Natural Cement Clinker Ground from Canada
Ground natural cement from argillaceous limestone kilns provides hydraulic setting like Roman concrete. Under HTS 2523.90.00.00 as other hydraulic cements, separate from synthetic Portland. Used in sustainable historic replication projects.
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
• Include kiln firing certificates showing <900°C temp distinguishing from Portland
• Bulk shipments require dust suppression declarations for port handling