HS 4002-31-00-00 – Isobutene-isoprene (butyl) rubber (IIR)

Tariff data as of T2026-2, effective Sept 1, 2026, last verified Oct 21, 2026

Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of any product of heading 40.01 with any product of this heading, in primary forms or in plates, sheets or strip. › Isobutene-isoprene (butyl) rubber (IIR) › Isobutene-isoprene (butyl) rubber (IIR)

MFN duty rate

Free

GST

5%

Unit of measure

KGM

Isobutene-isoprene (butyl) rubber (IIR)

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Preferential tariff rates

• UST/CUSMA (US): Free
• Korea: Free
• Israel (CIAT): Free
• Colombia: Free
• Chile: Free
• Peru: Free
• Ukraine: Free
• Norway (NT): Free
• Switzerland–Liechtenstein (SLT): Free
• Costa Rica (CRT): Free
• UK: Free
• CPTPP – United Kingdom (CPUKT): Free
• Jordan (JT): Free
• CPTPP: Free
• Honduras (HNT): Free
• Panama (PAT): Free
• GPT: Free
• CETA: Free
• Iceland: Free
• MXT/CUSMA (Mexico): Free
• LDCT: Free
• Commonwealth Caribbean Countries Tariff (CCCT): Free

Preference requires qualifying origin and origin proof or certification.

Frequently asked questions

What is the MFN duty on Isobutene-isoprene (butyl) rubber (IIR) (HS 4002-31-00-00)?

The T2026-2 MFN rate for tariff item 4002.31.00 is Free. Specific or compound rates require manual calculation. Classification and origin must be verified with CBSA.

What is the duty on HS 4002-31-00-00 from the US?

Qualifying US-origin goods with origin proof use UST/CUSMA at Free. This item is not on any US surtax schedule in force in TariffPlus surtax data (checked against CBSA). GST/HST and any applicable personal-import provincial tax are additional.

Which trade agreement rates apply to HS 4002-31-00-00?

UST/CUSMA (US): Free; Korea: Free; Israel (CIAT): Free; Colombia: Free; Chile: Free; Peru: Free; Ukraine: Free; Norway (NT): Free; Switzerland–Liechtenstein (SLT): Free; Costa Rica (CRT): Free; UK: Free; CPTPP – United Kingdom (CPUKT): Free; Jordan (JT): Free; CPTPP: Free; Honduras (HNT): Free; Panama (PAT): Free; GPT: Free; CETA: Free; Iceland: Free; MXT/CUSMA (Mexico): Free; LDCT: Free; Commonwealth Caribbean Countries Tariff (CCCT): Free. Preferential treatment requires qualifying origin and certification. Rates are informational; CBSA is authoritative.