Polyurethane Structural Cement
CN → US| HS编码 | 关税税率 | 原产国 | 目的国 | 文档 |
|---|---|---|---|---|
| 3909505000 | 41.3% | CN | US | 官方文档 |
| 3909502000 | 37.1% | CN | US | 官方文档 |
| 3506915000 | 37.1% | CN | US | 官方文档 |
| 3506990000 | 37.1% | CN | US | 官方文档 |
| 3909505000 | 41.3% | CN | US | 官方文档 |
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AI分析
🏗️ Polyurethane Structural Cement: HS Code Classification & Customs Clearance Guide (2026)
🌐 HS Code Reference & Customs Strategy | 2026 Latest Tariff Analysis | Professional Clearance Protocol
📌 I. Product Definition & Classification: What Exactly Is "Polyurethane Structural Cement"?
Polyurethane Structural Cement is a specialized composite construction material that integrates polyurethane resin with cementitious components. In international trade, its classification hinges on whether it is viewed primarily as a polymeric resin or as a prepared adhesive. The distinction determines the HS Code and, consequently, the total tax burden.
⚠️ Key Distinction Point:
- If classified as a Polyurethane Resin/Chemical → HS Codes 3909.50.50.00 (Higher Base Tariff)
- If classified as a Polymer-based Adhesive/Glue → HS Codes 3506.91.50.00 or 3506.99.00.00 (Lower Base Tariff)
📦 II. HS Code Classification Details (2026 Latest Tariff Alignment)
| HS Code | Product Description | Applicable Scenario | Material Basis |
|---|---|---|---|
3909.50.50.00 |
Polyurethane resins in primary forms; composite application forms | Structural cement containing PU components, no material conflict with resin limits | ✅ Polyurethane Resin/Chemical |
3909.50.20.00 |
Polyurethane resins in primary forms; typical application forms | Standard PU product forms fitting resin category limits | ✅ Polyurethane Resin/Chemical |
3506.91.50.00 |
Other prepared adhesives based on polymers; polymer-based binders | PU-based adhesives fitting "polymer-based binder" material requirements | ✅ Polymer-based Adhesive |
3506.99.00.00 |
Other prepared adhesives; common adhesive materials | Formulated adhesives fitting general adhesive categories | ✅ Prepared Adhesive |
🔍 Key Reminder:
- "Structural Cement" is a composite form. It can be argued as either a resin application or an adhesive formulation. - No material conflict: Polyurethane components are inherent to both resin and adhesive classifications, but the base tariff rate differs significantly.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: 2025 November 10 onwards (including subsequent imports)
🎯 1. 3909.50.50.00 — Polyurethane Resin/Composite Application
| Item | Content |
|---|---|
| Base Tariff | 6.3% (Ad Valorem) |
| Section 301 Surcharge | +25.0% (USITC Footnote 9903.88.01) |
| Section 122 / IEEPA Add-on | +10.0% (Targeting China/HK products) |
| Total Tax Rate | 41.3% |
| Tax Calculation | CIF Value × 41.3% |
| De Minimis Exemption? | ❌ No (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3909.50.50.00 → FOOTNOTE:9903.88.01 |
📌 Explanation:
- The 6.3% base tariff is significantly higher than the adhesive category. - Combined with 25% Section 301 and 10% IEEPA, the total burden is 41.3%. - This classification is riskier for cost control due to the higher base rate.
🎯 2. 3909.50.20.00 — Polyurethane Resin (Typical Form)
| Item | Content |
|---|---|
| Base Tariff | 2.1% (Ad Valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 / IEEPA Add-on | +10.0% |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value × 37.1% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9901.25 → IEEPA:9903.01.24 → USITC:3909.50.20.00 → FOOTNOTE:9903.88.01 |
📌 Note:
- Lower base tariff (2.1%) makes this cheaper than 3909.50.50.00 by 4.2 percentage points. - Suitable if the product can be clearly defined as a "typical form" of PU resin rather than a composite cement mix.
🎯 3. 3506.91.50.00 — Polymer-Based Adhesive
| Item | Content |
|---|---|
| Base Tariff | 2.1% (Ad Valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 / IEEPA Add-on | +10.0% |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value × 37.1% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9901.25 → IEEPA:9903.01.24 → USITC:3506.91.50.00 → FOOTNOTE:9903.88.01 |
📌 Critical Advantage:
- Classified as an adhesive (based on polymer binders). - Same total rate as 3909.50.20.00 (37.1%), but often easier to justify for construction chemicals.
🎯 4. 3506.99.00.00 — Other Prepared Adhesives
| Item | Content |
|---|---|
| Base Tariff | 2.1% (Ad Valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 / IEEPA Add-on | +10.0% |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value × 37.1% |
| De Minimis Exemption? | ❌ No |
| Legal Basis Path | IEEPA:9901.25 → IEEPA:9903.01.24 → USITC:3506.99.00.00 → FOOTNOTE:9903.88.01 |
📌 General Category:
- A "catch-all" for formulated adhesives. - Useful if the product doesn't fit the specific "polymer-based" definition of 3506.91.50.00.
