Foamed Slag Aggregate from Mexico
Foamed slag is produced by expanding blast furnace slag with air or steam for use as lightweight concrete aggregate. It matches HTS 6806.20.00.00 as a similar expanded mineral material for construction insulation and sound absorption. Provides thermal properties in building fills.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit industrial process documentation showing slag foaming method to validate HTS classification
• Ensure no metallic content exceeds trace levels to avoid Chapter 72 steel product reclassification
• Declare particle size distribution for verifying use as expanded aggregate