3816.00.20/Insulating Refractory Castable/Japan

Insulating Refractory Castable from Japan

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 — 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%

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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