Product classification
HS code for Silica bricks: 6902.20
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, containing by weight more than 50% of alumina (Al2o3), of silica (SiO2) or of a mixture or compound of these.
Classification of silica bricks under HS 6902.20
Silica bricks are classified under HS code 6902.20. This code is situated within Chapter 69, which encompasses ceramic products. Heading 6902 specifically covers refractory bricks, blocks, tiles, and similar refractory ceramic constructional goods. To qualify for subheading 6902.20, the product must contain more than 50% by weight of alumina (Al2O3), silica (SiO2), or a mixture/compound of these two substances. Silica bricks are essential in high-temperature industrial applications, such as glass melting furnaces and coke ovens, due to their high melting point and structural stability. The classification depends on the refractory nature of the goods, meaning they must be able to withstand temperatures exceeding 1,500 degrees Celsius without melting or losing their shape in the specific industrial environment for which they are designed.
- Covers
- Refractory silica bricks
- Silica-alumina refractory blocks
- High-silica furnace lining tiles
- Acid-resistant refractory bricks
- Silica checker bricks for heat regenerators
- Also under 6902.20
- Saint-Gobain high-alumina refractories
- HarbisonWalker International fireclay bricks
- Morgan Advanced Materials mullite products
- Shinagawa Refractories silica bricks
Codes often confused with 6902.20
Common mistake. A frequent misclassification occurs with HS code 6901.00, which covers bricks and blocks made of siliceous fossil meals (like kieselguhr or diatomite). While both contain silica, 6901 is specific to fossil-based materials that are lightweight and insulating, whereas 6902.20 is for heavy refractory materials. Another common error is using 6904.10, which is for standard ceramic building bricks. Standard building bricks do not possess the refractory properties required for Chapter 6902. Furthermore, non-ceramic silica blocks might be confused with 6815.99, but if the product is fired ceramic, 6902.20 is the correct designation.
Top exporters and importers of HS 690220 (the code used for silica bricks), 2025
In 2025, the largest exporter of HS 690220 (the code used for silica bricks) in UN Comtrade data was China, with 35% of world exports; the largest importer in UN Comtrade data was the United States, with 7.9% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 690220, not only silica bricks.
Top exporters 2025 · share of world exports
- 1 China $682M 35% of world exports
- 2 Germany $267M 14% of world exports
- 3 India $150M 7.6% of world exports
World total: $2.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $150M 7.9% of world imports
- 2 India $144M 7.6% of world imports
- 3 Germany $86M 4.5% of world imports
World total: $1.9B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for silica bricks
Brazil splits HS 6902.20 into 5 NCM codes. Pick the one that matches your product:
- 6902.20.10Silico-aluminous refractory bricks
- 6902.20.91Other silico-aluminous refractory goods
- 6902.20.92Siliceous, semi-siliceous or silica refractories
- 6902.20.93Sillimanite refractory goods
- 6902.20.99Other refractories over 50% alumina and/or silica
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about silica bricks
What is the HS code for Silica bricks?
The HS code for Silica bricks is 690220 (Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight more than 50% of alumina (Al2o3), of silica (SiO2) or of a mixture or compound of these). Silica bricks used for refractory purposes are classified under HS code 6902.20.
How do I classify Silica bricks for customs?
Silica bricks is classified under HS code 690220 — Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight more than 50% of alumina (Al2o3), of silica (SiO2) or of a mixture or compound of these. This is a 6-digit subheading level code.
What is the difference between HS 6901 and 6902.20?
HS 6901 is for goods made from siliceous fossil meals (insulating), while 6902.20 is for refractory goods containing over 50% silica or alumina designed for high-heat structural use.
Which countries are the top exporters of silica bricks (HS 690220)?
In 2025, the top exporters of HS 690220 (the code used for silica bricks) in UN Comtrade data were China ($682M, 35% of world exports), Germany ($267M) and India ($150M). World exports came to about $2.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of silica bricks (HS 690220)?
In 2025, the top importers of HS 690220 (the code used for silica bricks) in UN Comtrade data were the United States ($150M, 7.9% of world imports), India ($144M) and Germany ($86M). World imports came to about $1.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Silica bricks the same in all countries?
The base HS code 690220 for Silica bricks is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for silica bricks in Brazil?
Brazil splits HS 690220 into 5 NCM codes, so the right one for silica bricks depends on the product's details: 6902.20.10 (Silico-aluminous refractory bricks), 6902.20.91 (Other silico-aluminous refractory goods), 6902.20.92 (Siliceous, semi-siliceous or silica refractories), 6902.20.93 (Sillimanite refractory goods), 6902.20.99 (Other refractories over 50% alumina and/or silica).