低粘度铸造粘结剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3909505000 | 41.3% | CN | US | Official Doc |
| 3909400000 | 41.5% | CN | US | Official Doc |
| 3810905000 | 40.0% | CN | US | Official Doc |
| 3810902000 | 35.0% | CN | US | Official Doc |
| 3506990000 | 37.1% | CN | US | Official Doc |
Product Images
AI Analysis
🏭 Low Viscosity Casting Binder (Low Viscosity Foundry Binder)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is a "Low Viscosity Casting Binder"?
A Casting Binder (also known as Foundry Binder) is a crucial additive in metal casting processes. It binds sand particles together to form molds and cores that can withstand the high temperature and pressure of molten metal.
Key Characteristic: "Low Viscosity" * Physical State: Liquid or semi-liquid. * Chemical Nature: Typically composed of Resins (Phenolic, Amino, Polyurethane) or inorganic compounds (Sodium Silicate/Water Glass), often mixed with solvents or catalysts. * Function: Adhesion/Bonding agent for industrial casting.
⚠️ Critical Classification Conflict:
The classification depends heavily on whether the binder is viewed as a raw resin material (Chapter 39) or a prepared chemical/adhesive preparation (Chapter 35/38).
- If it's essentially a pure resin form → Chapter 39
- If it's a mixture/preparation specifically for binding/adhesion → Chapter 35 or 38
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Matching Logic from Data | Applicable Scenario |
|---|---|---|---|
| 3909.50.50.00 | Other amino-resins, polyesters, polyethers, epoxy resins, and polyurethanes in primary forms. | Inferred Component: "Binder" implies a resin core. Matches characteristics of Polyurethane/Amino Resins. No material/form conflict. | Pure resin-based binders (e.g., PU, Amino) in primary form. |
| 3909.40.00.00 | Phenol-resins, alkyl-resins, polyacetals, and other polyethers in primary forms. | Material Logic: Foundry binders are often Phenolic or Amino resins. Matches the material logic of Phenolic resins. | Phenolic resin-based cast binders. |
| 3810.90.50.00 | Other prepared additives for metalworking (excluding welding/ brazing fluxes). | Usage Inference: Treated as a "Chemical Preparation." Fits the category of "Other Auxiliary Preparations." No conflict with metalworking usage. | Complex chemical mixtures used as auxiliary agents in metal processing. |
| 3810.90.20.00 | Other prepared additives for metalworking, fully composed of inorganic substances. | Material Inference: Inferred to contain inorganic components. Matches the "fully inorganic" fallback requirement. | Inorganic binders (e.g., Sodium Silicate solutions). |
| 3506.99.00.00 | Other prepared glues and adhesives, not elsewhere specified. | Product Type: Classified as "Prepared Chemical Binder." Fits "Other Prepared Adhesives." Matches chemical synthesis/preparation nature. | General prepared adhesive binders not falling into specific resin or inorganic categories. |
🔍 Key Insight:
- Resin-based (39xx): If the binder is primarily a specific resin (Phenolic, Epoxy, PU) in its primary chemical form, it goes to Chapter 39.
- Preparation/Mixture (38xx/35xx): If it's a formulated mixture, solvent-based, or inorganic, it falls under Chapter 38 (Metalworking additives) or Chapter 35 (Adhesives).
- Low Viscosity implies it is a liquid preparation, which often leans towards Chapter 38 or 35 unless it is a pure liquid resin.
💰 III. 2026 Latest Tariff Rate Detailed Breakdown (Including Surcharges, Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: November 10, 2025 onwards (Includes subsequent imports)
🎯 1. 3909.50.50.00 —— Amino-Resins/Polyurethanes in Primary Forms
| Item | Content |
|---|---|
| Base Tariff | 6.3% |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Effective Rate | 41.3% |
| Tax Calculation | CIF Value × 41.3% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Pathway | Base: 6.3% → Section 301: 25% → IEEPA: 10% |
📌 Explanation:
- High tariff due to being classified as a chemical resin from China. - The combination of base, 301, and IEEPA surcharges results in a significant cost burden.
🎯 2. 3909.40.00.00 —— Phenol-Resins in Primary Forms
| Item | Content |
|---|---|
| Base Tariff | 6.5% |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Effective Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Pathway | Base: 6.5% → Section 301: 25% → IEEPA: 10% |
📌 Note:
- Phenolic resins are common in casting. The rate is slightly higher than urethanes/amino due to a higher base rate (6.5% vs 6.3%). - Still subject to maximum US surcharges.
🎯 3. 3810.90.50.00 —— Other Prepared Additives for Metalworking
| Item | Content |
|---|---|
| Base Tariff | 5.0% |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Effective Rate | 40.0% |
| Tax Calculation | CIF Value × 40.0% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Pathway | Base: 5.0% → Section 301: 25% → IEEPA: 10% |
📌 Explanation:
- Lower base rate (5.0%) compared to resins. - Classified as an "auxiliary preparation" rather than a raw material.
🎯 4. 3810.90.20.00 —— Inorganic Prepared Additives for Metalworking
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Effective Rate | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Pathway | Base: 0.0% → Section 301: 25% → IEEPA: 10% |
📌 Critical Advantage:
- Zero Base Tariff! This is the lowest total tariff among the options if the product can be legitimately classified as fully inorganic. - Ideal for Sodium Silicate (Water Glass) based binders.
