Heat-Treated Pumice Gravel from United States
Heat-treated pumice gravel is natural pumice stone that has been thermally processed to enhance durability for use in concrete aggregates and water filtration. While Chapter 25 generally excludes heat-treated products, the heading for pumice stone specifically allows heat treatment. This product retains its natural abrasive properties and falls under this tariff item.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm that the heat treatment does not alter the pumice's structure beyond what is permitted for this heading
• Provide technical specifications to CBSA showing the product remains a natural abrasive
• Verify the end-use to ensure it is not classifiable elsewhere, such as in construction materials