Section 06 Products of the chemical or allied 38 Miscellaneous chemical products 38 16 Refractory cements, mortars, concretes and similar compositions, other than products of heading 3801 38 16 00 --- Other 38 16 00 90 --- Other Commodity Code Description 38 16 00 90 100 - - - Concrete additive 38 16 00 90 900 - - - Other