Polyisobutylene (PIB) Gum
Polyisobutylene, a synthetic rubber-like polyolefin from isobutylene monomer, imported as a viscous liquid or granules. The isobutylene units contribute over 95% by weight, classifying it under tariff item 3902.90.00 as an other olefin polymer.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is vulcanized or cross-linked to a rubber-like state.
Vulcanized rubber is classified under Chapter 40.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify the physical form (liquid or granules) on the customs declaration
• Provide monomer composition data to support classification
• Check if the product is subject to any synthetic rubber regulations
Related Products under Tariff item 3902.90.00
Copolymer Polybutene PB-0300 MFI Pellets
Copolymer polybutene pellets with a melt flow index of 0.3 g/10min, used in film blowing applications. The butene monomer units predominate by weight, classifying it as a polymer of other olefins in primary forms under tariff item 3902.90.00.
Duraflex PB8400 Polybutene
Polybutene resin with medium melt flow index, designed for blow molding pipes. This primary form olefin polymer has butene as the predominant monomer, placing it under tariff item 3902.90.00 for other olefin polymers.
High-Density Polybutene Pellets
High-density polybutene resin pellets used for piping and hot-melt adhesives. The butene-derived polymer is in primary granular form with over 95% monomer content, qualifying as an other olefin polymer under tariff item 3902.90.00.
Hybrar 7310SE Polyolefin Block Copolymer
Styrenic block copolymer with an olefin midblock, used for asphalt modification. The olefin monomer units predominate by weight, classifying it as an other olefin polymer in primary form under tariff item 3902.90.00.
Indopol H-1500 Polybutene
High-viscosity liquid polybutene used in industrial lubricants. This primary liquid olefin polymer has butene units predominating, placing it under tariff item 3902.90.00 for other olefin polymers.
Isotactic Polybutene Powder
Isotactic polybutene powder, a stereoregular olefin homopolymer in primary powder form. The butene monomer purity exceeds chapter note requirements, classifying it under tariff item 3902.90.00 as an other olefin polymer.