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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If polymers of other than styrene like polyethylene
Cellular foam of different base polymers (e.g., PE) uses 3921.90 per subheading notes.
If faced with mineral material like fiberboard
Composite boards with significant non-plastic content shift to Chapter 68 articles of plaster/stone.
If
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Import Tips & Compliance
• Include technical specs showing cellular structure and styrene polymer certification
• Check for size limits under US note for heading 3921 special rates
• Avoid blending with other polymers exceeding 5% threshold
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.
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.
Styrene Foam Sign Blanks
Extruded polystyrene foam boards sold as blanks for outdoor signage and displays. 3921.11.00.00 for cellular sheets of styrene polymers used in advertising. Weatherproof surface.