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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 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