Asphalt Saturated Felt Paperboard
Dense felt paperboard saturated with asphalt, used primarily as underlayment in roofing applications to provide waterproofing and protection. It falls under HTS 4805.50.00.00 as felt paperboard, which is a type of uncoated paperboard formed by compressing fibers into a felted structure without further processing beyond note 3 specifications. Typically weighs over 200 g/m² and supplied in rolls for construction use.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing ≥25% asphalt binder by weight and presented as roofing shingle underlayment
Products with significant asphalt content may classify as asphalt articles of heading 6807 rather than paper products.
If coated with asphalt after felting for weatherproofing
Asphalt coating changes it from uncoated felt paperboard to coated paper under heading 4811.
If Textile-backed felt paper treated with asphalt
Textile base shifts classification to impregnated textile fabrics of heading 5907.
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Import Tips & Compliance
• Verify fiber composition and saturation process documentation to confirm classification as felt paperboard, avoiding misclassification as coated paper under 4811
• Provide mill test reports showing Mullen burst strength and weight to prove compliance with uncoated felt specs; common pitfall is inadequate roofing end-use certification
• Ensure rolls or sheets are not further worked (e.g
• no printing or perforation) per chapter note, or risk reclassification to chapter 48 headings like 4823
Related Products under HTS 4805.50.00.00
Roofing Tar Paper Felt
Heavyweight felt paper impregnated with tar or bitumen for use as a moisture barrier in roofing systems under shingles. Classified under HTS 4805.50.00.00 as uncoated felt paper in rolls, meeting the felted fiber structure without additional processing. Common grammage 100-300 g/m² with high tear resistance.
Millboard Felt Paper
Thick, dense felted paperboard known as millboard, used for insulating panels, bookbinding, and gaskets. HTS 4805.50.00.00 covers this uncoated felt paperboard in sheets or rolls, produced by felting wood or rag fibers without chemical coatings. Typically 500-1000 g/m² with high compressive strength.
Bookbinding Grayboard Felt
Recycled fiber felt paperboard, gray in color, used as rigid covers and spines in bookbinding. Classified in HTS 4805.50.00.00 as uncoated felt paperboard sheets, typically 800-1200 g/m², chipboard-style but distinctly felted.
Acoustic Ceiling Tile Felt Paper
Felted paperboard base layer for acoustic ceiling tiles, providing sound absorption before final surfacing. HTS 4805.50.00.00 for uncoated felt paperboard in sheets, 300-500 g/m², fibrous structure traps sound waves.
Rag Felt Paperboard
Traditional felt paperboard made from cotton rag fibers, used for artists' supports and premium gaskets. Under HTS 4805.50.00.00 as specialty uncoated felt paperboard sheets, prized for purity and texture.
Insulating Felt Paperboard
Low-density felt paperboard designed for thermal and acoustic insulation in building walls and machinery. Under HTS 4805.50.00.00 as uncoated felt paperboard, featuring interlaced fibers for air-trapping properties, supplied in rolls over 150 g/m².