Isobutene-isoprene (butyl) rubber (IIR) (HS 400231)
Isobutene-isoprene (butyl) rubber (IIR) (HS 400231) has 754 U.S. import bill-of-lading shipment records between Dec 2019 and Aug 2026. The largest U.S. importer of Isobutene-isoprene (butyl) rubber (IIR) is INTERTEX WORLD RESOURCES INC, with 217 shipments, followed by ARP MATERIALS INC and ECHO ENGINEERING AND PRODUCTION SUPPLIES INC. The leading supplier is INTERTEX WORLD RESOURCES INC, with 190 shipments, followed by SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD and ARLANXEO SINGAPORE PTE LTD. Goods originate mainly from CHINA and INDIA, arriving primarily at NORFOLK, VA. Import volume has held steady 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/400231-isobutene-isoprene-butyl-rubber-iir
See all 754 shipments of HS 400231 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 Isobutene-isoprene (butyl) rubber (IIR) (HS 400231), by shipment volume. Hover a ribbon for details; click a name to open its profile.
The largest relationship is INTERTEX WORLD RESOURCES INC → INTERTEX WORLD RESOURCES INC with 190 shipments, followed by SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD → ECHO ENGINEERING AND PRODUCTION SUPPLIES INC (34) and RELIANCE SIBUR ELASTOMERS PRIVATE L THANE BELAPUR → AMERICAS INTERNATIONAL INC (14).
Top U.S. importers
| Importer | Shipments |
|---|---|
| INTERTEX WORLD RESOURCES INC | 217 |
| ARP MATERIALS INC | 40 |
| ECHO ENGINEERING AND PRODUCTION SUPPLIES INC | 36 |
| AMERICAS INTERNATIONAL INC | 26 |
| DONGAH TIRE AND RUBBER CO LTD | 14 |
| FENZI NORTH AMERICA INC | 13 |
| VIBRACOUSTIC USA CARMI MIXING DIVISION | 12 |
| INDUSTRIAS DE HULE GALGO S A | 11 |
| ROYAL ADHESIVES SEALANTS | 11 |
| TOP INTERNATIONAL LLC | 11 |
Top suppliers
| Supplier | Shipments |
|---|---|
| INTERTEX WORLD RESOURCES INC | 190 |
| SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD | 46 |
| ARLANXEO SINGAPORE PTE LTD | 42 |
| RELIANCE SIBUR ELASTOMERS PRIVATE L THANE BELAPUR | 40 |
| ARLANXEO CANADA INC | 32 |
| RELIANCE SIBUR ELASTOMERS PRIVATE L RELIANCE CORPORATE PARK 8A 1ST | 22 |
| RELIANCE SIBUR ELASTOMERS PRIVATE LIMITED | 18 |
| ARLANXEO SINGAPORE PTE | 16 |
| KOMMERLING CHEMISCHE FABRIK GMBH ZWEIBRUCKER | 14 |
| JINING QIANGKE PIPE ANTICORROSION MATERIALS CO LTD | 13 |
Origin countries
| Country | Shipments |
|---|---|
| CHINA | 139 |
| INDIA | 103 |
| CANADA | 90 |
| NETHERLANDS ANTILLES | 75 |
| BELGIUM | 74 |
| GERMANY | 72 |
| RUSSIA | 60 |
| SPAIN | 28 |
| JAPAN | 16 |
| TURKEY | 12 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| NORFOLK, VA | 172 |
| CHARLESTON, SC | 118 |
| HOUSTON, TX | 89 |
| NEW YORK/NEWARK AREA, NEWARK, NJ | 74 |
| LOS ANGELES, CA | 66 |
| TACOMA, WA | 63 |
| LONG BEACH, CA | 36 |
| SEATTLE, WA | 35 |
| BALTIMORE, MD | 29 |
| SAVANNAH, GA | 28 |
Harmonized System classification
HS code 400231 — Isobutene-isoprene (butyl) rubber (IIR). 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.
More products under HS 4002
Other six-digit codes in HS 4002: Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip, with their U.S. import volume.
Frequently asked questions about importing Isobutene-isoprene (butyl) rubber (IIR)
Who imports Isobutene-isoprene (butyl) rubber (IIR) (HS 400231)?
Based on U.S. Customs bill-of-lading records, the top U.S. importers of Isobutene-isoprene (butyl) rubber (IIR) include INTERTEX WORLD RESOURCES INC, ARP MATERIALS INC, ECHO ENGINEERING AND PRODUCTION SUPPLIES INC, AMERICAS INTERNATIONAL INC, and DONGAH TIRE AND RUBBER CO LTD.
Who is the largest U.S. importer of Isobutene-isoprene (butyl) rubber (IIR)?
INTERTEX WORLD RESOURCES INC is the largest U.S. importer of Isobutene-isoprene (butyl) rubber (IIR) (HS 400231), with 217 bill-of-lading shipment records.
Who are the top suppliers of Isobutene-isoprene (butyl) rubber (IIR)?
Leading suppliers shipping Isobutene-isoprene (butyl) rubber (IIR) (HS 400231) to the U.S. include INTERTEX WORLD RESOURCES INC, SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD, ARLANXEO SINGAPORE PTE LTD, RELIANCE SIBUR ELASTOMERS PRIVATE L THANE BELAPUR, and ARLANXEO CANADA INC.
How many U.S. shipments of Isobutene-isoprene (butyl) rubber (IIR) are there?
ImportDoor has 754 U.S. import shipment records under HS code 400231, spanning Dec 2019 to Aug 2026.
Where is Isobutene-isoprene (butyl) rubber (IIR) imported from?
Isobutene-isoprene (butyl) rubber (IIR) is imported into the U.S. primarily from CHINA, INDIA, and CANADA.
Find Isobutene-isoprene (butyl) rubber (IIR) importers & suppliers
Get the complete list of U.S. importers and global suppliers for HS 400231, with contact details and container-level shipment records on ImportDoor.
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