铸造用粘结剂增稠剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3824100000 | 41.0% | CN | US | Official Doc |
| 3206496050 | 38.1% | CN | US | Official Doc |
| 3206491000 | 40.9% | CN | US | Official Doc |
| 3810905000 | 40.0% | CN | US | Official Doc |
| 3824992900 | 41.5% | CN | US | Official Doc |
AI Analysis
🏭 Foundry Binder & Thickener Agents: The "Glue" of Metal Casting
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Logistics Strategy
📌 I. Product Definition: What Are "Foundry Binders and Thickeners"?
Foundry binders and thickeners are critical chemical additives used in the casting industry to hold sand grains together (for molds and cores) or to modify the viscosity of liquid formulations. Unlike structural adhesives for general construction, these are specialized industrial chemicals designed to withstand high temperatures, pressure, and specific chemical environments during metal pouring.
In international trade, their classification is highly sensitive to their primary function: 1. As Molding Materials: If the product is specifically formulated to bind foundry sand (mold/core making), it falls under Chapter 38. 2. As Coloring/Aggregates: If the product is primarily a pigment, dye, or coloring agent added to the binder, it falls under Chapter 32. 3. As Metal Processing Aids: If it assists in the metalworking process but isn't the mold material itself, it may fall under Chapter 38.10.
⚠️ Key Distinction Point:
- If the product is a "Pre-mixed foundry sand binder" (e.g., resin + catalyst + thickener for sand molding) → HS 3824.
- If the product is a "Pigment/Dye" mixed into a binder for color or identification → HS 3206.
- If the product is a "Metal Processing Aid" (lubricant/cleaning/binder for metal surfaces, not sand) → HS 3810.
📦 II. HS Code Classification Matrix (2026 Latest Tariff Authority)
Based on the provided data, here are the 5 most likely HS Code classifications for "Foundry Binder Thickener", with corresponding tax implications.
| HS Code | Product Description | Application Scenario | Key Characteristic |
|---|---|---|---|
3824.10.00.00 |
Mold/Core Bonding Agents | Pre-mixed binders for sand molding; core making | ✅ Direct Fit: Specifically for making molds/cores |
3824.99.29.00 |
Other Prepared Bonding Agents | General casting binders not specifically named in 3824.10 | ✅ Alternative: For binders not strictly "mold/core" specific |
3206.49.60.50 |
Coloring Agents/Preparations | Dyes/pigments added to binders for marking | ❌ Misclassification Risk: Only if main function is coloring |
3206.49.10.00 |
Concentrated Dispersions | High-pigment load dispersions for coloring | ❌ Misclassification Risk: Purely for color/finish, not bonding |
3810.90.50.00 |
Metal Processing Aids | Binders/lubricants for metal surface treatment | ⚠️ Functional Shift: If not used for sand molds |
🔍 Critical Reminder:
- Do NOT classify pure sand-binders as "Chemicals" (Chapter 38.24 generic) if they fit 3824.10.
- Do NOT classify coloring agents as binders. If the "thickener" is actually a pigment, it goes to 3206.
- 海关归类核心：如果产品主要功能是粘结造型/芯材，归入3824.10或3824.99；如果主要功能是着色，归入3206。
💰 III. 2026 Tariff Rate Breakdown (US Market - China Origin)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: Post-November 2025 (Current Active Rates)
⚠️ Note: All rates below include Base Tariff + Section 301 (25%) + IEEPA (10%).
🎯 1. 3824.10.00.00 —— Mold/Core Bonding Agents (Most Likely)
| Item | Detail |
|---|---|
| Base Tariff | 6.0% |
| Section 301 Tariff | +25.0% |
| IEEPA Tariff (122 Clause) | +10.0% |
| Total Tax Rate | 41.0% |
| Calculation | CIF Value × 41.0% |
| De Minimis Exemption? | ❌ No (High tariff category) |
| Legal Basis | USITC:3824.10.00.00 → Footnote:301 → IEEPA:10% |
📌 Explanation:
- This is the standard classification for most foundry binders.
- Base 6% is relatively low, but the 35% in additional taxes make it expensive.
