Unsaturated Polyester Resin for Spraying
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3907912000 | 35.0% | CN | US | Official Doc |
| 3907915000 | 41.5% | CN | US | Official Doc |
| 3907915000 | 41.5% | CN | US | Official Doc |
| 3907912000 | 35.0% | CN | US | Official Doc |
| 3907915000 | 41.5% | CN | US | Official Doc |
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AI Analysis
π¨ Unsaturated Polyester Resin for Spraying (Sprayable UPR)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Classification Strategy
π I. Product Definition & Classification: What is "Unsaturated Polyester Resin for Spraying"?
Unsaturated Polyester Resin (UPR) for spraying is a thermosetting resin primarily used in fiberglass reinforced plastics (FRP), marine coatings, automotive parts, and architectural panels. It is characterized by low viscosity (to facilitate spray application) and usually requires a styrene monomer as a reactive diluent.
In international trade, the critical distinction lies in the specific chemical composition and primary shape: * Is it a pure unsaturated polyester? β Falls under Chapter 39. * Does it contain specific additives that change its classification? β May fall elsewhere.
β οΈ Key Distinction Point:
- If the resin is a primary shape (liquid/paste) and consists essentially of unsaturated polyester, it is classified under HS 3907.
- The specific subheading depends on the exact polymer structure (e.g., standard vs. specific modified polyesters) and tax treatment rules applicable to the country of origin (typically China to US in this context, given the 122 Tariff Clause reference).
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Match)
Based on the provided data, two primary HS Codes are relevant, differing only in the base tariff rate due to specific chemical subclassifications or regulatory interpretations.
| HS Code | Product Description | Key Characteristics | Base Tariff |
|---|---|---|---|
3907.91.20.00 |
Unsaturated Polyester Resin (Spray Grade) | Liquid resin, unsaturated polyester, primary shape. Zero base duty scenario. | 0.0% |
3907.91.50.00 |
Unsaturated Polyester Resin (Spray Grade) | Liquid resin, unsaturated polyester, primary shape. 6.5% base duty scenario. | 6.5% |
π Important Note:
- Both codes describe transparent/semi-transparent unsaturated polyester resins suitable for spraying.
- The difference lies in the specific subheading definition within HS 3907.91.
-3907.91.20.00is often used for resins that may have been interpreted as having no base duty under certain historical or specific trade agreements, while3907.91.50.00is the standard classification with a 6.5% base rate.
- Crucially, both are subject to the same Additional Tariffs (Section 301 and IEEPA).
π° III. 2026 Latest Tariff Rate Breakdown (Including Additional Taxes & Policy Surcharges)
β Applicable Country: United States (US)
β Country of Origin: China (CN)
β Effective Date: November 10, 2025 onwards (for subsequent imports)
π― 1. HS Code 3907.91.20.00 β Unsaturated Polyester Resin (Zero Base Duty Variant)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| Section 301 Additional Tariff | +25.0% (from USITC Footnote 9903.88.01) |
| IEEPA Additional Tariff | +10.0% (Targeting China/HK products, effective Nov 10, 2025) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption Eligible? | β No (deny_de_minimis) |
| Legal Authority Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3907.91.20.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- Even with a 0% base duty, the 35% total tax makes this product expensive to import into the US.
- The 25% Section 301 tariff is the standard trade war penalty.
- The 10% IEEPA tariff is a new layer targeting specific Chinese chemical inputs.
π― 2. HS Code 3907.91.50.00 β Unsaturated Polyester Resin (Standard Variant)
| Item | Content |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Additional Tariff | +25.0% |
| IEEPA Additional Tariff | +10.0% |
| Total Tariff Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption Eligible? | β No (deny_de_minimis) |
| Legal Authority Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3907.91.50.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- This is the more common classification for standard unsaturated polyester resins.
- The 6.5% base duty adds to the total cost, pushing the total tariff to 41.5%.
