High Molecular Weight Butyl Rubber Crumbs from Mexico
Crumbs of high MW isobutene-isoprene rubber for blending in conveyor belts. HTS 4002.31.00.00 for primary crumb form, complying with synthetic rubber vulcanization and recovery tests in chapter note 2(a).
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Lab tests for elongation/recovery properties mandatory for synthetic rubber proof
• Crumb size uniformity prevents reclass to waste under 4004
• Document MW specs for quality assurance in customs valuation