Official data Source: US Census Bureau international trade data Data through August 2026 · updated monthly

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Mullite

In short

  • The US imported $10.3M of this product over the 12 months to August 2026, up 25% on the year before.
  • Canada is the largest supplier, with 49.3% of US imports; Germany is next, with 27.9%.
  • China has the lowest price, but landed at a US port with freight and duty Canada is cheaper: $1,619/tonne against $1,702/tonne.
  • Duty paid averaged 6.9% of the value of imports in August 2026, down 9.3 points on a year earlier.
  • Canada is gaining share: 63.5% over the last 12 months, up from 53.3%.
  • US exports were $10.0M over the last 12 months; the largest market is Mexico, with 68.6%.

US imports, Aug 2026

$814K

↓ −5.0% vs Aug 2025

Last 12 months

$10.3M

↑ +25% vs the 12 months before

Average duty paid

6.9%

↓ −9.3 pts vs Aug 2025

Top supplier

Canada

49.3% of US imports

US imports by month

The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAugDuty ↓
Show the numbers
MonthUS imports
August 2025$856K
September 2025$958K
October 2025$392K
November 2025$595K
December 2025$697K
January 2026$428K
February 2026$867K
March 2026$1.1M
April 2026$1.6M
May 2026$1.0M
June 2026$845K
July 2026$950K
August 2026$814K

What changed

  • US imports were $814K in August 2026, down 14% from July 2026 and down 5.0% from August 2025.
  • Over the 12 months to August 2026 they totalled $10.3M, up 25% on the 12 months before.
  • Biggest moves in market share since July 2026: Germany up from 8.8% to 27.9%, Canada down from 83.6% to 49.3%.
  • Average price from Canada fell 16% since July 2026, to $1,302/tonne.
  • Duty paid by the main suppliers held within 2 points of July 2026.

US trade by year

US imports were $10.3M in the 12 months to Aug 2026, up 63% on the 12 months to Aug 2017. US exports were $10.0M, up 0.9%. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

2017201820192020202120222023202420252026Duty ↑Duty ↓Duty ↓
Show the numbers
PeriodUS imports
12 months to Aug 2017$6.3M
12 months to Aug 2018$6.4M
12 months to Aug 2019$6.1M
12 months to Aug 2020$3.3M
12 months to Aug 2021$4.6M
12 months to Aug 2022$6.6M
12 months to Aug 2023$5.8M
12 months to Aug 2024$5.6M
12 months to Aug 2025$8.2M
12 months to Aug 2026$10.3M
  • Canada
  • China
  • Germany
  • Hungary
  • All countries
Share of US imports
Show the numbers
PeriodCanadaChinaGermanyHungary
12 months to Aug 201732.1%0.1%51.1%6.9%
12 months to Aug 201857.1%6.2%25.2%2.2%
12 months to Aug 201954.1%8.9%22.5%1.9%
12 months to Aug 202022.8%14.9%39.1%7.4%
12 months to Aug 202152.8%25.1%6.8%9.1%
12 months to Aug 202243.3%23.0%17.5%8.1%
12 months to Aug 202349.1%18.9%16.2%9.6%
12 months to Aug 202438.1%28.0%25.3%4.9%
12 months to Aug 202553.3%16.2%19.7%4.8%
12 months to Aug 202663.5%14.3%13.5%5.7%
Duty paid, % of value
Show the numbers
PeriodCanadaChinaGermanyHungaryAll countries
12 months to Aug 20170.0%0.0%0.0%0.0%0.0%
12 months to Aug 20180.0%0.0%0.0%0.0%0.0%
12 months to Aug 20190.0%12.7%0.0%0.0%1.1%
12 months to Aug 20200.0%25.0%0.0%0.0%3.7%
12 months to Aug 20210.0%25.0%0.0%0.0%6.3%
12 months to Aug 20220.0%25.0%0.0%0.0%5.7%
12 months to Aug 20230.0%25.0%0.0%0.0%4.7%
12 months to Aug 20240.0%25.0%0.0%0.0%7.0%
12 months to Aug 20250.0%36.6%3.3%3.9%6.8%
12 months to Aug 20260.0%42.4%12.0%11.7%8.7%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$10.3M+25%8.7%+1.9 pts$10.0M+20%
12 months to Aug 2025$8.2M+46%6.8%−0.2 pts$8.3M−22%
12 months to Aug 2024$5.6M−2.8%7.0%+2.3 pts$10.7M−19%
12 months to Aug 2023$5.8M−12%4.7%−1.0 pts$13.3M+4.8%
12 months to Aug 2022$6.6M+42%5.7%−0.5 pts$12.7M+18%
12 months to Aug 2021$4.6M+40%6.3%+2.6 pts$10.7M+39%
12 months to Aug 2020$3.3M−46%3.7%+2.6 pts$7.7M−43%
12 months to Aug 2019$6.1M−4.6%1.1%+1.1 pts$13.5M−2.4%
12 months to Aug 2018$6.4M+2.1%0.0%0.0 pts$13.9M+39%
12 months to Aug 2017$6.3M0.0%$9.9M

