Harmonized System
U.S. imports of Heat-Insulating, Sound-Insulating & Sound-Absorbing Mineral Material Articles (HS 680690) totaled $18.4M in September 2026, imported from 45 countries.
Importers of Heat-Insulating, Sound-Insulating & Sound-Absorbing Mineral Material Articles paid $1.5M in duties in September 2026, an average duty rate of 9.14% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: September 2026 dataFabricated articles and mixtures of mineral insulating materials not covered by the more specific mineral wool or expanded mineral subheadings fall here, including molded calcium silicate pipe and block insulation (6806900020) and acoustic pads and boards of mineral materials (6806900010). Japan leads US imports under this heading, reflecting its advanced ceramics and specialty insulation manufacturing base, with Canada and Mexico also significant sources. The heading's NESOI (not elsewhere specified) scope means classification requires first ruling out more specific headings — particularly mineral wool forms (680610) and expanded mineral aggregates (680620) — before applying 680690.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
771 import shipments a month
Molded calcium silicate insulation — used for high-temperature pipe and equipment insulation in industrial plants — is specifically captured under 6806900020. It is distinct from mineral wool (heading 680610) because it is a rigid, molded calcium silicate matrix rather than a fibrous product. Importers should confirm the product is calcium silicate and not a fiber-reinforced composite, which could shift classification.
Composite insulation articles with facings (foil, fabric, or film) are classified by their essential character, which CBP typically determines based on the primary insulating component. If the mineral material provides the insulating function and the facing is merely protective or for installation purposes, the article generally remains in heading 6806. However, if the facing or jacket constitutes a significant structural element, classification may shift to another chapter. A licensed customs broker should be consulted for composite products.
ImportsExports
Imports
$18.4MYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $223.5M of Heat-Insulating, Sound-Insulating & Sound-Absorbing Mineral Material Articles.
Through September 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
Trade Directory
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Subheading 1 of 3 in heading 6806
Subheading 680690 · $18.4M of $36.8M
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 |
|---|---|---|---|---|---|
| 6806900090 | Mxtrs A Artcls of Heat/Snd Abs O Ins Mnrl Mtrl, Nes | $18.9M | 8.81% | 69.84% | $1.7M |
| 6806900020 | Mixtures and Articles of Molded Calcium Silicate | $709K | 10.12% | 100.00% | $72K |
| 6806900010 | Accoustical Pads&boards of Mineral Materials NESOI | $135K | 12.36% | 100.00% | $17K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6806900050 | Mxtrs A Art of Heat-Insl O Snd-Absrb Min Mtrl Nes | $60.2M |
| 6806900010 | Accoustical Pads&boards of Mineral Materials NESOI | $11.2M |
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 · September 2026
origin
South Korea pays 12.5% duty; Canada 0.1%.
customs district
destination
entry
rate provision · imports
26.9% enters free of duty; duty collected equals 9.14% of imports for consumption.