Teflon Sealing Material
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3926904510 | 38.5% | CN | US | Official Doc |
| 3926904590 | 38.5% | CN | US | Official Doc |
| 4016935020 | 37.5% | CN | US | Official Doc |
| 4016931020 | 37.5% | CN | US | Official Doc |
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AI Analysis
π‘οΈ Teflon Sealing Materials (PTFE & Rubber Seals)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Customs Strategy
π 1. Product Definition and Classification: Do You Really Understand "Seals"?
Teflon (Polytetrafluoroethylene, PTFE) and vulcanized rubber seals are critical components for preventing leaks in automotive, industrial, and hydraulic systems. In international trade, they are strictly categorized by material (Rubber vs. Plastic/PTFE) and application (General vs. Automotive).
PTFE/Plastic Seals (Teflon): Generally classified under Chapter 39 (Articles of Plastics) because PTFE is a fluoropolymer plastic. Vulcanized Rubber Seals: Classified under Chapter 40 (Vulcanized Rubber Other Than Hard Rubber).
β οΈ Key Distinction Point:
- If the seal is made of Teflon/PTFE β It is a "Plastic Article" β Chapter 39.
- If the seal is made of Vulcanized Rubber β It is a "Rubber Article" β Chapter 40.
- Automotive Specificity: Even if made of rubber, seals specifically for automotive goods (Ch. 87) have a different subheading than general-purpose seals.
π¦ 2. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the provided data, here are the four specific HS Codes for Teflon (Plastic) and Rubber Seals.
| HS Code | Product Description | Material | Application Specifics | Tax Rate (Total) |
|---|---|---|---|---|
| 3926.90.45.10 | Other articles of plastics: Gaskets, washers and other seals: O-Rings | PTFE/Teflon (Plastic) | General purpose O-Rings (Teflon is a plastic) | 0.0% |
| 3926.90.45.90 | Other articles of plastics: Gaskets, washers and other seals: Other | PTFE/Teflon (Plastic) | Teflon seals that are NOT O-Rings (e.g., gaskets, washers, custom shapes) | 0.0% |
| 4016.93.10.20 | Other articles of vulcanized rubber: Gaskets, washers and other seals: Of a kind used in the automotive goods | Vulcanized Rubber | Automotive Oil Seals (Specific to Ch. 87 goods) | 27.5% |
| 4016.93.50.20 | Other articles of vulcanized rubber: Gaskets, washers and other seals: Other | Vulcanized Rubber | General/Non-Automotive Oil Seals (Industrial, Hydraulic, etc.) | 27.5% |
π Critical Reminder:
- "Teflon" = Plastic (Chapter 39): Do not classify Teflon seals under Chapter 40 (Rubber). This is a common error that leads to severe penalties.
- "Rubber Oil Seals" = Chapter 40: Even if "Teflon-faced," if the primary sealing element or structure is vulcanized rubber, it may fall here. However, pure Teflon seals are 3926.
- Automotive vs. General: For rubber seals, the destination (Automotive vs. General Industrial) changes the HS code but not the tax rate in this dataset.
π° 3. 2026 Latest Tariff Rate Details (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Origin: China (CN) (Inferred from high surtax rates typical of US-China trade data)
β Effective Time: Current 2026 Tariff Schedule
π― 1. 3926.90.45.10 & 3926.90.45.90 ββ PTFE/Teflon Seals (Plastic Articles)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| Additional Surtax (e.g., Section 301) | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0% = $0 Duty |
| De Minimis Eligibility | β Yes (Generally) |
| Legal Basis | Standard Chapter 39 Tariff Schedule |
π Explanation:
- Teflon (PTFE) seals are classified as plastic articles.
- Currently, these items enjoy 0% total tariff (Base + Surtax).
- This makes them highly cost-effective for import compared to rubber seals.
- Advantage: No additional penalties or high surtaxes apply to these plastic seals in the provided dataset.
π― 2. 4016.93.10.20 ββ Automotive Rubber Oil Seals
| Item | Content |
|---|---|
| Base Tariff | 2.5% |
| Additional Surtax | 25.0% |
| Total Tax Rate | 27.5% |
| Tax Calculation | CIF Value Γ 27.5% |
| De Minimis Eligibility | β No (High risk of audit) |
| Legal Basis | Chapter 40, Note: Automotive Goods Classification |
π Explanation:
- These are vulcanized rubber seals specifically designed for automotive applications (Chapter 87 goods).
- They incur a 2.5% base tariff + 25% additional surtax = 27.5% total.
- Cost Impact: Significant duty cost. Must be clearly declared as "Automotive Oil Seals."
π― 3. 4016.93.50.20 ββ General/Industrial Rubber Oil Seals
| Item | Content |
|---|---|
| Base Tariff | 2.5% |
| Additional Surtax | 25.0% |
| Total Tax Rate | 27.5% |
| Tax Calculation | CIF Value Γ 27.5% |
| De Minimis Eligibility | β No |
| Legal Basis | Chapter 40, General Category |
π Explanation:
- These are vulcanized rubber oil seals for non-automotive uses (e.g., hydraulic pumps, general machinery).
- Same tax rate as automotive rubber seals (27.5%).
- Caution: Do not misdeclare industrial seals as "automotive" to avoid compliance issues, even though the rate is the same.
