Elastomeric Polyisobutylene Rubber
Elastomeric polyisobutylene is a synthetic rubber polymer where isobutylene monomer units constitute 95% or more by weight, classified under HTS 3902.20.10.00 as elastomeric polyisobutylene in primary form. It is used in manufacturing tires, seals, and adhesives due to its high elasticity and impermeability to gases. This primary form excludes finished articles or compounded products.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-elastomeric properties
Non-elastomeric polyisobutylene falls under the 'Other' subheading in the same series per subheading note (a)(4), based on predominant monomer but lacking elastomeric traits.
If chemically modified or compounded with additives
Post-polymerization modifications or synthetic rubber compounding shift classification to Chapter 40 for processed synthetic rubbers, not primary polymers.
If containing 70%+ by weight of petroleum oils or bitumen
Blends with high petroleum content are classified in Chapter 27 as petroleum products rather than primary olefin polymers.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Verify monomer content exceeds 95% isobutylene via lab testing for classification compliance; provide detailed chemical composition certificates
• Avoid common pitfalls like misclassifying as non-elastomeric under 3902.20.50.00
• Ensure primary pellet or bale form, not processed sheets
Related Products under HTS 3902.20.10.00
Butyl Rubber Vistanex L-100
Vistanex L-100 is a high molecular weight elastomeric polyisobutylene with over 95% isobutylene content, imported in primary pellet form under HTS 3902.20.10.00. Known for tackiness, it serves as a pressure-sensitive adhesive base in tapes and sealants. Its elastomeric nature distinguishes it from rigid polyolefins.
Elastomeric Polyisobutylene Pellets for Tire Inner Liner
These pellets are elastomeric polyisobutylene with 97% isobutylene monomer content, designed for compounding into tire inner liners under HTS 3902.20.10.00. Their gas impermeability and elasticity qualify them as primary form elastomers. Supplied unvulcanized for downstream rubber processing.
Opanols Elastomeric Polyisobutylene Resin
Opanols are medium molecular weight elastomeric polyisobutylene resins meeting the 95% isobutylene criterion for HTS 3902.20.10.00 classification in primary forms like granules. Used in chewing gum bases and cable insulation for elasticity and moisture resistance. Excludes any finished plastic articles.
High Cis Elastomeric Polyisobutylene HMW
High molecular weight (HMW) elastomeric polyisobutylene with high cis content, over 95% isobutylene by weight, imported as primary polymer under HTS 3902.20.10.00. Ideal for sealants, roofing membranes, and vibration dampeners due to superior elasticity. Primary form ensures classification before vulcanization.