, concretes and similar compositions, nes 38 16 00 Refractory cements, mortars, concretes and similar compositions, nes 38 16 00 00 Refractory cements, mortars, concretes and similar compositions, nes Commodity Code Description 38 16 00 00 00 Refractory cements, mortars, concretes and similar compositions, nes