Import duty on Clays; (not including expanded clays of heading no. 6806), andalusite kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earth (HS 2508)

Heading 2508 covers 6 tariff lines in LoadLoom's table; 6 of them clear duty-free under USMCA for goods made in Canada, the US or Mexico. Published US and Canadian rates below, verified October 2026. Pick the line that matches your goods for the worked example and border steps.

HS code	Goods	US duty	Canada duty	USMCA
2508.10	Clays (excluding expanded clays of heading no. 6806); bentonite, whether or not calcined	Free	Free	Free with certificate
2508.30	Clays (excluding expanded clays of heading no. 6806); fireclay, whether or not calcined	Free	Free	Free with certificate
2508.40	Clays (excluding expanded clays of heading no. 6806); n.e.c. in heading no. 2508, whether or not calcined	Free	Free	Free with certificate
2508.50	Clays (excluding expanded clays of heading no. 6806); andalusite, kyanite and sillimanite, whether or not calcined	Free	Free	Free with certificate
2508.60	Clays (excluding expanded clays of heading no. 6806); mullite	Free	Free	Free with certificate
2508.70	Clays (excluding expanded clays of heading no. 6806); chamotte or dinas earths	Free	Free	Free with certificate

This page is a free reference for shippers, not a customs ruling. Final classification and duty are determined by the licensed customs broker at entry, and government amounts are always billed at actual. Rates change with each tariff edition and trade action.

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