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U.S. exports of unvulcanized rubber compounded with carbon black or silica (HS 400510) totaled $43.4M in July 2026.
Importers of Unvulcanized Rubber Compounded with Carbon Black or Silica paid $1.3M in duties in July 2026 — an effective duty rate of 10% on $12.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataCarbon-black- and silica-compounded unvulcanized rubber—classified entirely under 4005100000—is a primary feedstock for tire manufacturing and industrial rubber goods, where the filler loading directly governs tensile strength and abrasion resistance. Thailand and Malaysia, the world's dominant natural-rubber processors, are key origins alongside Canada and Germany, reflecting both natural-rubber compounding capacity and synthetic-rubber blending expertise. Importers sourcing from Thailand or Malaysia should note that these shipments do not automatically qualify for US free-trade-agreement preference rates.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.7K shipments/mo
Heading 400510 covers the compound in primary forms (bales, pellets, granules) as well as in plates, sheets, or strip. Form does not change the classification within this heading, but if the rubber has been further shaped into finished articles, it would move to a different chapter 40 heading.
There is no minimum filler percentage specified in the tariff schedule; the key requirement is that carbon black or silica is the predominant compounding agent. Importers typically rely on the supplier's material safety data sheet or technical data sheet to document the compound composition for CBP entry purposes.
HSChapter 40
Subheading 1 of 4 in heading 4005
Subheading 400510 · $34.1M of $53.9M
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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 |
|---|---|---|---|---|---|
| 4005100000 | Rub, Unvulcanized, Compound W/ Carbon Blk/Silica | $40.2M | 3.70% | 36.94% | $1.5M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4005100000 | Rub, Unvulcanized, Compound W/ Carbon Blk/Silica | $42.7M |
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
$34.1MYoY · Pro
Exports
$43.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Mexico and Canada together take 82% of it.
customs district
origin
entry
rate provision · imports
62.5% enters free of duty; the effective duty rate is 3.78%.