U.S. exports of Other Propylene & Olefin Polymers in Primary Forms (NESOI) (HS 390290) totaled $59.7M in August 2026.
Importers of Other Propylene & Olefin Polymers in Primary Forms (NESOI) paid $1.8M in duties in August 2026, an average duty rate of 8.63% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Other Propylene & Olefin Polymers in Primary Forms (NESOI) imports of $21.1M in August 2026 ran 36% above the year-to-date monthly average of $15.5M.
Last updated: August 2026 dataHeading 390290 captures propylene and other olefin polymers not classified elsewhere, with the US schedule distinguishing polybutylene (3902900010) from all remaining NESOI grades (3902900050). Polybutylene is a specialty resin used in hot-melt adhesives, pipe systems, and flexible packaging, while the NESOI line encompasses a range of higher-alpha-olefin polymers and blends. South Korea and Canada are the leading US suppliers. Importers should be attentive to the polybutylene vs. NESOI split, as polybutylene has a distinct tariff line and misclassification can trigger duty discrepancies.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
370 import shipments a month
Polybutylene is a polymer in which 1-butene is the principal monomer, giving it distinct crystallinity and creep-resistance properties. Any other propylene or olefin polymer not specifically provided for elsewhere in heading 3902 falls into the NESOI line. Importers should obtain a monomer-composition certificate from the supplier to support the polybutylene classification where applicable.
The NESOI line covers a diverse range of specialty polyolefins used in hot-melt adhesive formulations, wax blends, and advanced film structures. Demand is closely tied to packaging, construction adhesive, and nonwoven fabric production cycles. Because these are often specialty or custom grades, supply chains tend to be more concentrated and lead times longer than for commodity resins.
Subheading 3 of 4 in heading 3902
Subheading 390290 · $59.7M of $382.6M
ImportsExports
Imports
$21.1MYoY · free account
Exports
$59.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $176.4M of Other Propylene & Olefin Polymers in Primary Forms (NESOI) and exported $583.9M.
Through August 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 3902900050 | Polymers of Propylene/Othr Olefins Prim Form, NESOI | $17.0M | 8.51% | 81.39% | $1.4M |
| 3902900010 | Polybutylene | $4.0M | 9.15% | 78.18% | $368K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3902900050 | Polymers of Propylene/Othr Olefins Prim Form, NESOI | $56.7M |
| 3902900010 | Polybutylene | $3.0M |
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.
Trade Directory
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Exports · August 2026
destination
Singapore and Belgium together take 40% of it.
customs district
origin
entry
rate provision · imports
19.1% enters free of duty; duty collected equals 8.63% of imports for consumption.