Insulating Refractory Brick
Insulating refractory bricks are lightweight, fired from vermiculite-clay mixes to reduce heat loss in furnace walls and backup linings. They feature low thermal conductivity and high porosity, making them ideal for thermal insulation in high-temperature equipment. This product falls under tariff item 6902.90.00 as a refractory ceramic constructional good other than those of siliceous fossil meals.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the bricks are mineral wool or similar insulating materials, not fired ceramics
Non-ceramic insulating materials are classified under Chapter 68.
If the bricks are used as loose insulation rather than constructional goods
Refractory articles for non-construction uses fall under heading 6903.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the bricks are fired and not merely dried, as low-temperature processing excludes them from Chapter 69
• Provide thermal conductivity data to support the refractory classification
• Ensure the vermiculite content is documented for CBSA review
Related Products under Tariff item 6902.90.00
90% Alumina Refractory Bricks
90% alumina refractory bricks are high-purity ceramic constructional goods fired after shaping, designed for critical zones in aluminum smelters and cement kilns. Their high fired density and resistance to molten metal and alkali corrosion qualify them as refractory ceramic products under this tariff item.
Acid-Resistant Fireclay Refractory Brick
An acid-resistant fireclay refractory brick engineered for service in chemical processing kilns where acidic slags and gases are present. Fired from high-silica clay at temperatures between 1350°C and 1500°C, it provides durable performance in corrosive environments. This product qualifies under tariff item 6902.90.00 as a refractory ceramic constructional good other than those of siliceous fossil meals.
Andalusite Refractory Brick
Andalusite refractory bricks incorporate andalusite for enhanced thermal shock resistance, ideal for coke oven doors and reheat furnace roofs. They are fired ceramic goods shaped from clay-silica mixes. This product is classified under tariff item 6902.90.00 as a refractory ceramic constructional good.
Andalusite Refractory Bricks
Andalusite refractory bricks are fired ceramic constructional goods that incorporate andalusite to form mullite, offering excellent thermal shock resistance for coke ovens and reheat furnaces. Their dimensional stability and high-temperature performance place them under this tariff item for other refractory bricks.
Andalusite Refractory Tile
Andalusite refractory tiles are fired from andalusite ore to produce a product with excellent thermal shock resistance, ideal for torpedo ladle linings in steel plants. The tiles are shaped and fired to withstand rapid temperature changes and slag attack. They are classified under tariff item 6902.90.00 as refractory ceramic constructional goods other than those of siliceous fossil meals.
Bauxite-Based Refractory Bricks
Bauxite-based refractory bricks are fired ceramic constructional goods made from calcined bauxite aggregate, providing economical high-duty performance for rotary cement kilns. Their spinel bonding developed during firing enhances slag penetration resistance, classifying them under this tariff item.