Expanded Clay Geothermal Fill from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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