Architectural Foam Relief Sheets
Polystyrene foam sheets molded with surface relief patterns for facade cornices and trim. Raw cellular styrene sheets under 3921.11.00.00 before installation. Lightweight decorative.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cement-coated for exterior finish
Cement/plaster coated foam shifts to Chapter 68 building materials.
If assembled into reservoirs/tanks
Foam used in reservoirs classifies under 3925.90 functional articles.
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Import Tips & Compliance
• Classify as sheets despite patterns; finished trim is 3926
• Pattern depth doesn't change cellular nature
• Export country flammability standards may apply
Related Products under HTS 3921.11.00.00
Styrene Expanded Polystyrene Foam Sheets
Rigid foam sheets made from expanded polystyrene (EPS), a cellular polymer of styrene, used for insulation and packaging. Classified under HTS 3921.11.00.00 as cellular plates and sheets of styrene polymers per chapter notes on polymer classification. The cellular structure provides buoyancy and thermal insulation properties.
Polystyrene Foam Insulation Panels
Extruded polystyrene (XPS) foam panels designed for building wall and roof insulation. Falls under 3921.11.00.00 as cellular sheets of styrene polymers, confirmed by predominant styrene content. Provides high R-value thermal resistance.
EPS Foam Packaging Sheets
Beadboard expanded polystyrene sheets cut to size for protective packaging of electronics and appliances. Classified in 3921.11.00.00 for cellular styrene polymer sheets used in shipping. Lightweight and shock-absorbent.
Styrene Foam Board for Model Making
High-density polystyrene foam boards used by hobbyists for architectural models and crafts. Meets 3921.11.00.00 as cellular sheets of styrene polymers per weight predominance rule. Easily cut and painted.
Cellular PS Diffusion Plates
Polystyrene foam sheets engineered as light diffusion panels for LED lighting fixtures. Under 3921.11.00.00 for cellular styrene sheets with light-scattering cellular structure. Used in commercial displays.
Polystyrene Foam Underlayment Sheets
EPS foam sheets used as flooring underlayment for sound and thermal insulation beneath laminate tiles. Classified 3921.11.00.00 as cellular styrene polymer plates. Moisture-resistant grade.