High-Performance Silicone Mastic from Mexico
Neutral-cure silicone mastic for expansion joints in commercial buildings, neutral odor. Falls under HTS 3214.10.00.20 as other mastics for surfacing. High elasticity for seismic zones.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• ASTM C920 certification required for structural silicone claims
• VOC compliance via CARB or EPA for indoor air quality
• Distinguish cure type (acetic vs neutral) in docs for proper class