HS 390220 Polyisobutylene
Quick Answer: Polyisobutylene imported under HS 390220 enters the UK at 6.00%, the EU at 6.50%, and the US at 6.5% under the MFN rate, with some trade agreements offering duty-free entry. This HS code specifically covers polyisobutylene, a synthetic rubber produced from isobutylene monomers. It is commonly used in applications such as adhesives, sealants, and as a component in chewing gum. Importers should be aware of the specific tariff treatment based on the country of origin and any applicable free trade agreements. CustomTariffs aggregates this information to assist trade professionals.
What Are the Import Duty Rates?
🇬🇧 United Kingdom
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3902200000 | 6.00 % | — | — |
| 3902200090 | 6.00 % | — | — |
| 3902200020 | 6.00 % | — | — |
🇪🇺 European Union (TARIC)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 3902200000 | 6.50 % | — | — |
| 3902200020 | 6.50 % | — | — |
| 3902200090 | 6.50 % | — | — |
🇺🇸 United States (HTSUS)
| Code | MFN | Preferential | Unit |
|---|---|---|---|
| 390220 | — | — | — |
| 3902205000 | 6.5% | Free (17 programs) | ["kg"] |
| 3902201000 | Free | — | ["kg"] |
Special rates available under trade agreements including USMCA, KORUS, GSP.
Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).
Data compiled and presented by HSRates.
Which Trade Agreements Reduce Duties for HS 3902.20?
Imports of Polyisobutylene may qualify for reduced or zero duty rates under free trade agreements and preferential programs. The overview below shows available preferential arrangements by jurisdiction, compiled by HSRates from official tariff and trade agreement data.
United States (HTSUS)
Free for USMCA, KORUS, and 15 other programs
European Union (TARIC)
Preferential rate data not yet available.
United Kingdom
Preferential rate data not yet available.
Preferential rates require proof of origin and may be subject to quotas or conditions. Always verify eligibility with a licensed customs broker.
Data compiled by HSRates.
Which Preferential Rates Apply to Your Origin Country?
Select an origin country to see if preferential rates apply.
Preferential rates based on available trade agreements. Actual rates may vary.
How Has Trade Volume Developed?
Trade Volume 2023
How to Classify This HS Code?
What products does HS 390220 cover?
This subheading covers polyisobutylene (PIB) in its primary forms, as defined by the World Customs Organization (WCO) Harmonized System Nomenclature. According to the US International Trade Commission (USITC) Harmonized Tariff Schedule (HTS) and the EU's TARIC database, this includes polymers of isobutylene, typically with a molecular weight ranging from low to very high, often used as a base for lubricants, adhesives, and sealants. It is characterized by its non-crystalline structure and excellent gas impermeability.
What falls outside HS 390220?
The following products are excluded from HS 390220: copolymers of isobutylene with other monomers, such as butyl rubber (which is classified under HS 4002.20), and polyisobutylene that has undergone significant chemical modification or is presented in a form other than its primary state, such as finished articles. Blends of polyisobutylene with other substances, unless they meet the definition of a copolymer or are specifically listed elsewhere, are also generally excluded.
What are common classification mistakes for HS 390220?
A common error is misclassifying copolymers of isobutylene with other monomers under this subheading. According to General Rule of Interpretation (GRI) 1, classification is determined by the terms of the heading and any relative section or chapter notes. For instance, butyl rubber, a copolymer of isobutylene and isoprene, is specifically classified under HS 4002.20, not 390220, due to its distinct properties and common usage as a synthetic rubber.
How should importers classify products under HS 390220?
The correct procedure for classifying products under HS 390220 involves first identifying the material's chemical composition. Importers and customs brokers must confirm that the product is indeed polyisobutylene and not a copolymer or a finished article. Reviewing the manufacturer's technical data sheets and consulting the official tariff schedules of the importing country, such as the USITC HTS or the UK Trade Tariff, is crucial for accurate classification.
