Binder Concentrate for Casting
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3903901000 | 41.5% | CN | US | Official Doc |
| 3506915000 | 37.1% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3901905501 | 41.5% | CN | US | Official Doc |
| 3903905000 | 41.5% | CN | US | Official Doc |
AI Analysis
π Binder Concentrate for Casting
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: Do You Really Understand "Polymer Casting Binder"?
Binder Concentrate for Casting (often referred to as polymer casting binders) is a critical material used in foundry processes, specifically for sand casting, shell molding, and investment casting. In international trade, its classification depends heavily on its chemical composition (polymer type), physical state (primary shape vs. ready-to-use), and specific application.
β οΈ Key Distinction:
- If the binder is a raw polymer (primary shape) like styrene or ethylene polymers used as a base material β Classified under Chapter 39 (Plastics).
- If it is a prepared adhesive or binder classified under other headings β Classified under Chapter 35 (Albuminoidal substances; modified starches; glues).
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Tax Rate (Total) |
|---|---|---|---|
3903.90.10.00 |
Binder Concentrate for Casting, Material: Styrene Polymer, Form: Primary Shape | Styrene-based raw polymer for casting sands | 41.5% |
3506.91.50.00 |
Binder Concentrate for Casting, Material: Polymer, Use: Adhesive, Inferred by Other Category | Prepared adhesives/binders classified under "Other" | 37.1% |
3901.90.90.00 |
Binder Concentrate for Casting, Material: Ethylene Polymer, Form: Primary Shape | Ethylene-based raw polymer for casting sands | 41.5% |
3901.90.55.01 |
Binder Concentrate for Casting, Material: Ethylene Copolymer, Form: Primary Shape | Ethylene copolymer raw material for casting | 41.5% |
3903.90.50.00 |
Binder Concentrate for Casting, Material: Styrene Polymer, Form: Primary Shape | Styrene-based polymer (different subtype from .10) | 41.5% |
π Key Reminder:
- All Styrene and Ethylene polymers in primary shape (resins, granules, powders) fall under Chapter 39.
- The adhesive-specific category (3506.91.50.00) applies when the product is formulated specifically as an adhesive/binder ready for use, rather than a raw polymer.
- Tax rates differ significantly: 41.5% vs. 37.1% β choosing the wrong code can lead to overpayment or customs delays.
π° III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Time: 2025 November 10 onwards (including subsequent imports)
π― 1. 3903.90.10.00 & 3903.90.50.00 β Styrene Polymer Binding Agents (Primary Shape)
| Item | Details |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surtax | +25% (from USITC Footnote 9903.88.01) |
| IEEPA Surtax | +10% (Targeting China/Hong Kong products, from Nov 10, 2025) |
| Total Tariff | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3903.90.10.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- The 25% surtax is imposed under Section 301 of the Trade Act for certain Chinese plastic products.
- The 10% IEEPA surtax is a new additional levy targeting Chinese-origin goods under the International Emergency Economic Powers Act.
- Total 41.5% is a high tariff rate, requiring advance cost planning.
π― 2. 3901.90.90.00 & 3901.90.55.01 β Ethylene Polymer Binding Agents (Primary Shape)
| Item | Details |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 41.5% |
| Tax Calculation | CIF Γ 41.5% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3901.90.90.00 β FOOTNOTE:9903.88.01 |
π Note:
- Same as styrene polymers, ethylene-based primary shape polymers are subject to the same surtax structure.
- Whether it is pure ethylene or ethylene copolymer, the tariff remains 41.5%.
π― 3. 3506.91.50.00 β Prepared Polymer Adhesives/Binders
| Item | Details |
|---|---|
| Base Tariff | 2.1% (ad valorem) |
| Section 301 Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff | 37.1% |
| Tax Calculation | CIF Γ 37.1% |
| De Minimis Exemption | β Not Eligible |
| Legal Basis Path | IEEPA:9901.25 β IEEPA:9903.01.24 β USITC:3506.91.50.00 β FOOTNOTE:9903.88.01 |
π Advantage:
- This is the lowest total tariff (37.1%) among all listed HS codes.
- Applicable when the product is classified as a prepared adhesive rather than a raw polymer.
- Crucial: Must prove that the product is not a raw polymer but a formulated adhesive/binder.
