6902.90.50.10/Insulating Clay Refractory Blocks/Mexico

Insulating Clay Refractory Blocks from Mexico

Lightweight clay refractory blocks with insulating properties for boiler and incinerator construction, fired from shaped clay mixtures. HTS 6902.90.50.10 covers these as clay-based refractory blocks other than siliceous types. They minimize heat loss in high-temperature applications.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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Import Tips

• Include thermal conductivity test results (<0.5 W/mK typical) to substantiate refractory insulation claims

• Ensure packing lists specify 'fired clay refractory' to avoid scrutiny as unfinished goods

• Check for chrome content; if >10%, may require additional hazardous material declarations

Insulating Clay Refractory Blocks from Mexico — Import Duty Rate | HTS 6902.90.50.10