Subheading · Chapter 40 · Heading 4002
4002.31: Isobutene-isoprene (butyl) rubber (IIR)
Subheading 4002.31 belongs to heading 4002 (synthetic rubber and factice derived from oils, in primary forms or in plates…) in chapter 40.
What you pay
Importing into UK
Rates by national line · UK Global Tariff
UK lines →- 4002 31 00 00 Isobutene-isoprene (butyl) rubber (iir) Free
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 2
- Additional dutyAdditional duties 35%
- Applies to goods from
- Belarus, Russia
- Legal act
- 2022 No. 598
- Documents
- 9014
- Duty suspensionSuspension - goods for certain categories of ships, boats and other vessels and for drilling or production platforms Free
- Applies to goods from
- all countries
- Legal act
- 2020 No. 1431
- Documents
- C990 End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)
Import requirements 2
- Import controlRestriction on entry into free circulation
- Applies to goods from
- Russia, Ukraine
- Legal act
- 2023 No. 440, S.I. 2022/395
- Documents
- 9011
- 9022
- 9038
- 9009
- 9010
- 9017
- Import controlImport control - Waste
- Applies to goods from
- all countries
- Legal act
- S.I. 2019/590
- Documents
- C672 Information document accompanying shipments of waste as mentioned in Regulation (EU) 2024/1157 – Article 18 and Annex VII
- C669 Notification document as mentioned in Regulation (EU) 2024/1157 - Article 5 and Annex IA
- Y923 Product not subjected to the provisions of Regulation (EU) 2024/1157
- C670 Movement document as mentioned in Regulation (EU) 2024/1157 – Article 5 and Annex IB
Preferential rates by country
| Agreement or scheme | Countries | Rate |
|---|---|---|
| standard rate (no agreement) | — | Free |
| DCTS Comprehensive | Afghanistan, Angola, Bangladesh, Benin and 38 moreAfghanistan, Angola, Bangladesh, Benin, Bhutan, Burkina Faso, Burundi, Cambodia, Central African Republic, Chad, Comoros, Congo - Kinshasa, Djibouti, Eritrea, Ethiopia, Gambia, Guinea, Guinea-Bissau, Haiti, Kiribati, Laos, Liberia, Malawi, Mali, Mauritania, Myanmar (Burma), Nepal, Niger, Rwanda, São Tomé & Príncipe, Senegal, Sierra Leone, Somalia, South Sudan, Sudan, Tanzania, Timor-Leste, Togo, Tuvalu, Uganda, Yemen, Zambia | Free |
| European Union (including code "EU") | Free | |
| DCTS Enhanced | Algeria, Bolivia, Cape Verde, Congo - Brazzaville and 13 moreAlgeria, Bolivia, Cape Verde, Congo - Brazzaville, Cook Islands, Kyrgyzstan, Micronesia, Mongolia, Nigeria, Niue, Pakistan, Philippines, Sri Lanka, Syria, Tajikistan, Uzbekistan, Vanuatu | Free |
| CARIFORUM | Antigua & Barbuda, Bahamas, Barbados, Belize and 10 moreAntigua & Barbuda, Bahamas, Barbados, Belize, Dominica, Dominican Republic, Grenada, Guyana, Jamaica, St Kitts & Nevis, St Lucia, St Vincent & the Grenadines, Suriname, Trinidad & Tobago | Free |
| OCTs (Overseas Countries and Territories) | Anguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands and 7 moreAnguilla, Bermuda, British Indian Ocean Territory, British Virgin Islands, Cayman Islands, Falkland Islands, Montserrat, Pitcairn Islands, South Georgia & South Sandwich Islands, St Helena, Turks & Caicos Islands | Free |
| Central America | Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, Panama | Free |
| SADC EPA | Botswana, Eswatini, Lesotho, Mozambique, Namibia | Free |
| Eastern and Southern Africa States | Madagascar, Mauritius, Seychelles, Zimbabwe | Free |
| CPTPP | Brunei, Malaysia | Free |
| UK–Andorra agreement | Andorra | Free |
| UK–Albania agreement | Albania | Free |
| UK–Australia agreement | Australia | Free |
| UK–Canada agreement | Canada | Free |
| UK–Switzerland agreement | Switzerland | Free |
| UK–Côte d’Ivoire agreement | Côte d’Ivoire | Free |
| UK–Chile agreement | Chile | Free |
| UK–Cameroon agreement | Cameroon | Free |
| UK–Colombia agreement | Colombia | Free |
| UK–Ceuta & Melilla agreement | Ceuta & Melilla | Free |
| UK–Ecuador agreement | Ecuador | Free |
| UK–Egypt agreement | Egypt | Free |
| UK–Fiji agreement | Fiji | Free |
