Soft Bitumen Fiberboard Soundproofing Backing from Mexico
Low-density fiberboard impregnated with bitumen to dampen sound vibrations, used as backing for studio walls and machinery enclosures. Matches HTS 4411.94.0050: other fiberboard ≤0.5 g/cm³, bitumen only, no working. Enhances acoustic isolation in buildings.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Test for sound transmission class (STC) ratings if required; document non-toxic bitumen
• Pitfall: industrial vs retail end-use affecting valuation