Section 05 Mineral products 27 Mineral fuels, mineral oils and products of their distillation; bituminous substances; mineral waxes 27 15 Bituminous mixtures based on natural asphalt,..., mineral tar or tar pitch bitume-backs) 27 15 00 Bituminous mixtures based on natural asphalt, on natural bitumen, on petroleum bitumen,. Commodity Code Description 27 15 00 00 Bituminous mixtures based on natural asphalt, on natural bitumen, on petroleum bitumen,.