| UK–Faroe Islands agreement | Faroe Islands | Free |
| UK–Georgia agreement | Georgia | Free |
| UK–Ghana agreement | Ghana | Free |
| DCTS Standard | Indonesia | Free |
| UK–Israel agreement | Israel | Free |
| UK–India agreement | India | Free |
| UK–Iceland agreement | Iceland | Free |
| UK–Jordan agreement | Jordan | Free |
| UK–Japan agreement | Japan | Free |
| UK–Kenya agreement | Kenya | Free |
| UK–South Korea agreement | South Korea | Free |
| UK–Lebanon agreement | Lebanon | Free |
| UK–Liechtenstein agreement | Liechtenstein | Free |
| UK–Morocco agreement | Morocco | Free |
| UK–Moldova agreement | Moldova | Free |
| UK–North Macedonia agreement | North Macedonia | Free |
| UK–Mexico agreement | Mexico | Free |
| UK–Norway agreement | Norway | Free |
| UK–New Zealand agreement | New Zealand | Free |
| UK–Peru agreement | Peru | Free |
| UK–Papua New Guinea agreement | Papua New Guinea | Free |
| UK–Palestinian Territories agreement | Palestinian Territories | Free |
| UK–Serbia agreement | Serbia | Free |
| UK–Solomon Islands agreement | Solomon Islands | Free |
| UK–Singapore agreement | Singapore | Free |
| UK–San Marino agreement | San Marino | Free |
| UK–Tunisia agreement | Tunisia | Free |
| UK–Türkiye agreement | Türkiye | Free |
| UK–Ukraine agreement | Ukraine | Free |
| UK–Vietnam agreement | Vietnam | Free |
| UK–Samoa agreement | Samoa | Free |
| UK–Kosovo agreement | Kosovo | Free |
| UK–South Africa agreement | South Africa | Free |
UK: imports by month
Main suppliers, last 12 months
| Country | Value | Share | Change |
|---|---|---|---|
 China | £1.3m | 42% | -20% |
 United States | £855k | 27.4% | -26.3% |
 Belgium | £230k | 7.4% | +9.3% |
 India | £217k | 7% | +18.7% |
 Canada | £194k | 6.2% | +61.6% |
 Poland | £182k | 5.8% | +8.1% |
 Singapore | £54k | 1.7% | -48.2% |
 Germany | £52k | 1.7% | -24.7% |
Same subheading in other tariffs
TürkiyeWorld trade in 2024
Trade value (US$) no reported trade < US$180kUS$180k+US$2m+US$40m+> US$98m
Exports: 67
- Russia: US$197m
- Singapore: US$98m
- China: US$88m
- United States: US$52m
- India: US$41m
- Saudi Arabia: US$41m
- Canada: US$40m
- Belgium: US$37m
- Japan: US$22m
- Netherlands: US$10m
- Poland: US$6m
- Germany: US$5m
- Switzerland: US$5m
- France: US$4m
- United Kingdom: US$3m
- Lithuania: US$2m
- Hungary: US$2m
- Denmark: US$2m
- Türkiye: US$2m
- Mexico: US$2m
- Italy: US$1m
- Latvia: US$1m
- South Korea: US$1m
- Malaysia: US$801k
- United Arab Emirates: US$647k
- Thailand: US$645k
- Hong Kong SAR China: US$561k
- Taiwan: US$506k
- Malta: US$490k
- Croatia: US$386k
- Vietnam: US$231k
- Colombia: US$204k
- South Africa: US$180k
- Brazil: US$151k
- Czechia: US$117k
- Slovakia: US$103k
- Australia: US$91k
- Austria: US$74k
- Serbia: US$52k
- Ukraine: US$51k
- Portugal: US$49k
- Slovenia: US$39k
- Côte d’Ivoire: US$36k
- Spain: US$34k
- North Macedonia: US$34k
- Sweden: US$31k
- Ireland: US$28k
- Finland: US$21k
- Indonesia: US$20k
- Norway: US$19k
- Greece: US$9k
- Luxembourg: US$8k
- Curaçao: US$8k
- New Zealand: US$8k
- Bosnia & Herzegovina: US$7k
- Bulgaria: US$7k
- Chile: US$6k
- Romania: US$6k
- Kenya: US$6k
- Panama: US$5k
Trade value (US$) no reported trade < US$111kUS$111k+US$2m+US$8m+> US$26m
Imports: 138
- China: US$234m
- Thailand: US$60m
- Belgium: US$46m
- India: US$38m
- Indonesia: US$26m
- Germany: US$25m
- United States: US$24m
- Pakistan: US$22m
- South Korea: US$18m
- Vietnam: US$18m
- Italy: US$13m
- Luxembourg: US$11m
- Singapore: US$8m
- Poland: US$8m
- Türkiye: US$7m
- Brazil: US$7m
- South Africa: US$6m
- Japan: US$6m
- United Arab Emirates: US$6m
- Czechia: US$6m
- Malaysia: US$6m
- France: US$5m
- Mexico: US$5m
- Taiwan: US$5m
- Slovenia: US$5m
- United Kingdom: US$4m
- Netherlands: US$4m
- Canada: US$3m
- Serbia: US$3m
- Bangladesh: US$3m
- Argentina: US$3m
- Iran: US$3m
- Hungary: US$2m
- Australia: US$2m
- Lithuania: US$2m
- Colombia: US$2m
- Egypt: US$2m
- Austria: US$2m
- Latvia: US$1m
