Diatomite Thermal Insulation Block from Mexico
High-porosity thermal insulation block from diatomaceous earth for ovens and high-heat enclosures. HTS 6901.00.00.00 specifically for blocks of siliceous fossil meals.
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
• Include thermal conductivity data (<0.15 W/mK typical for diatomite)
• Certify no organic binders exceeding Chapter 69 curing exclusions
• Invoice as 'blocks' not 'boards' to match terminology