Harmonized System
U.S. imports of Plates, Sheets & Strips of Agglomerated or Reconstituted Mica (HS 681410) totaled $2.1M in August 2026, imported from 20 countries.
Importers of Plates, Sheets & Strips of Agglomerated or Reconstituted Mica paid $527K in duties in August 2026, an average duty rate of 25.03% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Plates, Sheets & Strips of Agglomerated or Reconstituted Mica imports of $2.1M in August 2026 ran 29% above the year-to-date monthly average of $1.6M.
Last updated: August 2026 dataAgglomerated and reconstituted mica sheet products are engineered dielectric and thermal insulation materials widely used in electrical motors, heating elements, and high-voltage equipment. China dominates US import supply under this heading, with South Korea and Brazil also recorded as sources, reflecting the concentration of mica processing capacity in Asia. All imports enter under the single tariff line 6814100000, and Chinese-origin goods are subject to Section 301 tariffs — a meaningful cost factor given China's outsized share of global reconstituted mica production. Buyers should confirm whether the product is phlogopite- or muscovite-based, as this affects thermal performance specifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
91 import shipments a month
Both forms are manufactured from mica flakes or splittings bonded together, but 'reconstituted' mica typically refers to products made from mica paper (thin sheets of overlapping flakes) bonded with a resin or silicone binder, while 'agglomerated' mica uses larger fragments. For HTS purposes, both forms of plate, sheet, or strip fall under the single line 6814100000, so the distinction does not affect classification but does affect technical specifications relevant to end-use qualification.
China controls a large share of global mica processing and reconstituted mica sheet manufacturing, meaning that Section 301 tariff changes, export controls, or supply disruptions disproportionately affect US importers. South Korea and Brazil offer alternative sources, but their combined capacity is substantially smaller, and lead times for specialty grades can be longer. Buyers in the electrical insulation sector are advised to maintain safety stock or qualify secondary suppliers to manage this concentration risk.
Subheading 1 of 2 in heading 6814
Subheading 681410 · $2.1M of $3.5M
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 |
|---|---|---|---|---|---|
| 6814100000 | Pl Sh Str of Agglmrted or Rcnstd Mica | $2.1M | 25.03% | 97.97% | $527K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6814100000 | Pl Sh Str of Agglmrted or Rcnstd Mica | $919K |
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.
Imports · August 2026
origin
China and Bulgaria together supply 48% of it. China pays 42.1% duty; Bulgaria 10.0%.
customs district
destination
entry
rate provision · imports
2.0% enters free of duty; duty collected equals 25.03% of imports for consumption.
ImportsExports
Imports
$2.1MYoY · free account
Exports
$919KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $18.7M of Plates, Sheets & Strips of Agglomerated or Reconstituted Mica and exported $14.9M.
Through August 2026. Source: U.S. Census Bureau.