Kaolin-Based Plastic Refractory Clay

Plastic refractory clay made from kaolin with plasticizers for forming dense linings in boilers and incinerators. It qualifies under HTS 3816.00.20.10 as a clay refractory mortar/concrete composition for high-heat resistance.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3%+35.0%38%
🇲🇽Mexico3%+10.0%13%
🇨🇦Canada3%+10.0%13%
🇩🇪Germany3%+10.0%13%
🇯🇵Japan3%+10.0%13%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3816.00.10.00Lower: 35% vs 38%

If based on aluminous cement

Aluminous cement-based refractories precede clay in 3816 hierarchy.

2507.00.00.00Lower: 35% vs 38%

If raw kaolin clay

Kaolin and other clays without refractory processing are Chapter 25 raw materials.

6901.00.00.00Lower: 35% vs 38%

If manufactured into clay blocks or tiles

Pressed or molded refractory clay products become Chapter 69 articles.

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Import Tips & Compliance

Conduct XRF analysis to document kaolin clay as primary constituent over 40%

Label as 'plastic refractory' with working temperature range to distinguish from pottery clay

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