丁基橡胶原料
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 4002310000 | 35.0% | CN | US | Official Doc |
| 4002390000 | 35.0% | CN | US | Official Doc |
| 4016935020 | 37.5% | CN | US | Official Doc |
| 4014901000 | 10.0% | CN | US | Official Doc |
| 4016931020 | 37.5% | CN | US | Official Doc |
Product Images
AI Analysis
🧪 Butyl Rubber Raw Materials (丁基橡胶原料)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Breakdown | Professional Entry Strategy
📌 I. Product Definition & Classification: Do You Really Understand "Butyl Rubber"?
Butyl rubber (Ibutylene-isoprene rubber) is a synthetic rubber known for its low gas permeability, excellent weather resistance, and chemical stability. In international trade, it is primarily categorized by its form and processing stage:
- Unvulcanized Raw Rubber: The primary polymer原料 used as the base material for further manufacturing. This falls under Chapter 40, Heading 40.02.
- Semi-Finished or Finished Articles: Seals, gaskets, or membranes made from butyl rubber. These fall under Chapter 40, Heading 4014 or 4016.
⚠️ Key Distinction Point:
- If the product is raw polymer granules/powder used as an ingredient →归入 4002.31.00.00 / 4002.39.00.00
- If the product is formed seals/gaskets (e.g., tire inner liners, medical stoppers) →归入 4016.93.50.20 / 4014.90.10.00 / 4016.93.10.20
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Application Scenario | Material Form |
|---|---|---|---|
4002.31.00.00 |
Butyl rubber (Isobutylene-isoprene), primary form | Raw polymer material for tire inner liners, pharmaceutical stoppers | ✅ Unvulcanized Raw Material |
4002.39.00.00 |
Other Butyl rubber, primary form | Raw material under "Other" category if not specifically 4002.31 | ✅ Unvulcanized Raw Material |
4016.93.50.20 |
Other articles of vulcanized rubber other than hard rubber: Seals | Rubber seals made from butyl rubber | ✅ Formed Seal Article |
4014.90.10.00 |
Other articles of vulcanized rubber: Seals | Butyl rubber seals, inferred under "Other" seals | ✅ Formed Seal Article |
4016.93.10.20 |
Other articles of vulcanized rubber: Seals | Specific seal products made from vulcanized rubber | ✅ Formed Seal Article |
🔍 Key Reminder:
- Raw Material (Ch40.02) vs. Article (Ch40.14/40.16): The distinction is critical. Raw rubber has a different tariff structure than finished seals. - Butyl Specifics: Both4002.31and4002.39refer to "Butyl Rubber."4002.31is often more specific, but4002.39is a reasonable inference for "other" butyl forms if not explicitly listed elsewhere.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: From November 10, 2025 (including subsequent imports)
🎯 1. 4002.31.00.00 & 4002.39.00.00 —— Butyl Rubber Raw Material (Unvulcanized)
| Item | Content |
|---|---|
| Base Tariff | 0% (ad valorem) |
| Section 301 Surcharge | +25% (Additional Duty) |
| Section 122 Duty | +10% (Specific to this classification) |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Eligibility | ❌ Not Applicable (High risk of scrutiny) |
| Legal Basis Path | Section 301: 25% + Section 122: 10% + Base: 0% |
📌 Explanation:
- Base Tariff (0%): Standard MFN rate for raw rubber. - Section 301 (25%): The major US trade war tariff on Chinese goods. - Section 122 (10%): A specific additional duty often applied to certain rubber products. - Total 35%: This is a high-cost entry for raw materials. Importers must budget accordingly.
🎯 2. 4016.93.50.20 —— Butyl Rubber Seals (Article)
| Item | Content |
|---|---|
| Base Tariff | 2.5% |
| Section 301 Surcharge | +25% |
| Section 122 Duty | +10% |
| Total Tariff Rate | 37.5% |
| Tax Calculation | CIF Value × 37.5% |
| De Minimis Eligibility | ❌ Not Applicable |
| Legal Basis Path | Base: 2.5% + Section 301: 25% + Section 122: 10% |
📌 Explanation:
- Base Tariff (2.5%): Slightly higher base rate for manufactured rubber articles. - Total 37.5%: Higher than raw materials. Importing pre-formed seals attracts a higher total duty burden due to the higher base rate.
🎯 3. 4014.90.10.00 —— Butyl Rubber Seals (Alternative Classification)
| Item | Content |
|---|---|
| Base Tariff | 0% |
| Section 301 Surcharge | 0% |
| Section 122 Duty | +10% |
| Total Tariff Rate | 10.0% |
| Tax Calculation | CIF Value × 10% |
| De Minimis Eligibility | ❌ Not Applicable |
| Legal Basis Path | Base: 0% + Section 301: 0% + Section 122: 10% |
📌 Explanation:
- Base Tariff (0%): No base duty. - Section 301 (0%): Critical Note: Some seal classifications may be exempt from Section 301 depending on specific subheadings or exclusions. This is a significant cost saver. - Section 122 (10%): Still applies. - Total 10%: Significantly lower than other rubber codes. This classification offers the most favorable tariff structure for butyl rubber seals, provided it accurately describes the product.
