Isobutene-isoprene (butyl) rubber (IIR) (HS 400231)
Isobutene-isoprene (butyl) rubber (IIR) (HS 400231) has 626 U.S. import bill-of-lading shipment records between Dec 2019 and May 2026. The largest U.S. importer of Isobutene-isoprene (butyl) rubber (IIR) is INTERTEX WORLD RESOURCES INC, with 156 shipments, followed by ARP MATERIALS INC and ECHO ENGINEERING AND PRODUCTION SUPPLIES INC. The leading supplier is INTERTEX WORLD RESOURCES INC, with 139 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 May 2026
Shipments over time (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 139 shipments, followed by SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD → ECHO ENGINEERING AND PRODUCTION SUPPLIES INC (34) and RELIANCE SIBUR ELASTOMERS PRIVATE L RELIANCE CORPORATE PARK 8A… → ARP MATERIALS INC (16).
Top U.S. importers
| Importer | Shipments |
|---|---|
| INTERTEX WORLD RESOURCES INC | 156 |
| ARP MATERIALS INC | 38 |
| ECHO ENGINEERING AND PRODUCTION SUPPLIES INC | 34 |
| AMERICAS INTERNATIONAL INC | 22 |
| VIBRACOUSTIC USA CARMI MIXING DIVISION | 14 |
Top suppliers
| Supplier | Shipments |
|---|---|
| INTERTEX WORLD RESOURCES INC | 139 |
| SHANDONG SHUANGYUAN SEALING TECHNOLOGY CO LTD | 45 |
| ARLANXEO SINGAPORE PTE LTD | 37 |
| RELIANCE SIBUR ELASTOMERS PRIVATE L THANE BELAPUR | 32 |
| RELIANCE SIBUR ELASTOMERS PRIVATE L RELIANCE CORPORATE PARK 8A 1ST | 22 |
Origin countries
| Country | Shipments |
|---|---|
| CHINA | 131 |
| INDIA | 89 |
| CANADA | 69 |
| BELGIUM | 60 |
| GERMANY | 57 |
| NETHERLANDS ANTILLES | 52 |
| RUSSIA | 48 |
| SPAIN | 27 |
| JAPAN | 16 |
| TURKEY | 12 |
Ports of unlading
| U.S. port | Shipments |
|---|---|
| NORFOLK, VA | 147 |
| CHARLESTON, SC | 88 |
| NEW YORK/NEWARK AREA, NEWARK, NJ | 64 |
| HOUSTON, TX | 63 |
| LOS ANGELES, CA | 58 |
| TACOMA, WA | 51 |
| LONG BEACH, CA | 34 |
| SEATTLE, WA | 32 |
| BALTIMORE, MD | 28 |
| SAVANNAH, GA | 26 |
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.
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 VIBRACOUSTIC USA CARMI MIXING DIVISION.
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 156 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 RELIANCE SIBUR ELASTOMERS PRIVATE L RELIANCE CORPORATE PARK 8A 1ST.
How many U.S. shipments of Isobutene-isoprene (butyl) rubber (IIR) are there?
ImportDoor has 626 U.S. import shipment records under HS code 400231, spanning Dec 2019 to May 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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