Natural Rubber Foam Insulation Board
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 4006901000 | 35.0% | CN | US | Official Doc |
| 4008111000 | 35.0% | CN | US | Official Doc |
| 4008115000 | 38.3% | CN | US | Official Doc |
| 4006905000 | 37.7% | CN | US | Official Doc |
| 4005910000 | 35.0% | CN | US | Official Doc |
AI Analysis
πΏ Natural Rubber Foam Insulation Board (η‘«εζ©‘θΆζ³‘沫ζΏ)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional-Level Strategy
π I. Product Definition & Classification: Do You Really Understand "Rubber Foam Board"?
Natural Rubber Foam Insulation Board is a specialized material used for thermal insulation, vibration damping, and sealing in construction, automotive, and industrial applications. In international trade, the classification hinges on two critical factors: 1. State of Vulcanization: Is it vulcanized (cured/fixed structure) or unvulcanized (raw/uncured)? 2. Physical Form: Is it in the form of sheets, plates, or foam?
β οΈ Key Distinction:
- If the rubber is vulcanized (hardened, elastic, permanent shape) and in foam form β Generally falls under 4008.
- If the rubber is unvulcanized (soft, moldable, raw state) β Generally falls under 4006 or 4005.
- Note: "Natural Rubber" implies the raw material source, but HS codes depend heavily on the processing state.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided <DATA>, here are the five potential HS Codes with their matching logic and tax implications:
| HS Code | Product Description | Matching Logic (Based on <DATA>) |
Total Tax Rate |
|---|---|---|---|
| 4006.90.10.00 | Unvulcanized Rubber, Other Shapes & Articles | Material: Natural Rubber/Rubber; Form: Plate/Sheet. No material conflict. Classified as "Other shapes" of unvulcanized rubber. | 35.0% |
| 4008.11.10.00 | Vulcanized Rubber Sheets/Plates, Hard Rubber (Ebonite) | Match Success: Form (Plate) and Material (Rubber) align with core elements of "Hard Rubber/Other Vulcanized Rubber Plates." | 35.0% |
| 4008.11.50.00 | Vulcanized Rubber Foam Sheets/Plates | Match Success: "Rubber" = Material; "Foam" = Specific Category; "Board" = Form. Fully aligns with the definition of vulcanized rubber foam plates. | 38.3% |
| 4006.90.50.00 | Unvulcanized Rubber, Other Shapes & Articles | Material: Rubber; Form: Board (falls under "Other Shapes" & "Articles"). Logic consistent with unvulcanized rubber classification. | 37.7% |
| 4005.91.00.00 | Unvulcanized Compound Rubber (Containing Natural Rubber) | Material: Natural Rubber; Form: Board. Matches "Unvulcanized Compound Rubber" for sheets/stripes. | 35.0% |
π Critical Reminder:
- The biggest risk is misclassifying Vulcanized Foam (4008.11.50.00) as Unvulcanized (4006/4005).
- Vulcanized foam has a higher base tariff (3.3% vs 0%) but is physically distinct (cannot be re-molded).
- Unvulcanized rubber is softer and can be further processed. Your physical product must dictate the code.
π° III. 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
β Applicable Country: USA (US)
β Origin: China (CN)
β Effective Date: November 10, 2025 (Including subsequent imports)
π― 1. 4006.90.10.00 & 4005.91.00.00 & 4008.11.10.00 β Unvulcanized/Raw Rubber or Hard Rubber Plates
| Item | Details |
|---|---|
| Base Tariff | 0.0% (Ad Valorem) |
| USITC Surtax | +25% (Under USITC Footnote 9903.88.01 / Section 301) |
| IEEPA Surtax | +10% (Against China/HK products, effective Nov 10, 2025) |
| Total Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:4006.90.10.00 / 4005.91.00.00 β FOOTNOTE:9903.88.01 |
π Explanation:
- "USITC Surtax 25%" comes from Section 301 of the Trade Act.
- "IEEPA 10%" is the additional tariff under the International Emergency Economic Powers Act.
- Total 35%, which is a high tariff. Must be factored into cost modeling!
π― 2. 4008.11.50.00 β Vulcanized Rubber Foam Plates (Most Likely for "Insulation Board")
| Item | Details |
|---|---|
| Base Tariff | 3.3% (Ad Valorem) |
| USITC Surtax | +25% (Section 301) |
| IEEPA Surtax | +10% (Against China/HK products) |
| Total Rate | 38.3% |
| Tax Calculation | CIF Value Γ 38.3% |
| De Minimis Exemption | β Not Eligible (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:4008.11.50.00 β FOOTNOTE:9903.88.01 |
π Note:
- This code carries a higher total rate (38.3%) due to the 3.3% base tariff.
- However, this is the most accurate classification for "Foam Insulation Board" if it is vulcanized (cured).
- Even if it's "natural rubber," if it's processed into foam plates, it often falls here.
