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HSChapter 39
U.S. imports of silicones in primary forms (HS 391000) totaled $51.9M in April 2026, traded with 50 countries.
Importers of Silicones in Primary Forms paid $7.3M in duties in April 2026 — an effective duty rate of 14% on $52.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataSilicones in primary forms — including polydimethylsiloxane fluids, gums, and resins — serve as foundational intermediates for adhesives, sealants, personal care formulations, and electronics encapsulants. Imports enter under a single 10-digit line (3910000000) and are subject to Section 301 tariffs when sourced from China, making origin tracking critical for cost management. Germany and Japan are the leading suppliers to the US market, with Canada also a significant source; the European and Japanese producers dominate high-purity specialty grades.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Imports of silicones in primary forms originating from China are subject to Section 301 tariffs. Importers sourcing from Germany, Japan, or Canada are not subject to those measures, making supplier origin a key cost variable.
All silicones in primary forms, regardless of viscosity or physical state (fluid, gum, elastomer base, or resin), consolidate into a single US tariff line (3910000000). Classification disputes typically arise when a silicone product has been further processed into a semi-finished article, which may shift it out of Chapter 39 entirely.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 3910000000 | SILICONES IN PRIMARY FORMS | $51.9M | 14.07% | $7.3M |
SILICONES IN PRIMARY FORMS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3910000000 | SILICONES IN PRIMARY FORMS | $123.9M |
SILICONES IN PRIMARY FORMS
12.0M kg
ARTICLES OF PLASTICS, NESOI
HS 392690
FLOOR, WALL, ETC COVERS, VINYL CHLORIDE POLYMERS
HS 391810
TABLEWARE AND KITCHENWARE OF PLASTICS
HS 392410
SACKS & BAGS (INCL CONES) OF POLYMERS OF ETHYLENE
HS 392321
HOUSEHOLD AND TOILET ARTICLES NESOI OF PLASTICS
HS 392490
PLATES, SHEETS ETC, NON-CELL ETC, POLYMER
HS 392010
| State | Imports | Exports | Balance |
|---|---|---|---|
| Michigan | $5.5M | $25.6M | +$20.1M |
| Kentucky | $2.9M | $22.7M | +$19.8M |
| California | $3.5M | $11.2M | +$7.7M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | $2.6M | $22.1M | +$19.5M |
| DETROIT, MI | $5.4M | $6.4M | +$1.0M |
| NEWARK, NJ | $9.7M | $1.8M | -$7.9M |