Insulating Refractory Castable from Mexico
Lightweight castable with ceramic fiber and vermiculite for low thermal conductivity furnace backings. Under HTS 3816.00.20 as other refractory concretes, used behind dense linings in heat processing. Balances insulation and strength.
Duty Rate — Mexico → United States
13%
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
• Specify density (<1.5 g/cm³) and K-factor to prove insulating refractory nature
• Fiber content requires OSHA MSDS; watch for asbestos misdeclaration