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.

CountryUS importsShareAverage priceDuty paidLast 13 months
Canada$401K49.3%−9.2 pts$1,302/tonne−31%0.0%0.0 pts
Germany$227K27.9%+12.5 pts$2,392/tonne+3.4%10.0%−3.1 pts
Hungary$131K16.1%new$1,675/tonne10.0%
China$55K6.7%−19.1 pts$913.50/tonne+6.1%37.5%−17.5 pts
All countries$814K100.0%$1,504/tonne+1.9%6.9%−9.3 pts

The 3 largest suppliers had 91.3% of US imports over the last 12 months.

Landed cost by origin

What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.

  • Price
  • Freight and insurance
  • Duty
CountryPriceFreight and insuranceDutyLanded costMake-up
Canada$1,604/tonne$15.76/tonne1.0% of price$0.00/tonne0.0% of price$1,619/tonne+19%
China$913.50/tonne$461.00/tonne50.5% of price$327.34/tonne35.8% of price$1,702/tonne−3.4%
Hungary$1,710/tonne$153.21/tonne9.0% of price$171.01/tonne10.0% of price$2,034/tonne+17%
Germany$2,402/tonne$413.54/tonne17.2% of price$240.23/tonne10.0% of price$3,056/tonne−2.3%
All countries$1,605/tonne$120.80/tonne7.5% of price$77.93/tonne4.9% of price$1,804/tonne+9.3%

Landed at a US port, Canada was cheapest, at $1,619/tonne: 4.8% below China.

China had the lowest price before freight and duty, $913.50/tonne, but they added 86.3% to it.

Landed cost from Canada rose 19% on a year earlier, to $1,619/tonne, mostly on price: $1,348/tonne then, $1,604/tonne now.

How the market is shifting

Canada gained the most share: 63.5% of US imports over the last 12 months, up from 53.3% in the 12 months before. Germany lost the most: 13.5%, down from 19.7%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

  • Canada
  • China
  • Germany
  • Hungary
  • All countries
Share of US imports
Show the numbers
MonthCanadaChinaGermanyHungary
September 20240.0%41.8%39.6%16.2%
October 202421.1%44.8%26.8%0.0%
November 202462.6%27.0%5.9%0.0%
December 202411.9%0.0%62.8%0.0%
January 202554.0%15.0%16.0%0.0%
February 202529.2%19.6%18.3%4.4%
March 202564.2%0.0%18.6%16.4%
April 202574.9%9.4%13.3%1.8%
May 202561.9%0.0%19.5%14.6%
June 202573.9%22.9%0.0%0.0%
July 202553.5%12.2%29.0%3.2%
August 202558.5%25.8%15.4%0.0%
September 202562.4%19.9%8.1%7.5%
October 202528.9%26.2%30.9%0.0%
November 202565.3%0.0%8.0%3.5%
December 202528.9%32.9%27.9%10.2%
January 202654.3%36.8%0.0%6.3%
February 202679.0%11.9%8.5%0.6%
March 202658.8%14.2%22.5%2.5%
April 202675.5%9.6%8.7%6.3%
May 202666.7%20.5%7.4%2.7%
June 202667.7%13.0%11.9%3.2%
July 202683.6%0.0%8.8%7.7%
August 202649.3%6.7%27.9%16.1%
Duty paid, % of value
Show the numbers
MonthCanadaChinaGermanyHungaryAll countries
September 2024n/a25.0%0.0%0.0%10.4%
October 20240.0%25.0%0.0%n/a11.2%
November 20240.0%25.0%0.0%n/a6.7%
December 20240.0%n/a0.0%n/a0.0%
January 20250.0%25.0%0.0%n/a3.8%
February 20250.0%25.0%0.0%0.0%4.9%
March 20250.0%n/a0.0%0.0%0.0%
April 20250.0%45.0%0.0%0.0%4.2%
May 20250.0%n/a7.5%10.0%3.3%
June 20250.0%55.0%n/an/a12.9%
July 20250.0%55.0%10.0%10.0%10.1%
August 20250.0%55.0%13.1%n/a16.3%
September 20250.0%55.0%15.0%15.0%13.5%
October 20250.0%55.0%15.0%n/a21.2%
November 20250.0%n/a15.0%15.0%4.8%
December 20250.0%45.0%15.0%15.0%20.5%
January 20260.0%45.0%n/a15.0%17.6%
February 20260.0%45.0%15.0%15.0%6.7%
March 20260.0%35.0%10.7%10.0%7.8%
April 20260.0%35.0%10.0%10.0%4.8%
May 20260.0%35.0%10.0%10.0%8.5%
June 20260.0%35.0%10.0%10.0%6.5%
July 20260.0%n/a10.0%10.0%1.6%
August 20260.0%37.5%10.0%10.0%6.9%

