Diatomaceous Earth Ceramic Insulating Brick from United States
A solid fired brick incorporating diatomaceous earth, a siliceous material, to provide high-temperature insulation in building envelopes. It is shaped and fired after shaping, meeting the Chapter 69 definition of ceramic products. It is classified under tariff item 6904.10.00 as a building brick.
Duty Rate — United States → Canada
3%
Import Tips
• Ensure the bricks are fired after shaping at temperatures above 800°C to qualify for Chapter 69
• Provide a certificate of origin if claiming preferential tariff treatment under a free trade agreement
• Keep records of the firing process in case the CBSA requests verification