Casting Binder Adhesive
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3506990000 | 37.1% | CN | US | Official Doc |
| 3903905000 | 41.5% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3901905501 | 41.5% | CN | US | Official Doc |
| 3506915000 | 37.1% | CN | US | Official Doc |
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AI Analysis
ποΈ Casting Binder Adhesive (Polymer Casting Binders)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: What Exactly is a "Casting Binder"?
Casting Binder Adhesives are specialized polymers used in foundry processes to bind sand grains together for mold and core creation. In international trade, the classification is critical because the tax rate varies significantly depending on whether it is classified as a "Chemical Adhesive" or a "Plastic in Primary Forms."
β οΈ Key Distinction Point:
- If classified as Adhesive (Chapter 35): Lower base tariff (2.1%), Total ~37.1%.
- If classified as Plastic/Polymer (Chapter 39): Higher base tariff (6.5%), Total ~41.5%.
- Material Composition: All options involve Polymers (Styrene, Ethylene, Copolymers), but the legal description differs.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicability | Material/Form | Total Tax Rate |
|---|---|---|---|---|
3506.99.00.00 |
Casting Binder Adhesive classified as Adhesive | General polymer-based binders; no material conflict. | Polymer, Adhesive form | 37.1% |
3903.90.50.00 |
Styrene Polymers | Classified as Styrene Polymer; primary form application. | Primary Form, Styrene-based | 41.5% |
3901.90.90.00 |
Ethylene Polymers | Classified as Ethylene Polymer; primary form. | Primary Form, Ethylene-based | 41.5% |
3901.90.55.01 |
Ethylene Copolymers | Classified as Ethylene Copolymer; fits primary polymer category. | Primary Form, Copolymer | 41.5% |
3506.91.50.00 |
Other Adhesives (Polymer-based) | Classified as Adhesive; determined by "Other Categories." | Polymer, Adhesive form | 37.1% |
π Critical Reminder:
- Adhesive Classification (3506 series) is generally more cost-effective (37.1% total) compared to Polymer Classification (3901/3903 series) (41.5% total).
- The difference lies in the Base Tariff: 2.1% (Adhesive) vs. 6.5% (Polymer).
- All items are subject to additional Section 301 and IEEPA tariffs.
π° III. 2026 Latest Tariff Rate Detailed Breakdown (Including Surcharges & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Time: From November 10, 2025 (including subsequent imports)
π― 1. 3506.99.00.00 & 3506.91.50.00 ββ Classified as Adhesives
| Item | Content |
|---|---|
| Base Tariff | 2.1% (ad valorem) |
| Section 301 Surcharge (Additional Tariff) | +25.0% (USITC Footnote for Chinese goods) |
| Section 122 Tariff | +10.0% (Specific policy surcharge) |
| Total Tax Rate | 37.1% |
| Tax Calculation | CIF Value Γ 37.1% |
| De Minimis Eligibility | β Not Eligible (High tariff rates usually deny de minimis benefits for large volumes, check specific CBP rulings) |
| Legal Basis Path | Base:3506 β Section 301:25% β Section 122:10% |
π Explanation:
- "Base Tariff 2.1%": Standard MFN rate for chemical adhesives.
- "Additional Tariff 25.0%": Under Section 301 of the Trade Act of 1974, targeting Chinese imports.
- "Section 122 Tariff 10%": Specific statutory surcharge applicable to this category.
- Total 37.1%: This is the lower of the two main tax brackets available for this product.
π― 2. 3903.90.50.00 ββ Classified as Styrene Polymers
| Item | Content |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Eligibility | β Not Eligible |
| Legal Basis Path | Base:3903 β Section 301:25% β Section 122:10% |
π Note:
- Higher base rate (6.5%) makes this option 4.4% more expensive than the adhesive classification.
- Applies if the customs authority views the product primarily as a raw plastic material rather than a formulated adhesive.
π― 3. 3901.90.90.00 & 3901.90.55.01 ββ Classified as Ethylene Polymers/Copolymers
| Item | Content |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| Section 122 Tariff | +10.0% |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Eligibility | β Not Eligible |
| Legal Basis Path | Base:3901 β Section 301:25% β Section 122:10% |
π Note:
- Same tax burden as Styrene Polymers.
- Classification depends on the specific polymer type (Ethylene vs. Styrene) and state (Primary form).
