High-Performance Silicone Mastic from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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