Synthetic Isoprene-Butadiene Rubber (SIBR)
BR copolymerized with small isoprene for tire treads, in granular primary form. Classifies under HTS 4002.20.00.00 if predominantly butadiene rubber meeting BR criteria.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If significant isoprene content
Isoprene-butadiene copolymers with notable IR classify separately from pure BR.
If not qualifying as BR
Copolymers failing strict BR elongation/recovery test go to other synthetic.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Monomer ratio analysis required to confirm BR dominance over ISR classification
• Vulcanization compliance testing essential for copolymer synthetic rubber status
Related Products under HTS 4002.20.00.00
Styrene-Butadiene Rubber (SBR) Latex
A liquid dispersion of butadiene rubber copolymerized with styrene, used in adhesives and carpet backings. Classified under HTS 4002.20.00.00 as synthetic butadiene rubber (BR) in primary form (latex), meeting vulcanization and elasticity criteria without prohibited compounding agents.
Polybutadiene Rubber (BR) Granules
Granular form of cis-1,4-polybutadiene rubber, a primary form for tire manufacturing and synthetic golf balls. Falls under HTS 4002.20.00.00 as butadiene rubber in bulk granules, uncompounded and retaining raw material character.
High Cis-Polybutadiene Rubber Bale
Baled high-cis butadiene rubber for conveyor belts and footwear soles, in primary bulk form. HTS 4002.20.00.00 applies to this unvulcanized synthetic BR meeting elongation/recovery tests without prohibited additives.
Neodymium-Catalyzed Polybutadiene Rubber
High-microstructure BR produced via neodymium catalyst, baled for golf balls and tires. HTS 4002.20.00.00 covers this synthetic butadiene rubber in primary bale form, uncompounded.
Butadiene Rubber Powder
Fine powder form of BR for rubber compounding and asphalt modification. Primary form under HTS 4002.20.00.00 as synthetic rubber powder, meeting Chapter 40 purity requirements.
Cis-1,4-Polybutadiene Rubber Latex
Prevulcanized latex of cis-butadiene rubber for dipping and coatings. Classifies in HTS 4002.20.00.00 as BR primary liquid form, with permitted prevulcanization per notes.