Silicones in primary forms (HS 391000)
Silicones in primary forms (HS 391000) has 83,530 U.S. import bill-of-lading shipment records between Feb 2019 and Aug 2026. The largest U.S. importer of Silicones in primary forms is SHIN ETSU SILICONES OF AMERICA INC, with 2,973 shipments, followed by FLEXFAB LLC and DOW SILICONES CORP. The leading supplier is SHIN ETSU CHEMICAL CO LTD, with 3,118 shipments, followed by JENNY and HANGZHOU WELL TRANS SUPPLY CHAIN MA. 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 August 2026Cite as: ImportDoor, U.S. Customs bill of lading data (data through August 2026), https://www.importdoor.com/products/391000-silicones-in-primary-forms
See all 83,530 shipments of HS 391000 with dates, ports, consignees, filters and CSV export in the ImportDoor dashboard.
Open in dashboardShipments by month (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 2,844 shipments, followed by JENNY → GLOBAL ETRADE SERVICES INC (818) and JENNY → INTERNATIONAL BRIDGE (403).
Top U.S. importers
| Importer | Shipments |
|---|---|
| SHIN ETSU SILICONES OF AMERICA INC | 2,973 |
| FLEXFAB LLC | 1,139 |
| DOW SILICONES CORP | 892 |
| POLYPLEX USA LLC | 843 |
| GLOBAL ETRADE SERVICES INC | 820 |
| MOMENTIVE PERFORMANCE MATERIALS INC | 495 |
| CRIMSONLOGIC US INC | 433 |
| BRB NORTH AMERICA INC | 411 |
| INTERNATIONAL BRIDGE | 403 |
| WACKER CHEMICAL CORP | 385 |
Top suppliers
| Supplier | Shipments |
|---|---|
| SHIN ETSU CHEMICAL CO LTD | 3,118 |
| JENNY | 3,054 |
| HANGZHOU WELL TRANS SUPPLY CHAIN MA | 2,492 |
| YIWU DT SUPPLY CHAIN MANA NORTH SIDE OF CHUANGXIN | 2,469 |
| JINGYUAN | 1,824 |
| FANYF | 1,576 |
| ZHEJIANG JIELI DANXI | 1,345 |
| HAINAN GOLDEN SHELL CO LTD | 1,319 |
| TECH LINK SILICONES CO LTD | 927 |
| FLEXFAB DONGGUAN RUBBER PRODUCTS | 621 |
Origin countries
| Country | Shipments |
|---|---|
| CHINA | 61,030 |
| JAPAN | 3,056 |
| THAILAND | 2,568 |
| REPUBLIC OF KOREA | 1,682 |
| VIET NAM | 1,625 |
| HONG KONG | 1,596 |
| GERMANY | 1,557 |
| BELGIUM | 1,365 |
| INDIA | 1,235 |
| UNITED KINGDOM | 1,174 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| LONG BEACH, CA | 28,791 |
| LOS ANGELES, CA | 25,400 |
| NEW YORK/NEWARK AREA, NEWARK, NJ | 10,069 |
| TACOMA, WA | 3,457 |
| SAVANNAH, GA | 2,377 |
| HOUSTON, TX | 2,300 |
| NORFOLK, VA | 2,034 |
| SEATTLE, WA | 1,778 |
| CHARLESTON, SC | 1,620 |
| OAKLAND, CA | 1,542 |
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, POLYPLEX USA LLC, and GLOBAL ETRADE SERVICES INC.
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 2,973 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, JENNY, HANGZHOU WELL TRANS SUPPLY CHAIN MA, YIWU DT SUPPLY CHAIN MANA NORTH SIDE OF CHUANGXIN, and JINGYUAN.
How many U.S. shipments of Silicones in primary forms are there?
ImportDoor has 83,530 U.S. import shipment records under HS code 391000, spanning Feb 2019 to Aug 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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