Rubber Additive Liquid
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3812399000 | 40.0% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3506990000 | 37.1% | CN | US | Official Doc |
| 3506915000 | 37.1% | CN | US | Official Doc |
| 3812105000 | 40.0% | CN | US | Official Doc |
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π§ͺ Rubber Additive Liquid (Industrial Chemicals)
π HS Code Classification & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Strategy
π I. Product Definition & Chemical Nature: Do You Know Your "Liquid"?
Rubber Additive Liquid refers to liquid chemical substances used in the rubber manufacturing process to enhance properties such as viscosity, adhesion, curing speed, or durability. Unlike solid rubber modifiers, these liquids are often pre-mixed formulations, polymer solutions, or specialized chemical aids.
β οΈ Key Classification Divergence:
The HS Code depends entirely on the chemical composition and function of the liquid:
- Is it a simple thickener mixed with rubber? β Chapter 38
- Is it a pure polymer (e.g., ethylene-based)? β Chapter 39
- Is it a complex pre-mixed chemical aid/adhesive? β Chapter 35
π¦ II. HS Code Classification Details (2026 Latest Tariff Reference)
| HS Code | Product Description | Application Scenario | Chemical Nature |
|---|---|---|---|
3812.39.90.00 |
Rubber thickeners, matching rubber materials & chemical additives | General rubber compounding, viscosity adjustment | Mixture/Additive |
3901.90.90.00 |
Rubber thickeners, matching ethylene polymer raw materials | Ethylene-based polymer solutions | Pure Polymer |
3506.99.00.00 |
Rubber thickeners, matching pre-mixed chemical aids | Complex pre-mixed chemical blends | Pre-mixed Aid |
3506.91.50.00 |
Rubber thickeners, matching rubber-related polymer adhesives | Adhesive bonding, polymer-based glue | Polymer Adhesive |
3812.10.50.00 |
Rubber thickeners, matching other chemical additives | Other specialized chemical functions | Other Additive |
π Critical Distinction:
- Chapter 39 (3901.90.90.00) applies only if the product is a pure polymer (e.g., polyethylene solution).
- Chapter 35 (3506.99.50.00 / 3506.91.50.00) applies if it is a pre-mixed chemical aid or adhesive.
- Chapter 38 (3812.39.90.00 / 3812.10.50.00) applies if it is a preparation/mixture not elsewhere specified, typically for rubber processing.
π° III. 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Date: 2025 November 10 (inclusive of subsequent imports)
π¨ Warning: All items below are subject to Section 301 Tariffs and IEEPA Tariffs.
π― 1. 3812.39.90.00 ββ Rubber Thickeners (Matching Rubber Materials & Chemical Additives)
| Item | Content |
|---|---|
| Base Tariff | 5.0% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| 122 Clause Tariff | +10.0% |
| Total Tariff Rate | 40.0% |
| Tax Calculation | CIF Value Γ 40.0% |
| De Minimis Exemption | β Denied (deny_de_minimis) |
| Legal Basis Path | Base: 3812.39.90.00 β Section 301: +25% β 122 Clause: +10% |
π Explanation:
- This is the most common classification for generic rubber processing additives.
- Total Cost Impact: For a $10,000 shipment, you pay $4,000 in duties.
- No De Minimis: Cannot use Section 321 (800 USD) exemption. Must file formally.
π― 2. 3901.90.90.00 ββ Rubber Thickeners (Matching Ethylene Polymer Raw Materials)
| Item | Content |
|---|---|
| Base Tariff | 6.5% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| 122 Clause Tariff | +10.0% |
| Total Tariff Rate | 41.5% |
| Tax Calculation | CIF Value Γ 41.5% |
| De Minimis Exemption | β Denied (deny_de_minimis) |
| Legal Basis Path | Base: 3901.90.90.00 β Section 301: +25% β 122 Clause: +10% |
π Explanation:
- Applies if the liquid is primarily an ethylene polymer (e.g., dissolved polyethylene).
- Highest Total Rate: 41.5% is the most expensive option among the list.
- Strict Documentation: Must provide MSDS and chemical composition proof to confirm it is NOT a mixture (which would fall under Ch 38).
π― 3. 3506.99.00.00 ββ Rubber Thickeners (Matching Pre-mixed Chemical Aids)
| Item | Content |
|---|---|
| Base Tariff | 2.1% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| 122 Clause Tariff | +10.0% |
| Total Tariff Rate | 37.1% |
| Tax Calculation | CIF Value Γ 37.1% |
| De Minimis Exemption | β Denied (deny_de_minimis) |
| Legal Basis Path | Base: 3506.99.00.00 β Section 301: +25% β 122 Clause: +10% |
π Explanation:
- Applies to pre-mixed chemical preparations not specified elsewhere.
- Lowest Base Tariff: Only 2.1% base, but surcharges push it to 37.1%.
- Documentation: Must prove it is a "pre-mixed aid" and not a pure chemical substance.
π― 4. 3506.91.50.00 ββ Rubber Thickeners (Matching Rubber-Related Polymer Adhesives)
| Item | Content |
|---|---|
| Base Tariff | 2.1% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| 122 Clause Tariff | +10.0% |
| Total Tariff Rate | 37.1% |
| Tax Calculation | CIF Value Γ 37.1% |
| De Minimis Exemption | β Denied (deny_de_minimis) |
| Legal Basis Path | Base: 3506.91.50.00 β Section 301: +25% β 122 Clause: +10% |
π Explanation:
- Specifically for polymer adhesives used in rubber bonding.
- If your product is marketed as a "Rubber Glue" or "Adhesive Liquid," this is likely the correct code.
- Same total rate as3506.99.00.00.
