Silicones in primary forms (HS 391000)
Silicones in primary forms (HS 391000) has 74,878 U.S. import bill-of-lading shipment records between Feb 2019 and Jul 2026. The largest U.S. importer of Silicones in primary forms is SHIN ETSU SILICONES OF AMERICA INC, with 2,618 shipments, followed by FLEXFAB LLC and DOW SILICONES CORP. The leading supplier is SHIN ETSU CHEMICAL CO LTD, with 2,726 shipments, followed by YIWU DT SUPPLY CHAIN MANA NORTH SIDE OF CHUANGXIN and JENNY. Goods originate mainly from CHINA and JAPAN, arriving primarily at LONG BEACH, CA. Import volume has declined over the past 12 months versus the prior year.
Sourced from U.S. Customs bill of lading data · Updated monthly · Data through July 2026
Shipments over time (last 24 months)
Trade flow: top suppliers → U.S. importers
The strongest supplier-importer relationships for Silicones in primary forms (HS 391000), by shipment volume. Hover a ribbon for details; click a name to open its profile.
The largest relationship is SHIN ETSU CHEMICAL CO LTD → SHIN ETSU SILICONES OF AMERICA INC with 2,507 shipments, followed by JENNY → GLOBAL ETRADE SERVICES INC (772) and JINGYUAN → ADVANCED LOGISTICS SOLUTIONS LLC (212).
Top U.S. importers
| Importer | Shipments |
|---|---|
| SHIN ETSU SILICONES OF AMERICA INC | 2,618 |
| FLEXFAB LLC | 985 |
| DOW SILICONES CORP | 777 |
| GLOBAL ETRADE SERVICES INC | 774 |
| POLYPLEX USA LLC | 744 |
Top suppliers
| Supplier | Shipments |
|---|---|
| SHIN ETSU CHEMICAL CO LTD | 2,726 |
| YIWU DT SUPPLY CHAIN MANA NORTH SIDE OF CHUANGXIN | 2,469 |
| JENNY | 2,466 |
| HANGZHOU WELL TRANS SUPPLY CHAIN MA | 2,357 |
| JINGYUAN | 1,824 |
Origin countries
| Country | Shipments |
|---|---|
| CHINA | 55,169 |
| JAPAN | 2,691 |
| THAILAND | 2,226 |
| REPUBLIC OF KOREA | 1,454 |
| HONG KONG | 1,414 |
| VIET NAM | 1,411 |
| GERMANY | 1,364 |
| BELGIUM | 1,200 |
| INDIA | 1,093 |
| UNITED KINGDOM | 1,034 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| LONG BEACH, CA | 26,437 |
| LOS ANGELES, CA | 22,513 |
| NEW YORK/NEWARK AREA, NEWARK, NJ | 8,882 |
| TACOMA, WA | 3,007 |
| SAVANNAH, GA | 2,096 |
| HOUSTON, TX | 2,044 |
| NORFOLK, VA | 1,829 |
| SEATTLE, WA | 1,567 |
| CHARLESTON, SC | 1,430 |
| OAKLAND, CA | 1,410 |
Harmonized System classification
HS code 391000 — Silicones in primary forms. The Harmonized System is the international standard for classifying traded goods; U.S. Customs records this 6-digit code on every bill of lading.
Not sure this is the right code? Search all 5,700+ subheadings with the free HS code lookup, or see which product categories are growing in our quarterly State of U.S. Imports reports.
Frequently asked questions about importing Silicones in primary forms
Who imports Silicones in primary forms (HS 391000)?
Based on U.S. Customs bill-of-lading records, the top U.S. importers of Silicones in primary forms include SHIN ETSU SILICONES OF AMERICA INC, FLEXFAB LLC, DOW SILICONES CORP, GLOBAL ETRADE SERVICES INC, and POLYPLEX USA LLC.
Who is the largest U.S. importer of Silicones in primary forms?
SHIN ETSU SILICONES OF AMERICA INC is the largest U.S. importer of Silicones in primary forms (HS 391000), with 2,618 bill-of-lading shipment records.
Who are the top suppliers of Silicones in primary forms?
Leading suppliers shipping Silicones in primary forms (HS 391000) to the U.S. include SHIN ETSU CHEMICAL CO LTD, YIWU DT SUPPLY CHAIN MANA NORTH SIDE OF CHUANGXIN, JENNY, HANGZHOU WELL TRANS SUPPLY CHAIN MA, and JINGYUAN.
How many U.S. shipments of Silicones in primary forms are there?
ImportDoor has 74,878 U.S. import shipment records under HS code 391000, spanning Feb 2019 to Jul 2026.
Where is Silicones in primary forms imported from?
Silicones in primary forms is imported into the U.S. primarily from CHINA, JAPAN, and THAILAND.
Find Silicones in primary forms importers & suppliers
Get the complete list of U.S. importers and global suppliers for HS 391000, with contact details and container-level shipment records on ImportDoor.
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