π οΈ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
β 1. Required Document Checklist (All Mandatory)
| Document | Required | Explanation |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must detail polymer type (Styrene/Ethylene), form (primary/prepared), and casting application |
| β Safety Data Sheet (SDS) | βοΈ | To confirm chemical composition and safety handling |
| β Product Photos (Label & Package) | βοΈ | Clear view of brand, model, and "Polymer" or "Adhesive" designation |
| β Commercial Invoice | βοΈ | Must explicitly state "Polymer Casting Binder" and material composition |
| β Certificate of Origin (CO) | βοΈ | Required for surtax determination (China-origin triggers 35%+ taxes) |
| β Packing List | βοΈ | Details net/gross weight, ensuring no mixed shipments |
β 2. Declaration Tips (Key Mantras)
π₯ "Polymer Primary Shape = 41.5%, Prepared Adhesive = 37.1%! Declare Material Correctly!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Raw Styrene/Ethylene Resins | 3903.90.10.00 or 3901.90.90.00 |
Misdeclare as "Adhesive" β Risk of rejection/audit |
| Formulated Casting Binder (Ready-to-use) | 3506.91.50.00 |
Misdeclare as "Raw Polymer" β Overpay 4.4% |
| Mixed Polymer Types | Clarify in specs | Vague description "Binder" β Customs delay |
| Sample Shipments | Full tariff applies | Assume de minimis exemption β Penalty! |
β 3. Special Case Handling
| Scenario | Handling Advice |
|---|---|
| OEM Custom Binders | Provide customer specs + formulation details to justify 3506.91.50.00 if applicable |
| Blend of Polymers | Declare dominant polymer; if mixed, consult customs broker for correct subheading |
| Casting Sand Mixtures | If binder is pre-mixed with sand, it may be classified differently β do not combine |
| Non-Chinese Origin | If from Vietnam/Malaysia, no 301/IEEPA surtax β Tariff drops to base rate only |
π V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3903.90.10.00 / 3506.91.50.00 |
41.5% / 37.1% | None specific | Highest global surtax |
| π¨π³ China | 3903.90.10.00 |
41.5% (Import) | None | Low import volume |
| πͺπΊ EU | 3903.90 |
6.5% | REACH Compliance | No 301/IEEPA surtax |
| π¬π§ UK | 3903.90 |
6.5% | UKCA Mark | Post-Brexit rules apply |
| π―π΅ Japan | 3903.90 |
6.0% | JIS Standard | Low tariff, high quality standards |
π Conclusion:
- USA is the most expensive market for polymer casting binders due to 35% additional surtaxes.
- EU/UK/Japan offer significantly lower tariffs (6-7%) but require strict chemical compliance (REACH/JIS).
- Strategic Suggestion: For US-bound goods, consider formulating as "Prepared Adhesive" (3506.91.50.00) to save 4.4% in tariffs.
π VI. Common Mistakes & Pitfall Avoidance (Lessons Learned)
β Mistake 1: Declaring raw polymer resins as "Adhesives" to avoid surtax
π Consequence: Customs audit β Back taxes + penalties + shipment hold
β Mistake 2: Omitting "Primary Shape" in description
π Consequence: Customs cannot verify classification β Delay in release
β Mistake 3: Assuming de minimis exemption for samples
π Consequence: Denied entry β surtaxes apply regardless of value
β Mistake 4: Using vague term "Binder" without material specification
π Consequence: Customs assigns highest possible tariff β Overpayment
β Correct Practice:
"Styrene Polymer, Primary Shape, for Sand Casting, Form: Granules, Model: BND-100, Made in China"
π― VII. Conclusion: Professional Declaration, Cost Savings, Efficient Clearance
π― Remember the Mantra:
πΉ "Primary Shape = 41.5%, Prepared Adhesive = 37.1%, Vague Description = Delayed!"
πΉ "HS Code Determines Cost, Declaration Precision Saves Money, Customs Compliance Ensures Speed!"
π Pro Tip:
If your binders are originating from Vietnam, Mexico, Malaysia, or Thailand, you can avoid IEEPA/301 surtaxes entirely. Tariffs drop to base rate only (6-7%).
Consider supply chain diversification or formulation adjustment to qualify for lower tariff categories.
π£ Immediate Action:
π Contact a licensed customs broker + Provide detailed specs + Apply for Advance Ruling
π Ensure your polymer casting binders clear customs smoothly, reduce costs, and maximize profits!
β¨ Professional Clearance Starts with Precise Classification!
πΌ Every Dollar Saved is a Dollar Earned!
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.