Insulating Ceramic Filler Bricks from Japan
Low-density ceramic bricks with insulating properties used as fillers in composite building panels. Fired from lightweight clay aggregates at >800°C, classified in HTS 6904.90 as other ceramic support or filler tiles.
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
• Explicitly state non-electrical use to avoid Chapter 85 exclusion
• Thermal conductivity tests aid in proving building insulation intent
• Avoid bulk import with refractories to prevent averaging issues