6806.20.00.00/Expanded Clay Geothermal Fill/Japan

Expanded Clay Geothermal Fill from Japan

Expanded clay aggregate used as backfill around geothermal heat exchanger loops for thermal conductivity. HTS 6806.20.00.00 classification for expanded mineral materials in energy applications. Prevents loop settling.

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%

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Import Tips

• Include thermal conductivity specs (1.5-2.0 W/mK typical)

• Declare borehole backfill end-use for customs context

• High moisture tolerance certification for underground applications