π― 5. 3812.10.50.00 ββ Rubber Thickeners (Matching Other Chemical Additives)
| Item | Content |
|---|---|
| Base Tariff | 5.0% (ad valorem) |
| Section 301 Surcharge | +25.0% |
| 122 Clause Tariff | +10.0% |
| Total Tariff Rate | 40.0% |
| Tax Calculation | CIF Value Γ 40.0% |
| De Minimis Exemption | β Denied (deny_de_minimis) |
| Legal Basis Path | Base: 3812.10.50.00 β Section 301: +25% β 122 Clause: +10% |
π Explanation:
- Catch-all for other chemical additives in rubber processing.
- Identical total rate to3812.39.90.00(40.0%).
- Use this if the product does not fit the "matching rubber materials" description of3812.39.90.00.
π οΈ IV. Customs Clearance Practical Advice (Avoid Pitfalls)
β 1. Required Documentation Checklist (Non-Negotiable)
| Document | Required | Purpose |
|---|---|---|
| β MSDS / SDS | βοΈ | Proves chemical composition, hazard class, and whether it's a polymer or mixture. |
| β Formula Composition | βοΈ | Detailed % of each component to justify HS Code (Pure Polymer vs. Mixture). |
| β Product Specifications | βοΈ | Describes function (e.g., "Thickener," "Adhesive," "Additive"). |
| β Commercial Invoice | βοΈ | Must clearly state "Rubber Additive Liquid" and HS Code. |
| β Packing List | βοΈ | Shows volume, net weight, and gross weight. |
| β Certificate of Origin | βοΈ | Required for tariff verification. |
β 2. Declaration Tips (Key Mantra)
π₯ "Formula Defines Code, Mixture vs. Pure Matters!"
| Scenario | Correct HS Code | Mistake to Avoid |
|---|---|---|
| Pure Ethylene Polymer Solution | 3901.90.90.00 (41.5%) |
Misdeclaring as "Mixture" to get lower base rate (but surcharges make it higher anyway!) |
| Pre-mixed Chemical Aid | 3506.99.00.00 (37.1%) |
Declaring as "Pure Chemical" β Customs may reject. |
| Rubber Bonding Adhesive | 3506.91.50.00 (37.1%) |
Declaring as "General Additive" β No impact on rate, but good for accuracy. |
| Generic Thickener Mixture | 3812.39.90.00 (40.0%) |
Most common. Ensure "Rubber" function is explicit. |
β 3. Special Case Handling
| Situation | Recommendation |
|---|---|
| OEM Custom Liquid | Provide client order + technical data sheet. |
| Liquid in Drums vs. Small Packets | Both are subject to 40%+ tariffs. No de minimis exemption! |
| Hazardous Chemicals | If MSDS shows flammability/corrosivity, additional DOT/EPA regulations may apply. |
| Dual-Use Items | If used in both rubber and plastic, ensure documentation specifies rubber application to justify Ch 38/35. |
π V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3812.39.90.00 |
40.0% | No special certs | Highest impact: Section 301 + 122 Clause. |
| π¨π³ China | 3812.39.90.00 |
5.0% | None | Low domestic tariff. |
| πͺπΊ EU | 3812.39.90.00 |
4.5% | REACH Registration | No US-style surcharges. Much cheaper. |
| π²π½ Mexico | 3812.39.90.00 |
0% (T-MEC) | None | Best Alternative: Shift supply chain to Mexico for US export. |
| π»π³ Vietnam | 3812.39.90.00 |
0% (EVFTA) | None | Best Alternative: Shift supply chain to Vietnam. |
π Conclusion:
- USA is the only major market with punitive 40%+ tariffs on these goods.
- EU, China, and Asia-Pacific have low or zero tariffs.
- Strategic Recommendation: If exporting to the US, consider tariff engineering (reclassifying if possible) or supply chain relocation to Mexico/Vietnam to avoid Section 301 and 122 Clause surcharges.
π VI. Common Mistakes & Pitfalls (Blood Tears Lessons)
β Mistake 1: Assuming small shipments qualify for De Minimis (Section 321)
π Consequence: Customs will deny entry and charge full 40%+ duties + storage fees.
Rule: All chemical additives from China are
deny_de_minimis.
β Mistake 2: Misdeclaring "Polymer Solution" as "Chemical Mixture" to lower base rate
π Consequence: If found to be a mixture, it may be reclassified, but surcharges apply regardless. Better to be accurate.
β Mistake 3: Ignoring MSDS Requirements
π Consequence: If chemicals are hazardous (flammable, corrosive), additional Dangerous Goods (DG) fees and inspections will delay shipment by 2-4 weeks.
β Mistake 4: Not specifying "Rubber" function in description
π Consequence: Customs may classify under general chemical codes with higher scrutiny or different duties.
β Correct Practice:
"Liquid Rubber Thickener, Chemical Mixture, 20L Drum, Non-Hazardous, HS 3812.39.90.00, Made in China"
π― VII. Conclusion: Professional Declaration, Cost Savings, Efficiency!
π― Remember the Mantra:
πΉ "Base Tariff Low, Surcharges High, 40% is the Floor!"
πΉ "Pure Polymer = 41.5%, Mixture = 37-40%, No Exemptions!"
π Pro Tip:
If your product can be technically justified as a polymer adhesive (3506.91.50.00) or pre-mixed aid (3506.99.00.00), you save 0.4-2.9% compared to the generic rubber additive codes. Documentation is key to proving this classification.
π£ Immediate Action:
π Consult a customs broker before shipping.
π Prepare detailed MSDS and Formulation.
π Consider Mexico/Vietnam for US-bound goods to eliminate surcharges.
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every Percent of Duty Saved is Pure Profit!
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.