Other
Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of any product of heading 4001 with any product of this heading, in primary forms or in plates, sheets or strip: > Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or BIIR): > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified 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.
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.
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.
Polymerized Butyl Rubber Sheets
Thin, uncut rectangular sheets of plain butyl rubber from coagulation. HTS 4002.39.00.00 as primary sheet form, simply cut.
Isobutylene-Isoprene Rubber Paste
High-viscosity IIR paste for sealants, primary form paste. Under 4002.39.00.00.
Halo-Butyl Dispersion Liquid
Liquid halo-butyl dispersion for coatings. Primary liquid form HTS 4002.39.00.00.
CIIR Bulk Powder
Bulk CIIR powder for dry blending. HTS 4002.39.00.00 primary powder.
BIIR Irregular Lumps
Irregular BIIR lumps from polymerization. Primary lumps HTS 4002.39.00.00.
Halo-Butyl Rubber Granules
Granular form of chloroisobutene-isoprene rubber (CIIR) in bulk primary packaging, suitable for extrusion into tire inner liners. Falls under HTS 4002.39.00.00 as 'other' halo-butyl rubber in primary granule form per Chapter Note 3(b).
BIIR Rubber Bale
Brominated isobutene-isoprene rubber (BIIR) compressed into rectangular bales for storage and transport, used in pharmaceutical stoppers. HTS 4002.39.00.00 covers this as 'other' primary form bale of halo-butyl rubber, retaining raw material character.
Butyl Rubber Solution Paste
Viscous paste solution of butyl rubber in organic solvent for cement applications, primary form per note 3(a). Under HTS 4002.39.00.00 as uncompounded 'other' synthetic rubber dispersion.