🛠️ IV. Customs Clearance Operational Advice (Practical Pitfall Avoidance)
✅ 1. Required Documentation Checklist (None Can Be Omitted)
| Document | Must Provide | Explanation |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must detail composition: % PU resin, % cement, additives. |
| ✅ Formula/Composition Breakdown | ✔️ | Critical for distinguishing between "Resin" vs. "Adhesive". |
| ✅ Product Photos (with Label) | ✔️ | Clear view of packaging, warnings, and intended use (e.g., "Structural Bonding"). |
| ✅ Third-Party Test Report | ✔️ | Strength tests, chemical resistance, polymer content verification. |
| ✅ Commercial Invoice | ✔️ | Describe as "Polyurethane Adhesive" or "Polymer-Based Structural Cement" — avoid vague terms. |
| ✅ Certificate of Origin (CO) | ✔️ | If not CN origin, may qualify for lower rates. |
| ✅ Packing List | ✔️ | Show single-item shipments to avoid split declaration issues. |
✅ 2. Declaration Strategies (Key Mnemonics)
🔥 "Adhesive Wins, Resin Costs More; Base Rate is Key!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| High PU Content, Primary Use: Bonding | 3506.91.50.00 or 3506.99.00.00 (37.1%) |
Declared as 3909.50.50.00 → 41.3% |
| Cement-Dominant, PU as Additive | Argue for 3506.99.00.00 |
Declared as 3909.50.20.00 → Risk of reclassification |
| Pure PU Resin (No Cement) | 3909.50.20.00 |
Declared as adhesive → Customs Rejection |
| Mixed Chemical Package | Provide formula proof | Vague description → Audit/Seizure |
✅ 3. Special Circumstances Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Formulations | Provide client specs + R&D formulas to justify adhesive classification. |
| Dual-Use (Sealant + Adhesive) | Use 3506.99.00.00 as it covers "other prepared adhesives." |
| New Product Launch | Request Advance Ruling (CBP Ruling) to lock in HS Code. |
| Supply Chain Diversification | If shipped from Vietnam/Mexico, check for IEEPA exemptions. |
🌍 V. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Total Tariff | Certification Required | Notes |
|---|---|---|---|---|
| 🇺🇸 United States | 3506.91.50.00 / 3506.99.00.00 |
37.1% | TSCA + SDS | Avoid 3909.50.50.00 (41.3%) |
| 🇨🇳 China | 3506.91.50.00 |
5% | ISO 9001 | No Section 301/IEEPA |
| 🇪🇺 EU | 3506.91.50.00 |
0%~6.5% | REACH + CLP | No major surcharges |
| 🇦🇺 Australia | 3506.99.00.00 |
5% | GHS | Stable rates |
| 🇯🇵 Japan | 3506.91.50.00 |
0%~2.5% | JIS | Low duty environment |
📌 Conclusion:
- The US is the most expensive market due to 301 + IEEPA surcharges. - Choosing3506(Adhesive) over3909.50.50(Resin) saves 4.2% on total duty. - Non-China origins (e.g., Vietnam) may still face US surcharges, so verify origin rules carefully.
📌 VI. Common Errors & Pitfall Guide (Lessons Learned)
❌ Error 1: Declaring "Polyurethane Cement" as 3909.50.50.00 (Resin)
👉 Consequence: Pay 41.3% instead of 37.1%. Unnecessary 4.2% cost increase.
❌ Error 2: Vague description "Chemical Material"
👉 Consequence: Customs assigns highest possible duty + penalties. Delays & Seizures.
❌ Error 3: Ignoring Section 122 / IEEPA 10%
👉 Consequence: Underpayment leads to back-taxes + interest. Total 41.3% or 37.1% is mandatory.
❌ Error 4: Claiming "Adhesive" when product is >90% Raw PU Resin
👉 Consequence: Customs reclassifies to 3909.50.20.00 or 50.50. Audits & Back-payment.
✅ Correct Practice:
"Polyurethane-Based Structural Adhesive Cement, Formulated Polymer Binder, Model XYZ, SDS Attached, TSCA Compliant"
🎯 VII. Conclusion: Precision Classification Saves Money!
🎯 Remember the Golden Rule:
🔹 "Adhesive (3506) = 37.1% | Resin (3909.50.50) = 41.3%. Choose Adhesive if applicable!"
🔹 "HS Code determines tax, 4% difference is pure profit!"
🔹 "Declare accurately, avoid audits, and secure your margin!"
📌 Pro Tip:
If your Polyurethane Structural Cement is originated from Vietnam, Mexico, or Thailand, apply for IEEPA Exemption. The tax could drop to 0%~5%.
Recommendation: Always apply for a CBP Advance Ruling before large shipments to lock in the lower 3506 classification.
📣 Immediate Action:
📞 Contact a certified customs broker + Provide Formula Breakdown + Apply for HS Code Advance Ruling
🚀 Ensure your Polyurethane Structural Cement clears smoothly, efficiently, and profitably!
✨ Professional Clearance Starts with Accurate Classification!
💼 Every cent of duty saved is a cent of profit earned!
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关于 HS 编码归类
协调制度（HS）是由世界海关组织（WCO）制定的国际贸易商品分类标准。全球 200 多个国家采用 HS 系统作为海关关税、贸易统计和进出口监管的基础。
每个 HS 编码遵循以下层级结构：
- 章（2 位）——商品大类（例如：第 84 章：机器和机械设备）
- 品目（4 位）——章内的更具体分类
- 子目（6 位）——国际通用细分，所有 WCO 成员国统一使用
- 本国细分（8-10 位）——各国自行扩展的细分编码，如美国 HTSUS 10 位编码
正确的 HS 编码归类对于顺利通关、准确缴纳关税和遵守贸易法规至关重要。错误归类可能导致海关延误、多缴关税或罚款。
从CN进口到US时，适用的关税税率可能包括：
- 最惠国（MFN）税率——适用于 WTO 成员国的标准关税税率
- 普通税率——适用于无贸易协定国家
- 贸易救济关税——附加关税，如 301 条款（反倾销）、232 条款（国家安全）或反补贴税
本页内容仅供参考。如需正式归类，请咨询当地海关或持牌报关代理。