- Total 41% must be included in your landed cost calculation immediately.
🎯 2. 3824.99.29.00 —— Other Prepared Bonding Agents
| Item | Detail |
|---|---|
| Base Tariff | 6.5% |
| Section 301 Tariff | +25.0% |
| IEEPA Tariff (122 Clause) | +10.0% |
| Total Tax Rate | 41.5% |
| Calculation | CIF Value × 41.5% |
| De Minimis Exemption? | ❌ No |
| Legal Basis | USITC:3824.99.29.00 → Footnote:301 → IEEPA:10% |
📌 Explanation:
- Used if the binder doesn't fit "mold/core" specifically (e.g., general industrial adhesive).
- 0.5% higher than 3824.10. Avoid if 3824.10 applies.
🎯 3. 3206.49.10.00 —— Concentrated Pigment Dispersions (Misclassification Risk)
| Item | Detail |
|---|---|
| Base Tariff | 5.9% |
| Section 301 Tariff | +25.0% |
| IEEPA Tariff (122 Clause) | +10.0% |
| Total Tax Rate | 40.9% |
| Calculation | CIF Value × 40.9% |
| De Minimis Exemption? | ❌ No |
| Legal Basis | USITC:3206.49.10.00 → Footnote:301 → IEEPA:10% |
📌 Explanation:
- Only applies if the product is primarily a coloring agent.
- 40.9% is the lowest total rate in this dataset.
- Warning: Misclassifying a binder as a dye to save 0.1% is a high-risk audit target.
🎯 4. 3810.90.50.00 —— Metal Processing Aids
| Item | Detail |
|---|---|
| Base Tariff | 5.0% |
| Section 301 Tariff | +25.0% |
| IEEPA Tariff (122 Clause) | +10.0% |
| Total Tax Rate | 40.0% |
| Calculation | CIF Value × 40.0% |
| De Minimis Exemption? | ❌ No |
| Legal Basis | USITC:3810.90.50.00 → Footnote:301 → IEEPA:10% |
📌 Explanation:
- If the "binder" is actually a surface treatment agent for metal parts (not sand molds), this code applies.
- 40.0% is the lowest total rate.
- Caution: Must prove it is NOT for sand molding.
🎯 5. 3206.49.60.50 —— Other Coloring Agents
| Item | Detail |
|---|---|
| Base Tariff | 3.1% |
| Section 301 Tariff | +25.0% |
| IEEPA Tariff (122 Clause) | +10.0% |
| Total Tax Rate | 38.1% |
| Calculation | CIF Value × 38.1% |
| De Minimis Exemption? | ❌ No |
| Legal Basis | USITC:3206.49.60.50 → Footnote:301 → IEEPA:10% |
📌 Explanation:
- Lowest total tax (38.1%) in the dataset.
- ONLY applies if the product is purely a coloring agent/dye.
- High Risk: If customs inspectors find it binds sand, they will reclassify to 3824 (+2.9% penalty + retroactive tax).
🛠️ IV. Customs Clearance Practical Guide (Avoiding Pitfalls)
✅ 1. Documentation Checklist (Essential)
| Document | Required? | Description |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Must specify: "Foundry Binder," "Viscosity," "Binding Mechanism," "Sand Ratio" |
| ✅ Safety Data Sheet (SDS) | ✔️ | Required for hazardous chemical clearance. |
| ✅ Product Photo | ✔️ | Show packaging, label, and product form (liquid/powder). |
| ✅ Commercial Invoice | ✔️ | Clearly state: "Prepared Foundry Binder for Sand Molding" OR "Coloring Agent for..." |
| ✅ Certificate of Origin (CO) | ✔️ | For potential tariff mitigation (if available). |
| ✅ Formulation Statement | ✔️ | If asked, provide % composition to prove it's NOT a pure dye. |
✅ 2. Declaration Tips (Key Mnemonics)
🔥 "Bind Sand? 3824. Color? 3206. Aid? 3810. Never Guess!"