π οΈ 4. Customs Clearance Practical Advice (Real-World Pitfall Guide)
β 1. Required Documentation Checklist (Non-Negotiable)
| Document | Must Provide? | Notes |
|---|---|---|
| β Material Specification | βοΈ | Must explicitly state "PTFE" or "Teflon" for plastic seals, or "Vulcanized Rubber" for rubber seals. |
| β Product Photos | βοΈ | Show cross-section to prove material type (e.g., all-plastic vs. rubber with metal insert). |
| β Commercial Invoice | βοΈ | Clearly describe as: "PTFE O-Ring, AS568 Size xxx" or "Rubber Oil Seal for Automotive Engine." |
| β Application Proof | βοΈ | If claiming Automotive (4016.93.10.20), provide evidence it is for Ch. 87 goods (e.g., auto part invoice, OEM contract). |
| β Certificate of Origin | βοΈ | Essential for tariff determination. |
β 2. Declaration Tips (Key Mnemonics)
π₯ "Teflon is Plastic (0%), Rubber is Taxed (27.5%)! Specify 'Oil Seal' and 'Auto'!"
| Situation | Correct Declaration | Incorrect Declaration |
|---|---|---|
| Pure Teflon/PTFE Seal | 3926.90.45.10 (O-Ring) or 3926.90.45.90 (Other) |
4016.93... (Rubber) β Penalty + 27.5% Tax |
| Rubber Seal for Car | 4016.93.10.20 ("Of a kind used in automotive goods") |
4016.93.50.20 (General) β Higher Scrutiny |
| Rubber Seal for Pump | 4016.93.50.20 ("Other") |
4016.93.10.20 (Automotive) β Misclassification Risk |
| Teflon-Coated Rubber Seal | Check primary material. If rubber dominates β 4016 |
Assume 3926 because it says "Teflon" |
β 3. Special Handling Cases
| Situation | Handling Advice |
|---|---|
| Hybrid Seals (Teflon + Rubber) | If the sealing surface is PTFE but the backup is rubber, consult customs. Often classified by the primary function. If it's an "Oil Seal," rubber may dominate. |
| Custom-Shaped Teflon Gaskets | Use 3926.90.45.90 (Other) as it is not an O-Ring. |
| Bulk O-Rings vs. Pre-Cut Seals | Both fall under 3926.90.45.10 if they are O-Rings. |
| Misclassification Risk | Declaring Teflon as Rubber to avoid 27.5% tax is fraud. Audits often require material analysis (FTIR test). |
π 5. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code (Teflon/PTFE) | Tariff Rate | Notes |
|---|---|---|---|
| πΊπΈ USA | 3926.90.45.10 / 3926.90.45.90 |
0.0% | Highly competitive; no surtax for plastic seals. |
| πΊπΈ USA | 4016.93.10.20 / 4016.93.50.20 |
27.5% | High duty for rubber seals. |
| π¨π³ China | 3926.90.90.90 (Similar) |
5-10% | Lower base duty, but no surtax issue. |
| πͺπΊ EU | 3926.90.97 (Other plastics) |
4.5% | No Section 301 equivalent; lower burden. |
| π¦πΊ Australia | 3926.90.90.90 |
5.0% | Moderate duty. |
π Conclusion:
- Teflon (PTFE) seals are significantly cheaper to import into the US than rubber seals due to the 0% vs. 27.5% tariff difference.
- Rubber seals carry a heavy 27.5% tax burden (2.5% base + 25% surtax).
- Strategy: If performance allows, consider PTFE-coated or all-PTFE alternatives to reduce duty costs, provided material specifications are accurate.
π 6. Common Mistakes & Pitfall Guide (Blood Lessons)
β Mistake 1: Calling a Teflon seal a "Rubber Seal" to avoid tax.
π Consequence: Customs will conduct material testing. If found as PTFE, you face back duties (27.5%) + penalties + seizure.
β Mistake 2: Not specifying "Automotive" for rubber oil seals.
π Consequence: Declared as "Other" (4016.93.50.20). While the rate is the same (27.5%), incorrect classification can lead to detention and audit if the origin/usage is disputed.
β Mistake 3: Using "Gasket" instead of "Oil Seal" for rubber items.
π Consequence: May trigger different scrutiny under Chapter 40. Ensure the description matches the HS subheading ("Oil Seals" vs. "Gaskets").
β Mistake 4: Assuming all "Teflon" products are 3926.
π Consequence: If it's a composite (e.g., rubber spring with Teflon lip), it might be rubber. Check the principal material.
β Correct Approach:
"PTFE O-Ring, 1/2 inch, Chemical Resistant, for Hydraulic System" β
3926.90.45.10(0%)
"Vulcanized Rubber Oil Seal, for Automotive Transmission" β4016.93.10.20(27.5%)
π― 7. Conclusion: Professional Declaration Saves Money!
π― Remember the Mantra:
πΉ "Teflon is Plastic (0%), Rubber is Taxed (27.5%)!"
πΉ "Specify 'Automotive' for Rubber, but Pay 27.5% Regardless!"
πΉ "Accurate Material Declaration Prevents Audit Pain!"
π Tip:
If your Teflon seals are O-Rings, use 3926.90.45.10.
If they are other shapes (gaskets, washers), use 3926.90.45.90.
Both are 0% Tax in the US.
For Rubber Oil Seals, be prepared for 27.5% duty.
π£ Immediate Action:
π Confirm material with supplier (PTFE vs. Rubber)
π Label correctly on Invoice
π Save 27.5% duty by choosing the right HS Code for Teflon!
β¨ Professional Customs Clearance Starts with Accurate Classification!
πΌ Your Cost Efficiency Depends on This 0% vs. 27.5% Difference!
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.