What is HS code 400231 used for?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-6 · Subheading
400231
Rubber; synthetic, isobutene-isoprene (butyl) rubber (IIR), in primary forms or in plates, sheets or strip
Heading 4002 — Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of heading no. 4001 and 4002, in primary forms or in plates, sheets or strip
Chapter 40: Rubber and articles thereof
Plain-language overview
Use HS-6 400231 when importing or exporting synthetic isobutene-isoprene (butyl) rubber in primary forms, such as sheets or strips. For example, a shipment of butyl rubber sheets used in tire manufacturing falls under this code.
This code specifically applies to synthetic rubber, distinguishing it from natural rubber and other synthetic varieties. For instance, HS-6 400239 covers other types of synthetic rubber, which may not be suitable for the same applications as butyl rubber.
When classifying products, note that HS-6 400231 is for butyl rubber in its primary form, while HS-6 400261 refers to mixtures involving natural rubber. Understanding these distinctions is crucial for accurate classification and compliance.
If you're dealing with butyl rubber sheets used for sealing applications in automotive parts or as a lining material in industrial containers, this HS code is appropriate. It’s essential to ensure your product specifications align with this classification.
Keywords & topics
Useful terms traders and brokers use for this HS-6 subheading.
synthetic rubber classification · butyl rubber sheets · HS code for rubber · primary forms of rubber · automotive rubber products · industrial rubber applications · butyl rubber uses · rubber import regulations · customs classification rubber · synthetic rubber shipments · rubber export documentation · rubber product specifications
Examples
Drawn from the official tariff wording for this HS-6 subheading. Always confirm against your published schedule and legal notes.
- Sheets of butyl rubber for tire production
- Strips of synthetic rubber used in automotive gaskets
- Primary forms of butyl rubber for soundproofing applications
- Rolls of butyl rubber for roofing membranes
- Extruded butyl rubber profiles for window seals
- Butyl rubber sheets used in medical device manufacturing
- Synthetic rubber strips for insulation in electrical applications
Common questions
Frequent classification questions with short practical guidance.
How to classify butyl rubber for customs?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
Are there different types of synthetic rubber?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What products fall under HS-6 400231?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How to import synthetic rubber sheets?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What are the uses of butyl rubber?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Can I use HS-6 400231 for rubber strips?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What is the difference between butyl rubber and other synthetic rubbers?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Related topics
Common real-world topics that come up during code comparison.
how to classify butyl rubber for import
Check the exact product specs and destination-country tariff notes before finalizing the code.
examples of products under HS code 400231
Use this topic to narrow your shortlist, then validate the final code against legal wording.
what is the application of synthetic rubber sheets
Use this topic to narrow your shortlist, then validate the final code against legal wording.
guidelines for importing synthetic rubber
Check the exact product specs and destination-country tariff notes before finalizing the code.
differences between butyl rubber and natural rubber
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
how to determine the correct HS code for rubber products
Use this topic to narrow your shortlist, then validate the final code against legal wording.
customs requirements for synthetic rubber imports
Check the exact product specs and destination-country tariff notes before finalizing the code.
best practices for shipping butyl rubber
Use this topic to narrow your shortlist, then validate the final code against legal wording.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What types of products are classified under HS-6 400231?
- HS-6 400231 covers synthetic isobutene-isoprene (butyl) rubber in primary forms, such as sheets and strips, used in various applications including tires and seals.
- How do I know if my rubber product falls under this HS code?
- Check if your product is synthetic butyl rubber in primary form. If it is, then HS-6 400231 is likely the correct classification.
- Can I use HS-6 400231 for rubber mixtures?
- No, HS-6 400231 specifically applies to pure butyl rubber. For mixtures, you may need to look at other codes like HS-6 400261.
- What documentation do I need for importing butyl rubber?
- Ensure you have a detailed product description, invoices, and any necessary certificates of origin or compliance for customs clearance.
- Is there a difference between butyl rubber and other synthetic rubbers?
- Yes, butyl rubber is specifically made from isobutene and isoprene, offering unique properties like low permeability to gases, unlike other synthetic rubbers.
- What are common applications for butyl rubber?
- Common applications include tire manufacturing, automotive gaskets, soundproofing materials, and roofing membranes.
Continue classification
Parent context
Nearby siblings
Next best action
Pick one of these actions to move from reading to a defensible classification decision.