- Romania: US$1m
- Ukraine: US$1m
- Tunisia: US$962k
- New Zealand: US$942k
- Philippines: US$937k
- Sri Lanka: US$928k
- Spain: US$819k
- Finland: US$817k
- Croatia: US$688k
- Sweden: US$535k
- Denmark: US$498k
- Saudi Arabia: US$487k
- Chile: US$345k
- Dominican Republic: US$335k
- Ireland: US$334k
- Armenia: US$309k
- Slovakia: US$280k
- Algeria: US$270k
- Costa Rica: US$263k
- Norway: US$255k
- Portugal: US$227k
Top exporters
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 |  Russia | US$197m | 29.5% |
| 2 | Singapore | US$98m | 14.7% |
| 3 | China | US$88m | 13.2% |
| 4 | United States | US$52m | 7.8% |
| 5 | India | US$41m | 6.2% |
| 6 |  Saudi Arabia | US$41m | 6.1% |
| 7 | Canada | US$40m | 6% |
| 8 | Belgium | US$37m | 5.5% |
| 9 |  Japan | US$22m | 3.3% |
| 10 |  Netherlands | US$10m | 1.5% |
Top importers
| Rank | Country | Value | Share |
|---|---|---|---|
| 1 | China | US$234m | 35.2% |
| 2 |  Thailand | US$60m | 8.9% |
| 3 | Belgium | US$46m | 6.8% |
| 4 | India | US$38m | 5.8% |
| 5 |  Indonesia | US$26m | 4% |
| 6 | Germany | US$25m | 3.7% |
| 7 | United States | US$24m | 3.7% |
| 8 |  Pakistan | US$22m | 3.2% |
| 9 |  South Korea | US$18m | 2.7% |
| 10 |  Vietnam | US$18m | 2.6% |
Recent rule changes mentioning this code
Acts whose text cites this code or its heading. Check the act itself: a code can be cited for reasons other than a change of its duty.
-
Anti-dumping · Applies from: CELEX 32026R1540 · Source: eur-lex.europa.eu
- Sanctions · Applies from:
The Russia (Sanctions) (EU Exit) (Amendment) Regulations 2026
S.I. 2026/543 · Source: legislation.gov.uk
The UK Global Tariff has one tariff line for subheading 4002.31; the duty is duty-free.
Subheading 4002.31 is a single line in the EU Combined Nomenclature, where the duty is duty-free.
174 countries pay no duty in the UK thanks to trade agreements and preference schemes such as DCTS Comprehensive and European Union, against a standard rate of Free.
In the UK, additional duty of 35% applies on top of the customs duty to goods from Belarus and Russia.
Imports of these goods into the UK came to £3.1m between September 2025 and August 2026 (down 17% on the year before); China supplied 42%, followed by United States.
In 2024, countries exported these goods worth US$666m (+7.4% year on year).
The largest exporter was Russia (US$197m), followed by Singapore.
Questions and answers
What is the HS code for isobutene-isoprene (butyl) rubber (IIR)?
Isobutene-isoprene (butyl) rubber (IIR) fall under HS subheading 4002.31, part of heading 4002, in section VII of the Harmonized System.
What is the import duty on isobutene-isoprene (butyl) rubber (IIR) in the UK?
Under the UK Global Tariff, imports under 4002.31 from countries without a preferential agreement are free of duty. Preferential rates, anti-dumping duties and VAT are not included.
What is the import duty on isobutene-isoprene (butyl) rubber (IIR) in the EU?
Under the EU Combined Nomenclature, imports under 4002.31 from countries without a preferential agreement are free of duty. Preferential rates, anti-dumping duties and VAT are not included.
Which country exports the most isobutene-isoprene (butyl) rubber (IIR)?
Russia, with US$197m in 2024 (29.5% of world exports).
Which countries can export these goods to the UK duty-free?
174 countries pay no duty under a trade agreement or preference scheme, among them partners under DCTS Comprehensive, European Union, DCTS Enhanced. The goods must meet the agreement’s rules of origin and the importer needs proof of origin; otherwise the standard rate of Free applies. Pick a country above to see its rate.
Is there anti-dumping duty on these goods?
The UK charges additional duty of 35% on goods from Belarus and Russia. Lower rates apply to the named exporters listed in the measure.
Where does the UK import these goods from?
In the 12 months to August 2026, the largest suppliers were China (42%), United States (27%) and Belgium (7%), out of total imports of £3.1m.