Pumice for Foundry Core Sand Additive from Mexico
Fine pumice added to foundry core sands improving permeability and reducing defects. Classified under HTS 2513.10.0080 as pumice stone natural abrasive. Enhances collapsibility for easier shakeout.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• AFS Grain Fineness Number testing for foundry sand specifications
• Thermal analysis for core baking performance
• Avoid organic contaminants affecting binder curing