🎯 4. 4016.93.10.20 —— Butyl Rubber Seals (Specific Seal Article)
| Item | Content |
|---|---|
| Base Tariff | 2.5% |
| Section 301 Surcharge | +25% |
| Section 122 Duty | +10% |
| Total Tariff Rate | 37.5% |
| Tax Calculation | CIF Value × 37.5% |
| De Minimis Eligibility | ❌ Not Applicable |
| Legal Basis Path | Base: 2.5% + Section 301: 25% + Section 122: 10% |
📌 Explanation:
- Same structure as4016.93.50.20. High total duty.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
✅ 1. Documentation Checklist (Essential)
| Document | Required | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must state: "Butyl Rubber," vulcanization status, compound details. |
| ✅ Certificate of Origin (CO) | ✔️ | Essential for proving Chinese origin and applying correct surcharges. |
| ✅ Commercial Invoice | ✔️ | Must clearly distinguish between Raw Material (4002) and Articles (4014/4016). |
| ✅ Packaging List | ✔️ | Detail weight, volume, and units. |
| ✅ Third-Party Test Report | ✔️ | Proof of material composition (e.g., Isobutylene-isoprene content). |
✅ 2. Declaration Strategy (Key Mantra)
🔥 "Raw Material vs. Article: Choose Wisely! Seals in 4014 Could Save 27.5%!"
| Scenario | Correct Declaration | Incorrect Practice | Result |
|---|---|---|---|
| Butyl Rubber Granules/Powder | 4002.31.00.00 or 4002.39.00.00 |
Declared as "Seals" | 📉 Lower Duty (35% vs 37.5%+) |
| Pre-formed Butyl Seals | 4014.90.10.00 (if eligible) |
Declared as 4016.93.50.20 |
💰 Save 27.5% (10% vs 37.5%) |
| Butyl Rubber Sheets | Check specific subheading | Misclassified as "Raw" | 🚫 Penalty/Reclassification Risk |
| Mixed Shipments | Separate lines for Raw vs. Articles | Combined as "Rubber Goods" | ⚠️ Confusion & Delays |
✅ 3. Special Handling
| Situation | Advice |
|---|---|
| OEM Custom Seals | Provide technical drawings to prove shape/function. If it looks like a seal, it’s likely 4014/4016. |
| Material Composition Proof | Customs may ask for lab reports to confirm it is indeed "Butyl" (IIR) and not another rubber (e.g., Nitrile). |
| Section 301 Exclusion | Check if your specific HS Code is eligible for Section 301 exclusion lists. 4014.90.10.00 appears to have 0% Section 301, which is a huge advantage. |
| De Minimis | Do not rely on de minimis for these codes due to high duties. Full entry is required. |
🌍 V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 4014.90.10.00 |
10% (Total) | FDA (if food/medical), RoHS | Best Option for Seals. 4002 codes are 35%. |
| 🇨🇳 China | 4002.31.00.00 |
0-5% | N/A | Low import duty for raw materials. |
| 🇪🇺 EU | 4002.31.00.00 |
0% | REACH | No additional surcharges like US. |
| 🇬🇧 UK | 4002.31.00.00 |
0% | UKCA | Post-Brexit tariffs generally favorable for raw rubber. |
| 🇯🇵 Japan | 4002.31.00.00 |
0% | PSE (if electrical) | Free trade agreement may apply. |
📌 Conclusion:
- USA is the most complex market due to Section 301 and Section 122. - For Raw Materials: Tariff is 35% in the US. - For Seals:4014.90.10.00at 10% is a strategic advantage over4016codes at 37.5%. Ensure the product fits the "Other" seal description under 4014 to leverage this lower rate.
📌 VI. Common Mistakes & Pitfall Guide (Lessons Learned)
❌ Mistake 1: Classifying Raw Butyl Rubber under 4014/4016
👉 Consequence: Unnecessary high duty if 4002 is more accurate, or audit risk.
✅ Fix: Raw = 4002. Formed = 4014/4016.
❌ Mistake 2: Classifying Seals under 4016 (37.5%) instead of 4014 (10%)
👉 Consequence: Overpaying 27.5% on CIF value.
✅ Fix: Review Chapter 40 Headings. 4014 (Sanitary, medical, etc. or Other) may have lower duties than 4016 (Other articles). Verify specific legal notes.
❌ Mistake 3: Ignoring Section 122
👉 Consequence: Unexpected 10% charge at customs.
✅ Fix: Factor 10% into all rubber product costings for US imports.
❌ Mistake 4: Vague Description "Rubber Material"
👉 Consequence: Customs flags for inspection, delays, potential reclassification.
✅ Fix: Use specific terms: "Butyl Rubber, Unvulcanized, Granules" or "Butyl Rubber Seal, Circular, 10mm ID".
🎯 VII. Conclusion: Professional Classification Saves Money!
🎯 Remember the Mantra:
🔹 "Raw is 35%, Seals in 4014 are 10%, Seals in 4016 are 37.5%. Choose Wisely!"
🔹 "Section 122 is the Hidden 10%, Section 301 is the 25% Hammer. 4014 is your Shield."
📌 Pro Tip:
If your butyl rubber seals are for medical devices, ensure they meet FDA requirements for 4014.90.10.00.
For raw materials, consider advance rulings to confirm 4002.31 vs 4002.39 applicability, though tax is the same (35%).
📣 Take Action Now:
📞 Consult a customs broker with your technical datasheet.
📋 Request an Advance Ruling for HS Code4014.90.10.00if importing seals.
🚀 Maximize Profit Margins by Minimizing Duty Burden!
✨ Professional Clearance Starts with Precise Classification!
💼 Your Cost Savings Are in the Details!
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.