Diatomite Thermal Insulation Block from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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