Bentonite Clay Swellable Grade from Canada
Sodium montmorillonite bentonite clay with high swelling capacity, used in drilling muds and sealants. HTS 2508.40.0150 covers this as 'other clays', unexpanded and suitable for industrial applications like oilfield services.
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
• Certify montmorillonite content (>70%) and cation exchange capacity for proper 'other clays' declaration
• Declare intended end-use (e.g
• drilling) but note classification is material-based, not use-based