U.S. imports of Urea Resins & Thiourea Resins, Primary Forms (HS 390910) totaled $5.9M in August 2026, imported from 20 countries.
Importers of Urea Resins & Thiourea Resins, Primary Forms paid $403K in duties in August 2026, an average duty rate of 6.80% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Urea Resins & Thiourea Resins, Primary Forms imports of $5.9M in August 2026 ran 35% above the year-to-date monthly average of $4.4M.
Last updated: August 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.
159 import shipments a month
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.
Subheading 4 of 6 in heading 3909
Subheading 390910 · $5.9M of $149.0M
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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 |
|---|---|---|---|---|---|
| 3909100000 | Urea Resins, Thiourea Resins | $5.9M | 6.80% | 56.57% | $403K |
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 | $4.7M |
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
$5.9MYoY · free account
Exports
$4.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $49.1M of Urea Resins & Thiourea Resins, Primary Forms and exported $48.1M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Canada and Germany together supply 81% of it. Norway pays 19.0% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
43.4% enters free of duty; duty collected equals 6.80% of imports for consumption.