🎯 5. 3506.99.00.00 —— Other Prepared Adhesives
| Item | Content |
|---|---|
| Base Tariff | 2.1% |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge (Section 122) | +10.0% |
| Total Effective Rate | 37.1% |
| Tax Calculation | CIF Value × 37.1% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Pathway | Base: 2.1% → Section 301: 25% → IEEPA: 10% |
📌 Note:
- Falls under the general "Adhesive" category. - Base rate is moderate (2.1%), making it more expensive than inorganic additives but cheaper than pure resins.
🛠️ IV. Customs Clearance Practical Advice (Real-World Pitfall Guide)
✅ 1. Required Documentation List (Non-Negotiable)
| Document | Must Provide | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must specify viscosity, chemical composition (Resin vs. Inorganic), and curing agent. |
| ✅ Safety Data Sheet (SDS) | ✔️ | Critical for chemical classification. Shows UN number, hazardous material status. |
| ✅ Formula/Composition Details | ✔️ | % of active ingredients vs. solvents. Needed to distinguish between "Resin" (Ch 39) and "Preparation" (Ch 38/35). |
| ✅ Photos (Bottle/Label) | ✔️ | Clear view of hazard symbols, batch numbers, and product name. |
| ✅ Commercial Invoice | ✔️ | Must state "Low Viscosity Casting Binder" and HS Code. |
| ✅ Certificate of Origin (CO) | ✔️ | To prove China origin (triggering surcharges). |
✅ 2. Declaration Strategy (Key Mantra)
🔥 “Chemistry Defines the Code, Inorganic Saves Money, Resin Costs More, Adhesive is the Fallback!”
| Scenario | Correct Declaration | Error to Avoid |
|---|---|---|
| Pure Phenolic/PU/Amino Resin | 3909.40.00.00 or 3909.50.50.00 |
Misdeclaring as "Adhesive" to avoid 41%? Risky, CBP may reassess. |
| Sodium Silicate (Water Glass) | 3810.90.20.00 |
Declaring as resin → 41.5% instead of 35%. |
| Complex Liquid Mixture (Metalworking Aid) | 3810.90.50.00 |
Declaring as raw chemical → Over-taxed. |
| General Glue/Binder | 3506.99.00.00 |
Using vague names like "Liquid Glue" without SDS → Delay. |
✅ 3. Special Situation Handling
| Situation | Handling Advice |
|---|---|
| Contains Solvents | If >50% solvent by weight, it may not be considered "primary form resin" (Ch 39). Lean towards Ch 38/35. |
| Pre-Mixed with Hardener | If sold as a two-component system, declare the binder separately. Mixed systems may be classified as prepared preparations. |
| Hazardous Chemicals | Low viscosity often implies volatile solvents. Ensure UN Number and Hazmat Declaration are correct to avoid port rejection. |
| Small Sample Shipments | Even small quantities are subject to 301/IEEPA surcharges. De Minimis does NOT apply. |
🌍 V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Total Tariff (China Origin) | Certification/Notes |
|---|---|---|---|
| 🇺🇸 USA | 3810.90.20.00 (Best Case) |
35.0% | High scrutiny on chemical composition. |
| 🇺🇸 USA | 3909.40.00.00 (Resin) |
41.5% | Common for Phenolic binders. |
| 🇨🇳 China | 3810.90.20.00 |
0% | No import tariff for domestic use. |
| 🇪🇺 EU | 3824.99 (General) |
~6.5% | No Section 301 equivalent. |
| 🇯🇵 Japan | 3824.99 |
~6.0% | Lower base rates. |
📌 Conclusion:
- The USA imposes the highest effective tariffs due to the叠加 (stacking) of Base + 301 + IEEPA. - Inorganic binders (3810.90.20.00) offer the lowest tariff at 35%. - Resin-based binders (3909.xx) are the most expensive at ~41%.
📌 VI. Common Errors & Pitfalls (Lessons Learned)
❌ Error 1: Calling it "Glue" to avoid chemical scrutiny.
👉 Consequence: CBP may classify it as a chemical prep and demand SDS/Formulation. If it's resin, they revert to Ch 39.
❌ Error 2: Misclassifying Sodium Silicate as a Resin (3909).
👉 Consequence: Overpayment of 6.5% tariff ($6.50 per $100 value). Huge margin eroder in bulk imports.
❌ Error 3: Ignoring IEEPA 10% Surcharge.
👉 Consequence: Under-declaring tariff liability leads to penalties and interest upon audit.
❌ Error 4: Vague Description: "Foundry Chemicals".
👉 Consequence: Customs Delay. CBP will ask for detailed composition. Provide it upfront.
✅ Correct Practice:
"Low Viscosity Casting Binder, Phenolic Resin Based, Liquid, UN1230, For Metal Molding, Model XYZ"
🎯 VII. Conclusion: Professional Classification Saves Money!
🎯 Remember the Mantra:
🔹 "Inorganic is King (35%), Resin is Queen (41%), Adhesive is Prince (37%)."
🔹 "Check the Formula First, Then Pick the Code. Wrong Code = Wrong Tax!"
📌 Pro Tip:
If your product is 100% Inorganic (e.g., Sodium Silicate), insist on 3810.90.20.00. It saves you 6.5% compared to resin classifications.
For complex organic binders, ensure you have a robust SDS and Formula ready to justify 3810.90.50.00 or 3506.99.00.00 if they don't meet strict "primary form resin" definitions.
📣 Immediate Action:
📞 Consult your Customs Broker with the full chemical formula.
🚀 Apply for an Advance Ruling if importing large volumes to lock in the 35% or 40% rate.
💼 Your Margin Depends on Precise Classification!
✨ Professional Clearance Starts with Accurate HS Codes!
💼 Every Percent of Tax Saved is Profit 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) — 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.