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U.S. imports of urea resins & thiourea resins, primary forms (HS 390910) totaled $3.8M in July 2026, traded with 20 countries.
Importers of Urea Resins & Thiourea Resins, Primary Forms paid $276K in duties in July 2026 — an effective duty rate of 15% on $1.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataUrea-formaldehyde and thiourea-formaldehyde resins are the dominant binders in wood-based panel manufacturing — particleboard, MDF, and plywood — and also serve as molding compounds and paper-treatment agents. All US imports under this heading are classified under a single 10-digit line (3909100000), with no further tariff subdivision. Germany leads supply, followed by Canada and Mexico, a pattern consistent with integrated North American forest-products supply chains and European chemical exports.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
108 shipments/mo
While customs classification under 3909100000 does not itself trigger an admissibility review, downstream products made with urea-formaldehyde resins — such as composite wood panels — must comply with EPA TSCA Title VI formaldehyde emission standards. Importers of the resin itself should be aware that their customers' finished goods may face these requirements, which can influence purchasing specifications.
Urea resins (3909.10) are formed from urea or thiourea reacted with formaldehyde, while melamine resins (3909.20) use melamine as the amino compound. Melamine resins offer superior moisture and heat resistance, commanding a price premium. If a product is a urea-melamine copolymer, classification depends on which component predominates, and a customs broker should be consulted.
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Subheading 5 of 6 in heading 3909
Subheading 390910 · $3.8M of $81.3M
ImportsExports
Imports
$3.8MYoY · Pro
Exports
$4.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 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 | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3909100000 | Urea Resins,Thiourea Resins | $3.8M | 7.16% | 47.40% | $276K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3909100000 | Urea Resins,Thiourea Resins | $4.4M |
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.
Imports · July 2026
origin
Canada and Germany together supply 64% of it.
customs district
destination
entry
rate provision · imports
52.6% enters free of duty; the effective duty rate is 7.16%.