U.S. imports of Mixtures of Natural and Synthetic Rubber (HS 400280) totaled $57K in August 2026, imported from 11 countries.
Importers of Mixtures of Natural and Synthetic Rubber paid $381 in duties in August 2026, an average duty rate of 0.66% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Mixtures of Natural and Synthetic Rubber imports of $57K in August 2026 ran 25% below the year-to-date monthly average of $76K.
Last updated: August 2026 dataBlends of natural rubber or similar natural gums with synthetic rubber — and factice derived from oils — occupy a specialized classification niche under heading 4002, covering compounds that combine the resilience of natural rubber with the chemical or thermal resistance of synthetic polymers. France and Mexico are the leading US suppliers. Imports from Mexico may qualify for USMCA preferential tariff treatment, subject to applicable rules of origin. The single US tariff line is 4002800000, and accurate blend-ratio documentation is essential because misclassification between pure synthetic rubber and a natural/synthetic mixture is a common audit finding.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
6 import shipments a month
The HTS does not specify a minimum natural rubber content threshold; classification as a mixture under heading 4002 depends on whether the product is a deliberate blend of natural rubber (heading 4001) with synthetic rubber (heading 4002) or factice. A product that is predominantly synthetic rubber with only incidental natural rubber content may still classify as a pure synthetic rubber. Importers should document the formulation and consult a licensed customs broker or seek a binding ruling when the blend ratio is near a classification boundary.
Factice is a rubber-like material produced by treating vegetable or animal oils with sulfur or sulfur chloride. When blended with natural or synthetic rubber, the resulting mixture still classifies under heading 4002 (specifically 4002800000) provided it meets the general definition of a rubber mixture in that heading. Factice alone, without rubber, classifies elsewhere, so the presence and proportion of factice relative to rubber content should be clearly stated in product documentation.
Subheading 14 of 14 in heading 4002
Subheading 400280 · $57K of $114.5M
Trade Directory
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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 |
|---|---|---|---|---|---|
| 4002800000 | Mixtures of Product Hdg 4001 With Product Hdg 4002 | $57K | 0.66% | 2.43% | $381 |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4002800000 | Mixtures of Product Hdg 4001 With Product Hdg 4002 | $54K |
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
$57KYoY · free account
Exports
$54KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $870K of Mixtures of Natural and Synthetic Rubber and exported $1.2M.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Mexico and China together supply 99% of it. China pays 37.5% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
97.6% enters free of duty; duty collected equals 0.66% of imports for consumption.