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

  1. January–February 2026 · Duty paid: China 55.0% → 40.0%, all countries 19.3% → 7.4%.
  2. May–July 2025 · Duty paid: China 25.0% → 55.0%, Germany 0.0% → 13.1%, all countries 3.8% → 14.8%.
  3. December 2024 · Duty paid: all countries 9.2% → 2.1%.
  4. July 2022 · Duty paid: all countries 8.3% → 2.3%.
  5. March 2021 · Duty paid: all countries 1.8% → 8.4%.
  6. September 2020 · Duty paid: all countries 0.6% → 9.0%.

Where it enters the US

Main ports of entry over the 12 months to August 2026: US imports and share.

  1. Buffalo-Niagara Falls, NY$6.7M · 65.6%
  2. Norfolk-Newport News, VA$1.7M · 16.6%
  3. Long Beach, CA$1.3M · 12.4%
  4. Savannah, GA$218K · 2.1%
  5. Los Angeles, CA$100K · 1.0%

Where US exports go

US exports were $801K in August 2026, down 6.8% from August 2025, and $10.0M over the last 12 months, up 20% on the 12 months before. Fastest-growing market with 3% or more of US exports: Canada, up 47%.

MarketLast 12 monthsSharevs 12 months before
Mexico$6.9M68.6%+23%
Germany$1.2M12.0%+35%
Canada$626K6.2%+47%
China$261K2.6%−43%
Brazil$199K2.0%+395%
Italy$158K1.6%−3.6%
France$154K1.5%−22%
United Kingdom$143K1.4%+146%
Other countries (11)$407K4.1%−17%
All countries$10.0M100.0%+20%

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 62 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.

MarketImportsvs year beforeFrom the USUS share
Poland$30.4Min 2025−5.5%$64K0.2%
Germany$19.5Min 2025+16%$10.7MUS records $1.1M55.0%
Korea, South$14.6Min 2025+1.7%$155K1.1%
Japan$9.7Min 2025+5.8%$3.3MUS records $63K33.6%
Mexico$7.7Min 2025−26%$7.6M98.8%
Italy$6.7Min 2025+45%$1.0MUS records $190K15.3%
India$5.3Min 2025+6.2%$383K7.3%
France$4.4Min 2025−17%$671K15.1%

The biggest market outside the US is Poland, which imported $30.4M of this product in 2025, 0.2% of that from the US.

The US supplies 98.8% of imports into Mexico, but under 10% into Poland, South Korea and India.

Other products under heading 2508: clays not elsewhere specified (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite (calcined or not); mullite; chamotte or dinas earths. US trade over the 12 months to August 2026.

About these figures
  • Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
  • US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
  • Average price is customs value divided by quantity (tonnes), across all of the product's 10-digit lines.
  • Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
  • Landed cost adds Census's import charges (freight, insurance and other costs of bringing the goods to the first US port) and calculated duty to the customs value, per unit, across the product's 10-digit lines. It leaves out antidumping and countervailing duties, customs fees and transport inland. Prices are averages across the goods within the code, so a lower one can mean cheaper goods, not the same goods for less.
  • Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
  • Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.

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