| Scenario | Correct HS Code | Incorrect Code | Consequence |
|---|---|---|---|
| Sand Mold Binder | 3824.10.00.00 (41.0%) |
3810.90.50.00 (40.0%) |
Under-declaration penalty if misclassified |
| Pigment/Dye | 3206.49.60.50 (38.1%) |
3824.10.00.00 (41.0%) |
Over-declaration (minor), but high audit risk |
| Metal Surface Aid | 3810.90.50.00 (40.0%) |
3824.10.00.00 (41.0%) |
Risk of being deemed "Mold Binder" |
| Generic Chemical | 3824.99.29.00 (41.5%) |
3824.10.00.00 (41.0%) |
Higher tax, unnecessary |
✅ 3. Special Cases
| Case | Handling Advice |
|---|---|
| Mixed Product (Binder + Dye) | Declare as Binder (3824) if binding is primary function. Declare dye separately if sold as two products. |
| Private Label (OEM) | Provide client’s specification sheet to prove intended use (mold vs. surface treatment). |
| Sample vs. Bulk | Samples under $800 may use Section 321 (de minimis), but high tariff codes are often excluded or scrutinized. Check current US CBP rules. |
| Chemical Registration | Ensure EPA TSCA compliance if exporting to the US. |
🌍 V. Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Base Tariff | US Additional | Total (China) | Remarks |
|---|---|---|---|---|---|
| 🇺🇸 USA | 3824.10.00.00 |
6.0% | +35.0% | 41.0% | High cost. Verify "Mold Binder" classification. |
| 🇨🇳 China | 3824.10.00.00 |
6.0% | 0% | 6.0% | No Section 301. Low cost for domestic use. |
| 🇪🇺 EU | 3824.10.00 |
6.5% | 0% | 6.5% | No IEEPA/301. Standard MFN rate. |
| 🇬🇧 UK | 3824.10.00 |
6.0% | 0% | 6.0% | Post-Brexit, UK has own tariff schedule. |
| 🇯🇵 Japan | 3824.10.00 |
5.0% | 0% | 5.0% | JETP agreements may offer further reductions. |
📌 Conclusion:
- USA is the most expensive market for these products due to Section 301 + IEEPA.
- EU/UK/Japan offer significantly lower duties (5-6.5%).
- Strategy: If possible, route production through Vietnam/Mexico/Thailand to avoid US additional tariffs (verify rules of origin).
📌 VI. Common Errors & Pitfalls (Blood Lessons)
❌ Error 1: Classifying a Sand Binder as a General Adhesive (3506)
👉 Consequence: Wrong code, customs rejection, penalties. Foundry binders are specifically 3824.
❌ Error 2: Classifying a Colored Binder as a Pure Dye (3206) to save tax
👉 Consequence: Customs will test the product. If it binds sand, they will reclassify to 3824.10 (41.0%) + back taxes + fines. 38.1% vs 41.0% is not worth the risk.
❌ Error 3: Ignoring the 122 Clause (IEEPA 10%)
👉 Consequence: Underpaying taxes. Many forget the 10% IEEPA tariff on Chinese goods. Always add 10% to the 25% Section 301.
✅ Correct Declaration:
"Prepared Foundry Binder for Sand Molding, Resin-Based, Viscosity 5000cP, Net Weight 200kg, HS Code 3824.10.00.00, Origin: China"
🎯 VII. Conclusion: Precise Classification Saves Money
🎯 Remember:
🔹 "Bind Sand? 3824. Color? 3206. Aid? 3810."
🔹 "US Tariff = Base + 25% + 10%. Total ~40%+."
🔹 "Misclassification = Audit + Penalties. Be Accurate."
📌 Pro Tip:
If your Foundry Binder is 100% produced in Vietnam, Mexico, or Thailand, you may qualify for 0% Section 301.
Action:
1. Verify Rules of Origin.
2. Apply for Pre-Ruling from US CBP.
3. Profit Margin Protection: Every 1% tariff reduction is pure profit.
📣 Immediate Action:
📞 Contact your freight forwarder.
📄 Provide Technical Data Sheet (TDS).
🚀 Clear Customs Fast, Stay Profitable!
✨ Professional Customs Clearance Starts with Accurate HS Codes!
💼 Your Bottom Line Depends on These Percentages!
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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) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — 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 — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — 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.