🛢️ Oil Soluble Nitrile Rubber (NBR) Compound

🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Entry Strategy

📌 1. Product Definition & Classification: Do You Really Understand “NBR Compound”?

Nitrile Butadiene Rubber (NBR) is a synthetic rubber copolymer of acrylonitrile and butadiene. It is renowned for its resistance to oils, fuels, and other chemicals.
When referred to as an “Oil Soluble NBR Compound” in trade documentation, it typically denotes NBR rubber in a processed, compounded state (mixed with additives like plasticizers, stabilizers, or fillers), rather than raw polymer.

In international trade, this product falls under Chapter 40 (Rubber and Articles Thereof). The critical distinction lies in its state: - Raw/Unvulcanized State: If the compound is unvulcanized (not yet cured/hardened), it is classified under Heading 4005. - Vulcanized State: If it is already hardened/cured into a specific shape (like sheets or rods), it may fall under Heading 4016.

Given the term “Compound” and typical export forms, it is most often an unvulcanized rubber mixture used as a raw material for further processing.

⚠️ Key Distinction:
- If it is unvulcanized (soft, pliable, ready for molding) → Heading 4005
- If it is vulcanized (hard, fixed shape) → Heading 4016
- If it is raw polymer without additives → Heading 4002

📦 2. HS Code Classification Details (2026 Latest Tariff Authority Comparison)

Based on the provided data, here are the most likely HS Codes for Oil Soluble NBR Compound:

🔍 Key Insight:
- 4005.20.00.00 and 4005.91.00.00 are the most accurate for “NBR Compound” if it is unvulcanized.
- 4002.51.00.00 is for raw NBR polymer without additives. If your product is a “compound” (mixed), this is incorrect.
- 3911.90.10.00 is generally not recommended for standard NBR, as NBR is classified under Chapter 40, not Chapter 39 (Plastics).

💰 3. 2026 Latest Tariff Rate Details (Including Additional Taxes, Policy Surcharges)

✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: November 10, 2025 (and subsequent imports)

🎯 1. 4005.20.00.00 —— Mixed Unvulcanized Rubber, Containing NBR

📌 Explanation:
- The 25% USITC tariff is part of the Section 301 duties on Chinese goods;
- The 10% IEEPA tariff is an additional surcharge on Chinese rubber products;
- Total 35% is high, so pre-calculation is essential!

🎯 2. 4005.91.00.00 —— Other Mixed Unvulcanized Rubber, Containing NBR

📌 Note:
- Same rate as 4005.20.00.00;
- Applies to NBR compounds that do not fit the specific “4005.20” subheading;
- Commonly used for custom NBR blends.

🎯 3. 4005.99.00.00 —— Other Mixed Unvulcanized Rubber (Not Containing NBR or Generic)

📌 Note:
- Used if NBR content is not explicitly declared or if the compound is a generic rubber mix;
- Same 35% rate applies.

🎯 4. 4002.51.00.00 —— Butadiene-Style Synthetic Rubber (Raw NBR)

📌 Note:
- Only apply if the product is raw NBR polymer with no additives;
- Misclassifying compound as raw polymer leads to customs penalties.

🎯 5. 3911.90.10.00 —— Polysulfides/Synthetic Rubbers (Incorrect Classification)

📌 Note:
- Not recommended for NBR;
- Used only for specialty synthetic rubbers not classified under Chapter 40.

🛠️ 4. Customs Clearance Practical Advice (Real-World Pitfall Guide)

✅ 1. Required Documentation Checklist (Mandatory)

✅ 2. Declaration Tips (Key Mantra)

🔥 “State Matters: Unvulcanized = 4005, Raw = 4002, Vulcanized = 4016!”

✅ 3. Special Cases Handling

🌍 5. Global Market Customs Comparison (2026 Latest)

📌 Conclusion:
- USA imposes the highest tariff (35%) on Chinese NBR compounds;
- EU, UK, Japan, Australia have 0–5% rates;
- Consider supply chain diversification if targeting the US market.

📌 6. Common Errors & Pitfalls (Lessons Learned)

❌ Error 1: Declaring “NBR Compound” as “Raw NBR” (4002.51.00.00)
👉 Consequence: Customs may reject if additives are present → Delay or Penalty

❌ Error 2: Declaring “Unvulcanized Compound” as “Vulcanized Rubber” (4016.93.00.00)
👉 Consequence: Wrong HS code → Additional 25% tariff risk if reclassified

❌ Error 3: Vague Description “Rubber Material”
👉 Consequence: Customs cannot verify NBR content → Inspection Hold

❌ Error 4: Not Providing SDS or Lab Report
👉 Consequence: Uncertainty in classification → Audit or Back-tariff

✅ Correct Practice:

“Unvulcanized Nitrile Butadiene Rubber (NBR) Compound, 33% ACN Content, Oil Resistant Grade, Packaged in 25kg Bags, Model NBR-33, No Plasticizers”

🎯 7. Conclusion: Professional Declaration, Save Time, Reduce Costs!

🎯 Remember the Mantra:

🔹 “Unvulcanized = 4005, Raw = 4002, Vulcanized = 4016!”
🔹 “HS Code Determines Fate, 35% Tariff in USA, Declaration Accuracy Saves Thousands!”

📌 Pro Tip:
- If your NBR compound is imported from Vietnam, Malaysia, or Thailand, you may qualify for IEEPA Exemption or lower Section 301 rates;
- Consider applying for Advance Ruling (Pre-classification) from U.S. Customs to avoid disputes.

📣 Immediate Action:

📞 Contact a professional customs broker + Provide Product Photos + Apply for HS Code Pre-classification
🚀 Ensure smooth customs clearance, efficient export, and profit maximization!

✨ Professional Customs Clearance Starts with Accurate Classification!
💼 Every Dollar Saved is Worth Precise Calculation!