Fluorosilicone Polymer Gum from Mexico
Fluorosilicone gum stock is used in aerospace seals requiring fuel resistance. Primary form classification under HTS 3910.00.00.00 when fluoroalkyl siloxane monomers predominate.
Duty Rate — Mexico → United States
13%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide monomer ratio analysis showing siloxane family dominance
• Aerospace customers require MIL-spec certification at entry
• Avoid compounded gums to stay in primary forms