Pumice for Foundry Core Sand Additive from United States
Pumice for foundry core sand additive is fine pumice added to foundry core sands to improve permeability and reduce defects. It is classified under tariff item 2513.10.00 as pumice stone, a natural abrasive, when imported as a separate additive for mixing by the foundry.
Duty Rate — United States → Canada
0%
Import Tips
• Import the pumice separately from the sand mix to maintain classification under Chapter 25
• Confirm the pumice is not chemically treated or coated with resins
• Provide technical data showing the pumice's role as a mechanical additive, not a chemical binder