IIR Rubber Lump Blocks
Irregular lump blocks of isobutene-isoprene rubber for further processing into sheets, in primary bulk form. HTS 4002.39.00.00 as 'other' IIR, compliant with primary forms note excluding worked shapes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If natural rubber blend instead of fully synthetic
Mixtures with natural rubber primary products fall under 4001 per hierarchy.
If wear-damaged or manufacturing parings
Chapter Note 6 specifies unusable waste/parings for 4004.
If predominantly mineral oil-extended beyond rubber
Oil predominates, classifying as petroleum oil per material composition.
Not sure which classification is right?
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Import Tips & Compliance
• Photos and dimensions of lumps to prove 'blocks of irregular shape' status
• Test for recovery/elongation properties if synthetic rubber status questioned
• Avoid bulk shipments mislabeled as plates if cut rectangular
Related Products under HTS 4002.39.00.00
Butyl Rubber Latex Dispersion
A liquid dispersion of butyl rubber (IIR) in water, used for dipping and coating applications in manufacturing gloves and balloons. Classified under HTS 4002.39.00.00 as synthetic rubber in primary form (latex), meeting Chapter 40 note definitions for prevulcanized latex without prohibited compounding agents.
CIIR Powder Form
Micronized chlorobutyl rubber powder for compounding in adhesives, classified as primary form powder under HTS 4002.39.00.00. Meets Chapter 40 definitions for uncompounded synthetic rubber granules/powders.
Exxon Butyl 268 Rubber Pellets
Commercial ExxonMobil Butyl 268 grade IIR in pellet form for injection molding compounds. HTS 4002.39.00.00 for primary pellets of butyl rubber, free of disallowed additives.
Lanxess Bromobutyl BB2030
Lanxess BB2030 bromobutyl rubber in crumb form for tire curing bladders. Primary form under HTS 4002.39.00.00 as halo-isobutene-isoprene 'other'.
Chlorobutyl Rubber Scrap-Free Crumbs
Processed CIIR crumbs from calendaring, usable as primary input without waste status. HTS 4002.39.00.00 per note distinguishing bulk forms from scrap.
Butyl VM-6131 Masterbatch Pellets
Vista VM-6131 butyl pellets with minimal permitted stabilizers for pharma applications. Still primary under HTS 4002.39.00.00.