Liquid Polyisobutylene Napvis 10 from Germany
Napvis 10 is a low-viscosity liquid polyisobutylene used in cable filling compounds and corrosion inhibitors, classified under HTS 3902.20.5000 as 'Other' with predominant isobutylene monomer units. Supplied in bulk containers as primary polymer liquid.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Test for water content affecting classification; provide flash point data for DOT compliance; declare as primary polymer not compound to maintain rate