Mineral Wool R-19 Wall Insulation Batts 23-inch from Japan
R-19 rated mineral wool batts, 23 inches wide (58.4 cm but friction-fit exceeds 61 cm effective), for standard 2x6 wall cavities in energy-efficient homes. HTS 6806.10.00.40 covers these uncompressed slag/rock wool batts for heat-insulating applications, excluding coated textiles or chapter 69 ceramics. High-density fibers resist settling over time.
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
• Submit ASTM C665 compliance certificates proving thermal performance and corrosion resistance for favorable duty treatment
• Declare density (e.g
• 2.5 pcf) accurately; lightweight batts risk scrutiny as 'expanded' under 6806.20