Rockwool Comfortbatt Fire-Resistant Insulation from Japan
Stone wool batts (classified as glass wool equivalent) with R-23 rating for stone wool fire-rated walls, offering superior sound absorption. HTS 7019.80.10 applies as it meets fused silica/mineral wool insulation criteria in Chapter 70.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit certificates verifying non-combustible properties and fiber analysis for fire-rated claims
• Package in consumer-ready retail units to qualify as insulation products, not bulk fibers
• Watch for reclassification if fibers exceed 6mm average diameter threshold for wool definition