HBFC Foam Blowing Agent Concentrate from Mexico
Concentrated HBFC-243db1 (CF3CHBrCF2CH2F) formulation for rigid polyurethane foam expansion in aerospace applications. Classified in 3827.12.00.00 as HBFC mixture for chemical processing. Exempt from most bans due to critical defense specifications.
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
• Include DoD or NASA end-user letters justifying critical military/aerospace specifications for HBFC use
• Certify foam density and thermal requirements cannot be met with HFC/HFO alternatives
• Document as 'processing agent' not final foam product to avoid 3921 classification