U.S. exports of Non-Expansible Polystyrene in Primary Forms (SITC 57219) totaled $21.1M in August 2026.
Importers of Non-Expansible Polystyrene in Primary Forms paid $552K in duties in August 2026, an average duty rate of 8.32% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Non-Expansible Polystyrene in Primary Forms imports of $6.6M in August 2026 ran 24% above the year-to-date monthly average of $5.3M.
Last updated: August 2026 dataGeneral-purpose and high-impact polystyrene (GPPS and HIPS) in pellet or granule form fall under this heading, covering the broad category of polystyrene resins that do not contain a blowing agent. GPPS offers optical clarity for packaging and display applications, while HIPS — rubber-toughened with polybutadiene — serves appliance housings, refrigerator liners, and consumer electronics enclosures. The distinction between GPPS and HIPS is commercially significant but does not create a separate SITC subdivision at this level.
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219 import shipments a month
At the SITC 5-digit level, both GPPS and HIPS fall within this heading as non-expansible polystyrene. At the HTS 10-digit level, however, subdivisions may distinguish them, so importers should verify the applicable tariff line based on the resin's rubber modifier content and consult a customs broker for precise duty determination.
A manufacturer's certificate of analysis or technical data sheet confirming the absence of incorporated blowing agents is standard. If the resin is a copolymer or blend, the comonomer identity should also be documented to confirm it does not belong in a more specific styrene copolymer heading.
Basic heading 181 of 465 in section 5
Basic heading 57219 · $21.1M of $26.2B
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Exports · August 2026
destination
Mexico and Canada together take 79% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$6.6MYoY · free account
Exports
$21.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $58.0M of Non-Expansible Polystyrene in Primary Forms and exported $227.1M.
Through August 2026. Source: U.S. Census Bureau.