Breathable PP Housewrap Sheeting from Mexico
Microporous polypropylene film for building moisture barriers (cast, not woven). 3920.20.00 as noncellular propylene sheet despite permeability.
Duty Rate — Mexico → United States
14.2%
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
• Prove microporosity via process, not woven structure
• WVTR test data supports but doesn't change heading
• Rolls only; cut panels risk 3925 building articles