How is the duty calculated for products under HS 390220?
A shipment of 1,000 kilograms of polyisobutylene with a declared customs value of $5,000 USD would attract a US duty of $150.00. This is calculated using the Most Favored Nation (MFN) duty rate of 3.0% ad valorem, applied to the declared value ($5,000 USD × 0.03 = $150.00). This calculation is based on the rates published in the USITC Harmonized Tariff Schedule, effective as of the latest revision.
Which trade agreements reduce duties for HS 390220?
Several free trade agreements may reduce the applicable duty rate for HS 390220, including the United States-Mexico-Canada Agreement (USMCA), which can result in a duty-free entry for qualifying goods originating from Canada or Mexico. Additionally, the Generalized System of Preferences (GSP) may offer preferential rates or duty-free status for eligible products from designated developing countries. Documentation typically required includes a self-certified origin statement for USMCA or a GSP Form A for GSP beneficiaries.
```Which HS Codes Are Related?
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FAQ
What are the typical import duty rates for Polyisobutylene (HS 390220) into the United States?
For Polyisobutylene (HS 390220) imported into the United States, the standard Most Favored Nation (MFN) duty rate is 6.5% ad valorem. However, preferential duty rates may apply under various Free Trade Agreements (FTAs). For example, goods originating from Australia (AU) or South Korea (KR) may enter duty-free. It is crucial to consult the Harmonized Tariff Schedule of the United States (HTSUS) maintained by the US International Trade Commission (USITC) for the most current and specific rates applicable to your country of origin.
How is the import duty for Polyisobutylene (HS 390220) calculated in the US, and can you provide an example?
The import duty for Polyisobutylene (HS 390220) into the United States is typically calculated on an ad valorem basis, meaning it's a percentage of the declared value of the goods. For instance, if the MFN duty rate is 6.5% ad valorem, and you import 1,000 kilograms of Polyisobutylene with a declared customs value of $2,000 USD, the duty calculation would be: $2,000 (value) × 0.065 (duty rate) = $130 USD. This amount represents the total import duty payable. Always verify the specific duty rate and valuation methods with the HTSUS.
What documentation is typically required for importing Polyisobutylene (HS 390220) into the EU?
When importing Polyisobutylene (HS 390220) into the European Union, standard customs documentation is required. This includes a commercial invoice, a packing list, and a bill of lading or air waybill. Crucially, an import declaration must be submitted, which details the HS code, origin, value, and quantity of the goods. Depending on the origin of the goods and any applicable trade agreements, a proof of origin (e.g., EUR.1 certificate or origin declaration) may be necessary to claim preferential duty rates. Importers should consult the EU's TARIC database for specific requirements and potential duties.
Are there specific classification criteria for Polyisobutylene (HS 390220) that differentiate it from other polyolefins?
Yes, HS code 390220 specifically covers 'Polyisobutylene.' This classification is based on the chemical composition and structure of the polymer. Polyisobutylene is a synthetic rubber derived from the polymerization of isobutylene. It is distinct from other polyolefins like polyethylene or polypropylene, which are derived from ethylene and propylene, respectively. The World Customs Organization (WCO) Harmonized System Explanatory Notes provide detailed guidance on distinguishing between different polymers based on their monomers and polymerization processes. Proper identification of the polymer's chemical identity is essential for accurate classification.
Which common trade agreements offer preferential duty rates for Polyisobutylene (HS 390220) into the UK?
The United Kingdom offers preferential duty rates for Polyisobutylene (HS 390220) under various trade agreements. For example, goods originating from countries like Australia (AU), Canada (CA), or South Korea (KR) may benefit from reduced or zero duty rates. The specific preferential rates and eligibility criteria are detailed in the UK Trade Tariff. Importers must ensure they have the necessary proof of origin to claim these preferential treatments. It is advisable to check the UK Trade Tariff for the most up-to-date information on applicable agreements and rates.