Raw Fire-Clay Lumps from Canada
Raw fire-clay in lump form is unprocessed high-alumina clay mined for refractory applications like stove linings. Classified under HTS 2508.30.00.00 as fire-clay, distinct from expanded clays or other minerals. It provides the base material for firebricks and pottery kilns.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide mining certificates proving natural fire-clay origin to prevent misclassification as processed earths
• Ensure no prior calcination or shaping, as worked forms may classify under Chapter 68
• Test for moisture content; excessive drying could imply processing shifting to chamotte (still 2508 but note differences)