U.S. imports of Building Blocks & Bricks of Cement, Concrete, or Artificial Stone (Whether or Not Reinforced) (HS 681011) totaled $5.8M in August 2026, imported from 14 countries.
Importers of Building Blocks & Bricks of Cement, Concrete, or Artificial Stone (Whether or Not Reinforced) paid $93K in duties in August 2026, an average duty rate of 1.61% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Building Blocks & Bricks of Cement, Concrete, or Artificial Stone (Whether or Not Reinforced) imports of $5.8M in August 2026 ran 27% above the year-to-date monthly average of $4.6M.
Last updated: August 2026 dataConcrete masonry units (CMUs) and similar structural blocks are the primary commercial products here, used across residential, commercial, and infrastructure construction. The US schedule includes a specialized line for magnesia-carbon bricks with high MgO content (6810110010) — a refractory product used in steelmaking furnaces — alongside standard building blocks (6810110070), making this heading unusually broad in its industrial reach. Canada and Mexico are the dominant suppliers for conventional CMUs, while Italy and India serve more specialized segments.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.0K import shipments a month
The HTS groups all building blocks and bricks of cement, concrete, or artificial stone under 681011 regardless of end use. Magnesia-carbon bricks with greater than 70% MgO and less than 30% chemical bond qualify for the specific line 6810110010 within this heading. Despite their refractory application in steelmaking, they meet the compositional definition of 'artificial stone' bricks under the chapter notes. Importers of refractory products should confirm the MgO content and bonding method in technical documentation to support the correct 10-digit classification.
Canadian-origin concrete building blocks that satisfy USMCA rules of origin are eligible for preferential tariff treatment. Importers must obtain a valid certificate or certification of origin and ensure the product meets the applicable regional value content or tariff-shift requirement under USMCA to claim the preference at entry.
Subheading 3 of 4 in heading 6810
Subheading 681011 · $5.8M of $188.2M
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 6810110070 | Bldg Blck & Brcks, Cmnt Cncrt Art St W O N Rein Nes | $5.8M | 1.61% | 9.25% | $93K |
| 6810110010 | Magnesa Carbn Brcks, Gt 70% Mgo, Lt 30% Chem Bond | $9K | 0.00% | 0.00% | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6810110000 | Bldg Blcks A Brcks of Cmnt Cncrt Art St W O N Rein | $2.7M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$5.8MYoY · free account
Exports
$2.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $52.5M of Building Blocks & Bricks of Cement, Concrete, or Artificial Stone (Whether or Not Reinforced) and exported $28.5M.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Canada and Mexico together supply 91% of it. China pays 40.7% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
90.8% enters free of duty; duty collected equals 1.61% of imports for consumption.