Heat-Treated River Flint Shingle from Japan
Durable flint pebbles heat-treated for improved weathering resistance, used in concrete aggregates and road metalling. The thermal processing enhances bonding properties without altering basic classification. Covered by HTS 2517.10.00.15 including heat-treated shingle and flint.
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
• Document heat treatment temperature/time to prove doesn't constitute 'worked' processing under chapter notes
• Flint's high silica content requires proper dust control certification for handling
• Distinguish from decorative fire pit flint by specifying construction aggregate end use