π― 3. 4006.90.50.00 β Unvulcanized Rubber, Other Shapes
| Item | Details |
|---|---|
| Base Tariff | 2.7% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Rate | 37.7% |
| Tax Calculation | CIF Value Γ 37.7% |
| De Minimis Exemption | β Not Eligible |
π οΈ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Guide)
β 1. Required Documentation Checklist (ηΌΊδΈδΈε―)
| Document | Mandatory | Description |
|---|---|---|
| β Product Spec Sheet | βοΈ | Must specify: Vulcanized vs. Unvulcanized, density, thickness, material composition (Natural Rubber %). |
| β Technical Data Sheet | βοΈ | Crucial for distinguishing between raw rubber (moldable) and foam insulation (elastic, cured). |
| β Product Photos | βοΈ | Clear images showing cross-section (foam structure) and label (HS code, origin, material). |
| β Commercial Invoice | βοΈ | Must explicitly state: "Natural Rubber Foam Insulation Board, Vulcanized/Unvulcanized" |
| β Packing List | βοΈ | Weight and dimensions must match customs declaration. |
| β Certificate of Origin | βοΈ | If applicable for other markets, but for US, it confirms CN origin for surcharges. |
β 2. Declaration Strategy (Key Mantra)
π₯ "State Matters! Foam = Cured? 4008.9 = Raw? 4006!"
| Scenario | Correct HS Code | Wrong Practice |
|---|---|---|
| Vulcanized Foam Board (Elastic, permanent shape) | 4008.11.50.00 | Misdeclare as "Unvulcanized" β 37.7% or 35% (but risky if inspection proves cured) |
| Unvulcanized Rubber Sheet (Soft, can be cut/reshaped) | 4006.90.10.00 / 4006.90.50.00 | Misdeclare as "Foam" β Higher base tariff if not foam |
| Compound Rubber (Unvulcanized) | 4005.91.00.00 | Misdeclare as pure natural rubber |
π Warning:
- Customs may perform a physical test to check vulcanization. If you declare it as unvulcanized but itβs cured, you face penalties + back taxes.
- "Insulation Board" usually implies vulcanized foam. Be honest in description.
β 3. Special Case Handling
| Situation | Recommendation |
|---|---|
| Mixed Shipment | If container has both vulcanized foam and unvulcanized rubber, split declaration. Do not mix! |
| Customs Labeling | Clearly label boxes: "VULCANIZED RUBBER FOAM" or "UNVULCANIZED RUBBER SHEET". |
| Value Declaration | Ensure CIF value is accurate. High value + high tariff (35-38.3%) = Significant tax impact. |
π V. Global Market Comparison (2026 Update)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Notes |
|---|---|---|---|
| πΊπΈ USA | 4008.11.50.00 (Vulcanized Foam) |
38.3% (25% + 10% + 3.3%) | Highest surcharge. Must pay ~38.3% |
| πΊπΈ USA | 4006.90.10.00 (Unvulcanized) |
35.0% (25% + 10% + 0%) | Lower if unvulcanized, but must prove state |
| π¨π³ China | 4008.11.50.00 |
5% - 10% | No Section 301/IEEPA surcharges |
| πͺπΊ EU | 4008.11.50.00 |
0% - 4.5% | No US-style surcharges. Check CE/RoHS |
| π―π΅ Japan | 4008.11.50.00 |
3% - 8% | No surcharges |
π Conclusion:
- USA is the most expensive market due to 35-38.3% effective rates.
- EU/Japan/China are significantly cheaper for the same goods.
π VI. Common Errors & Pitfalls (Lessons Learned)
β Error 1: Declaring "Rubber Board" without specifying Vulcanized/Unvulcanized
π Consequence: Customs delays, potential reclassification, and fines.
β Error 2: Assuming "Foam" always means higher base tariff
π Reality: Unvulcanized foam sheets may fall under 4006 (0% base) but still incur 35% total. Vulcanized foam (4008) has 3.3% base.
β Error 3: Ignoring IEEPA 10% Surcharge
π Consequence: Underpayment by 10%. IRS/CBP will demand back taxes + interest.
β Correct Declaration Example:
"Natural Rubber Foam Insulation Board, Vulcanized, Closed Cell, Thickness 10mm, Model XYZ, Origin: China"
π― VII. Conclusion: Precision in Classification Saves Money!
π― Remember the Mantra:
πΉ "Vulcanized Foam β 4008.11.50.00 (38.3%)"
πΉ "Unvulcanized Rubber β 4006/4005 (35-37.7%)"
πΉ "No De Minimis Exemption β Pay Full Tax!"
π Pro Tip:
If you are importing large volumes, consider Advance Ruling (Pre-Ruling) from US Customs to confirm the exact HS code based on your product sample. This avoids surprise taxes at port.
π£ Immediate Action:
π Contact your customs broker with technical specs (especially vulcanization status).
π Calculate landed cost including 35-38.3% tax before finalizing purchase orders.
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Your Profit Margin Depends on Every Percent of Tariff!
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.