Housewrap Microporous Polypropylene Film
Microporous polypropylene breathable film used in construction housewrap for moisture vapor transmission. Falls under HTS 3921.19.0010 as cellular microporous sheet of polypropylene in the 'other plastics' category.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cellular sheets of other plastic types
Non-PE/PP cellular films (e.g., polyester-based) classified under other cellular plastics.
If coated with textile material
Textile fabrics impregnated/coated with plastics shift to Chapter 59 classification.
If in primary roll form >20cm wide, unsupported
Certain wide unsupported plastic floor coverings, but only if presented as such.
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Import Tips & Compliance
• Test for ASTM E96 water vapor transmission to document breathability confirming microporous structure
• Rolls must not exceed 48.5cm width for potential Free (B) treatment per heading 3921 US note
• Avoid bulk packaging confusion with retail; classify by material form, not end-use packaging
Related Products under HTS 3921.19.00.10
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This is a cellular microporous polyethylene film designed for breathable applications, allowing vapor transmission while blocking liquids. It falls under HTS 3921.19.0010 as it is a microporous sheet of polyethylene, classified as 'other plastics' cellular plates, sheets, film with microvoids formed during extrusion.
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