- Both codes are subject to the same additional taxes, so the difference is solely the 6.5% base rate.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance)
β 1. Documentation Checklist (Essential)
| Document | Required | Notes |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must state: "Unsaturated Polyester Resin," "Viscosity (cP)," "Styrene Content %," "Hardener Type." |
| β Safety Data Sheet (SDS) | βοΈ | Must confirm hazardous nature (flammable, reactive). Classify as UN 1263 or UN 3082 for shipping. |
| β Composition Analysis | βοΈ | To prove it is UNSATURATED polyester, not saturated or other polymers. |
| β Commercial Invoice | βοΈ | Clear description: "Unsaturated Polyester Resin for Spray Coating, Model XYZ, Made in China." |
| β Certificate of Origin (CO) | βοΈ | Required to verify Country of Origin (China) for Section 301/IEEPA application. |
| β Packaging List | βοΈ | Indicate net weight vs. gross weight. Resin is often liquid, so weight is critical. |
β 2. Declaration Tips (Key Mantras)
π₯ βLiquid Resin, Spray Grade, No Solid Parts, Declare as Chemical!β
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Liquid UPR in drums/buckets | 3907.91.20.00 or 3907.91.50.00 |
Misdeclaring as "Plastic Pellets" β Wrong classification |
| Resin with Pre-mixed Catalyst | Still 3907.91.xxxx (if catalyst is < threshold) |
Separating into "Resin" and "Catalyst" β Complex clearance, higher risk |
| Solid UPR Sheets (Rare for Spray) | Different HS Code (e.g., 3920) | Misdeclaring solid sheets as "liquid resin for spray" β Fraud risk |
| Resin with Fillers (e.g., Talc) | Check if it exceeds "Primary Shape" criteria | Overstating fillers β May shift to Chapter 32 or 39 other headings |
β 3. Special Cases & Handling
| Situation | Handling Advice |
|---|---|
| OEM Custom Resin | Provide customer order + technical formula. Proves itβs a specific UPR, not a generic mixture. |
| High Styrene Content (>50%) | Flag as Hazardous Material (HazMat) for ocean/air freight. Higher shipping costs. |
| Pre-mixed with Methyl Ethyl Ketone Peroxide (MEKP) | DO NOT MIX BEFORE SHIPMENT unless itβs a single-unit kit. Mixing before import may classify it as a "Prepared Chemical" with different duties or safety rules. |
| Origin Tracing | Ensure the polyester resin base is synthesized in China. If only final mixing is done in Vietnam/Malaysia, Country of Origin is still China β Tariffs still apply. |
π V. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Total Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3907.91.20.00 / 3907.91.50.00 |
35.0% or 41.5% | SDS, HazMat Compliance | High tariff burden. No de minimis. |
| π¨π³ China | 3907.91.20.00 / 3907.91.50.00 |
Low (~0-6.5%) | No major import barriers | Domestic production hub. |
| πͺπΊ EU | 3907.91.00 |
0% - 4.5% | REACH Registration, CLP Labeling | REACH compliance is critical. High regulatory cost, but low duty. |
| π―π΅ Japan | 3907.91.00 |
~6.5% | JIS Standards | Moderate duty, strict quality checks. |
| π¦πΊ Australia | 3907.91.00 |
5.0% | Asbestos-free certification (if applicable) | Moderate duty. |
π Conclusion:
- USA has the highest tariff burden (35-41.5%) due to trade policies.
- EU/Japan/Australia have lower duties but stricter chemical regulations (REACH, etc.).
- For US importers, cost optimization through supply chain diversification (e.g., third-country manufacturing) is key.
π VI. Common Mistakes & Pitfalls (Lessons Learned)
β Mistake 1: Declaring as "Plastic Material" without specifying "Unsaturated Polyester"
π Consequence: Customs may classify under a different, higher-duty code or demand additional testing.
β Mistake 2: Ignoring the 10% IEEPA Tariff
π Consequence: Underpayment by 10%. Penalties + Interest. The IEEPA tariff is new and strictly enforced.
β Mistake 3: Mixing Resin and Hardener before shipping
π Consequence: The product may be classified as a "Prepared Resin Composition" with different safety/duty rules, or rejected as HazMat mismatch.
β Mistake 4: Assuming "De Minimis" ($800) applies
π Consequence: Denied. Chemicals from China are excluded from de minimis. Every shipment must clear formal customs.
β Correct Practice:
βUnsaturated Polyester Resin, Liquid, 50% Styrene Content, for Spray Application, UN 1263, Made in Chinaβ
π― VII. Conclusion: Professional Declaration, Save Cost, Avoid Delays!
π― Remember the Mantra:
πΉ βLiquid UPR, Spray Grade, Base 0 or 6.5, Add 25 + 10 = 35 or 41.5!β
πΉ βHazMat Declaration is Mandatory, No De Minimis for China!β
π Pro Tip:
If your UPR is sourced from Vietnam, Malaysia, or Thailand (with substantial transformation), you may qualify for tariff exemption under US trade laws.
Recommend Advance Ruling (PBO) from US Customs (CBP) before shipment.
π£ Immediate Action:
π Contact a licensed customs broker + Provide SDS + Apply for HS Code Pre-Ruling
π Ensure smooth clearance, avoid delays, and protect your profit margins!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every Cent of Tariff Matters in the Chemical Trade!
Customer Reviews
About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.