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PS Foam Boards

Cellular polystyrene foam boards for insulation and model making. Under 3921.19.00.90 as expanded PS sheets of other plastics.

Import Duty Rates by Country of Origin

Origin Country	MFN Rate	Ch.99 Surcharges	Total Effective Rate
🇨🇳China	6.5%	+35.0%	41.5%
🇲🇽Mexico	6.5%	+10.0%	16.5%
🇨🇦Canada	6.5%	+10.0%	16.5%
🇩🇪Germany	6.5%	+10.0%	16.5%
🇯🇵Japan	6.5%	+10.0%	16.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3921.11.00Lower: 40.3% vs 41.5%

If cellular polystyrene specifically

Heading 3921 has dedicated subheading for cellular PS.

3923.10.20Lower: 35% vs 41.5%

If articles for packing/conveyance

End-use as packaging changes from sheets to specific articles.

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Import Tips & Compliance

• Confirm expanded/cellular vs extruded rigid PS boards

• Small sizes (≤38.1x45.7cm) may get Free (B); measure precisely

• Not classifiable as household articles (photo albums excluded per note)

Related Products under HTS 3921.19.00.90

PET Foam Core Sheets

Lightweight cellular polyethylene terephthalate (PET) foam sheets for sandwich panel cores in aerospace and marine applications. Falls under 3921.19.00.90 as cellular sheets of other plastics (PET predominates per polymer notes).

Cellular Acrylic Sheets

Foamed acrylic polymer sheets for signage and displays, cellular structure of other plastics. 3921.19.00.90 as acrylic predominates but no specific acrylic cellular subheading.

Cellular ABS Sheets

Foamed acrylonitrile-butadiene-styrene (ABS) copolymer sheets for thermoforming. 3921.19.00.90 since ABS blend doesn't meet single monomer 95% rule.

Cellular PP Sheets

Foamed polypropylene sheets for automotive and construction uses. HTS 3921.19.00.90 for cellular other plastics.

Noryl Foam Sheets

Cellular modified polyphenylene oxide (Noryl) sheets for engineering applications. 3921.19.00.90 as chemically modified other plastics.

Cellular PVC Foam Board

Rigid sheets made from cellular polyvinyl chloride (PVC) used for signage, displays, and construction panels. Classified under HTS 3921.19.00.90 as cellular plastic sheets of other plastics (PVC), not rigid or flexible, in rectangular form.