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HSChapter 40
U.S. exports of unvulcanized compounded rubber in primary forms (nesoi) (HS 400599) totaled $19.4M in July 2026.
Importers of Unvulcanized Compounded Rubber in Primary Forms (NESOI) paid $337K in duties in July 2026 — an effective duty rate of 11% on $3.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Unvulcanized Compounded Rubber in Primary Forms (NESOI) imports of $3.2M in July 2026 ran 12% above the year-to-date monthly average of $2.9M.
Last updated: July 2026 dataCompounded unvulcanized rubber in primary forms—bales, pellets, crumbs, and similar bulk shapes—that do not fit the more specific carbon-black, silica, solution, or dispersion headings classifies under 4005990000. South Korea and Turkey are the leading US suppliers, reflecting significant synthetic-rubber compounding capacity in both countries, with Italy, Germany, and the United Kingdom also active. The breadth of the NESOI designation means classification disputes are common when compound formulations straddle multiple headings, making supplier documentation critical.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
88 shipments/mo
Importers should obtain a technical data sheet or certificate of analysis specifying the compound's filler type, polymer base, and physical form. If carbon black or silica is the primary filler, the goods belong under 400510; if the material is in solution or dispersion, it belongs under 400520. Only compounds that genuinely fall outside those descriptions should be entered under 4005990000.
South Korea is a US free-trade-agreement partner under KORUS, so qualifying originating goods may be eligible for reduced or zero duty rates. Importers must obtain a valid certificate of origin or equivalent documentation and confirm the goods meet KORUS rules-of-origin requirements to claim the preference.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 4005990000 | Compound Rub, Unvulcanized, In Primary Form, NESOI | $3.2M | 10.45% | 93.21% | $337K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4005990000 | Compound Rub, Unvulcanized, In Primary Form, NESOI | $19.4M |
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.
ImportsExports
Imports
$3.2MYoY · Pro
Exports
$19.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Mexico and Colombia together take 41% of it.
customs district
origin
entry
rate provision · imports
6.8% enters free of duty; the effective duty rate is 10.45%.