U.S. exports of Polymers of Other Halogenated Olefins, in Primary Forms (HS 390490) totaled $5.2M in August 2026.
Importers of Polymers of Other Halogenated Olefins, in Primary Forms paid $46K in duties in August 2026, an average duty rate of 14.86% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Polymers of Other Halogenated Olefins, in Primary Forms imports of $302K in August 2026 ran 66% below the year-to-date monthly average of $894K.
Last updated: August 2026 dataPolymers of halogenated olefins not elsewhere specified occupy a technically demanding niche, encompassing materials such as polychlorotrifluoroethylene (PCTFE) and related specialty halogenated resins used in barrier packaging, cryogenic seals, and electrical insulation. The US tariff schedule now subdivides this heading into elastomeric (3904901000) and non-elastomeric (3904905000) grades, with a legacy undivided line (3904900000) also present. Japan and the Netherlands are the leading sources of US imports under this heading, with South Korea and Germany also contributing meaningfully to supply.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
11 import shipments a month
The elastomeric line (3904901000) covers halogenated olefin polymers that behave like rubbers — flexible and recoverable under deformation — while the non-elastomeric line (3904905000) covers rigid or semi-rigid grades. Correct classification requires review of the polymer's physical properties and, where ambiguous, a binding ruling request to CBP.
The undivided line (3904900000) predates the elastomeric/non-elastomeric split and may still appear on older entry documents or for goods that do not clearly fit either subdivision. Importers should use the most specific applicable line; if classification is uncertain, a licensed customs broker can advise on the appropriate line given current CBP guidance.
Subheading 7 of 9 in heading 3904
Subheading 390490 · $5.2M of $346.8M
ImportsExports
Imports
$302KYoY · free account
Exports
$5.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $10.5M of Polymers of Other Halogenated Olefins, in Primary Forms and exported $58.8M.
Through August 2026. Source: U.S. Census Bureau.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3904905000 | Polymers of Oth Halog Olefins, Prim Frm, Not Elastom | $162K | 12.56% | 99.60% | $20K |
| 3904901000 | Polymers of Oth Halog Olefins, Prim Frm, Elastomeric | $144K | 17.44% | 97.36% | $25K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3904900000 | Polymers of Oth Halog Olefins, Primary Form, NESOI | $5.2M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Exports · August 2026
destination
Mexico and Canada together take 41% of it.
customs district
origin
entry
rate provision · imports
0.2% enters free of duty; duty collected equals 14.86% of imports for consumption.