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HSChapter 68
U.S. imports of heat-insulating, sound-insulating & sound-absorbing mineral material articles (HS 680690) totaled $20.3M in April 2026, traded with 39 countries.
Importers of Heat-Insulating, Sound-Insulating & Sound-Absorbing Mineral Material Articles paid $1.6M in duties in April 2026 — an effective duty rate of 11% on $14.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Heat-Insulating, Sound-Insulating & Sound-Absorbing Mineral Material Articles imports of $20.3M in April 2026 ran 11% above the year-to-date monthly average of $18.4M.
Last updated: April 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.
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.
Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $1.5M | $10.1M | +$8.5M |
| MEXICO | $2.5M | $5.0M | +$2.6M |
| JAPAN | $5.0M | $415K | -$4.6M |
| UNITED KINGDOM | $685K | $2.4M | +$1.7M |
| GERMANY | $2.1M | $561K | -$1.6M |
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 6806900090 | MXTRS A ARTCLS OF HEAT/SND ABS O INS MNRL MTRL,NES | $19.7M | 11.42% | $1.6M |
| 6806900010 | ACCOUSTICAL PADS&BOARDS OF MINERAL MATERIALS NESOI | $437K | 11.25% | $44K |
| 6806900020 | MIXTURES AND ARTICLES OF MOLDED CALCIUM SILICATE | $234K | 11.80% | $28K |
MXTRS A ARTCLS OF HEAT/SND ABS O INS MNRL MTRL,NES
ACCOUSTICAL PADS&BOARDS OF MINERAL MATERIALS NESOI
MIXTURES AND ARTICLES OF MOLDED CALCIUM SILICATE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6806900050 | MXTRS A ART OF HEAT-INSL O SND-ABSRB MIN MTRL NES | $16.5M |
| 6806900010 | ACCOUSTICAL PADS&BOARDS OF MINERAL MATERIALS NESOI | $9.6M |
MXTRS A ART OF HEAT-INSL O SND-ABSRB MIN MTRL NES
2.0M kg
ACCOUSTICAL PADS&BOARDS OF MINERAL MATERIALS NESOI
6.6M m2
OTHR ARTS NESOI OF CMNT ETC
HS 681099
MARBLE, TRAVERTINE AND ALABASTER, WORKD, NESOI
HS 680291
WORDK MONUMENTAL OR BUILDING STONE, NESOI
HS 680299
GRANITE, NESOI
HS 680293
ABRASIVES ON A BASE MATERIAL OTH THN FABRC O PAPER
HS 680530
ARTICLES OF ASPHALT OR SIMILAR MATERIALS IN ROLLS
HS 680710
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $3.0M | $2.7M | -$261K |
| LOS ANGELES, CA | $5.1M | $519K | -$4.6M |
| LAREDO, TX | $1.2M | $4.4M | +$3.2M |