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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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