Explanatory notes
… usually contain fillers such as sand, slag, chalk, plaster, cement, talc, sulphur, asbestos fibre, wood fibre, sawdust, … Asphalt, bitumen, pitch, etc., in blocks of the kind remelted before use are excluded ( Chapter 27 ) whether or … of cast iron or steel) coated with asphalt, bitumen, etc., remain classified as metal articles. The heading further …