- Warning: If the product is a formulated mixture for casting, Chapter 35 (Adhesives) is often the more defensible and cheaper argument than Chapter 39 (Raw Plastics), unless it is sold strictly as a raw polymer resin.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance Guide)
β 1. Documentation Checklist (Essential)
| Document | Required | Explanation |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must detail chemical composition, polymer type (Styrene/Ethylene), and binding mechanism. |
| β Certificate of Analysis (COA) | βοΈ | Proves it is a formulated adhesive vs. raw polymer resin. |
| β Commercial Invoice | βοΈ | Clearly state "Casting Binder Adhesive, Polymer-based". Avoid vague terms like "Plastic Resin" if claiming Chapter 35. |
| β Packaging List | βοΈ | Show net/gross weight accurately for CIF calculation. |
| β Origin Certificate (CO) | βοΈ | Confirm Chinese origin to apply/verify surcharges. |
| β Safety Data Sheet (SDS) | βοΈ | Required for hazardous material screening during customs inspection. |
β 2. Declaration Strategy (Key Mantra)
π₯ βClassify as Adhesive, Base Rate Lower, 37.1% Total, Save the Money!β
| Scenario | Correct Declaration | Wrong Approach |
|---|---|---|
| Formulated Binder | 3506.99.00.00 or 3506.91.50.00 |
Misdeclare as 3901/3903 β +4.4% extra tax |
| Raw Polymer Resin | 3901.90.90.00 or 3903.90.50.00 |
Misdeclare as Adhesive β Classification Error Risk |
| Mixed Container | Separate HS Codes | Combined declaration β Customs Rejection |
| Vague Description | "Polymer Casting Binder" | "Plastic Glue" β Delay for Inspection |
β 3. Special Case Handling
| Situation | Handling Advice |
|---|---|
| OEM Private Label | Provide customer PO + spec sheet to prove it is a specific adhesive formulation. |
| Liquid vs. Solid | Ensure description matches physical state. Liquid binders often fall under 3506.99. |
| Chemical Composition Change | If polymer type changes (e.g., from Styrene to Ethylene), update HS Code accordingly. |
| Customs Audit | Have a lab report ready to prove it is a "ready-to-use adhesive" and not a raw plastic material. |
π V. Global Main Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3506.99.00.00 (Adhesive) |
37.1% | SDS Required | 41.5% if classified as Polymer (3901/3903). Adhesive is cheaper. |
| π¨π³ China | 3506.99.00.00 |
~5-7% | None | Lower base tariff, no Section 301/122. |
| πͺπΊ EU | 3506.99 |
~6.5% | REACH Registration | No 25% surcharge. |
| π¬π§ UK | 3506.99 |
~6.5% | UK REACH | Post-Brexit rules apply. |
| π―π΅ Japan | 3506.99 |
~4-6% | JIS Standard | Generally low tariff. |
π Conclusion:
- USA is the most complex market due to the 25% Section 301 + 10% Section 122 surcharges.
- Choosing Chapter 35 (Adhesive) saves 4.4% compared to Chapter 39 (Polymer).
- China, EU, and other markets do not have these punitive surcharges, making the total cost significantly lower.
π VI. Common Errors & Pitfall Avoidance (Blood & Tears Lessons)
β Error 1: Declaring "Casting Binder" as "Raw Plastic Resin" (3901)
π Consequence: 41.5% tax instead of 37.1% β Loss of profit margin.
β Error 2: Using vague descriptions like "Glue" or "Plastic"
π Consequence: Customs delays, manual inspection, potential reclassification penalty.
β Error 3: Ignoring Section 122 Tariff
π Consequence: Underpayment of 10% surcharge β Back taxes + Interest + Fines.
β Error 4: Not providing SDS/COA
π Consequence: Shipment held at port for chemical safety review.
β Correct Approach:
"Polymer-Based Casting Binder Adhesive, Liquid, For Sand Molds, Chemical Composition: [Details], SDS Attached"
π― VII. Conclusion: Professional Declaration, Save Time & Money!
π― Remember the Mantra:
πΉ "Adhesive = 37.1%, Polymer = 41.5%, Save 4.4%! Don't Let Raw Material Classification Kill Your Margin!"
πΉ "HS Code Determines Destiny, 4.4% Difference, Declare Correctly, Save Thousands!"
π Pro Tip:
If your product is a formulated mixture designed for binding, argue strongly for Chapter 35 (Adhesives). Only use Chapter 39 if you are shipping pure raw polymer resins.
Apply for Advance Rulings from CBP if the chemical nature is complex to avoid post-import audits.
π£ Immediate Action:
π Contact Professional Customs Broker + Provide Product Specs + Apply for HS Code Advance Ruling
π Let your Casting Binder Clear Customs Smoothly, Maximize Profit!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every Cent of Cost Deserves Precise Calculation!
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.