U.S. exports of Synthetic Rubber and Factice Derived from Oils, NES (SITC 23219) totaled $26.3M in August 2026.
Importers of Synthetic Rubber and Factice Derived from Oils, NES paid $1.2M in duties in August 2026, an average duty rate of 10.11% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataThe 'not elsewhere specified' category for synthetic rubber captures specialty elastomers and factice — a vulcanized oil product used as a rubber extender and processing aid — that do not fit the named polymer headings in the 232.1 group. Factice, produced by treating vegetable or mineral oils with sulfur or sulfur chloride, is used in pencil erasers, printing rollers, and cable insulation compounds, and its classification here rather than under chemical headings is a common source of importer confusion. Specialty thermoplastic elastomers (TPEs) and other novel synthetic rubbers that lack a dedicated heading may also fall here, making a binding ruling advisable for any product whose polymer identity is not clearly one of the named types.
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233 import shipments a month
Factice is produced by reacting drying or semi-drying oils (such as rapeseed or linseed oil) with sulfur or sulfur chloride rather than by polymerizing monomers. The result is a soft, spongy material used as a processing aid and extender in rubber compounds — particularly in erasers and printing rollers — rather than as a structural elastomer. Its oil-derived origin and non-polymerized structure distinguish it from all other synthetic rubbers in the 232 group.
A binding ruling is advisable whenever the product is a novel or proprietary elastomer — such as a thermoplastic vulcanizate (TPV), silicone-modified rubber, or specialty block copolymer — that does not clearly match the named polymer types (SBR, BR, IIR, CR, NBR, IR, EPDM). The NES heading is a residual category, and misclassification into or out of it can affect duty liability and trade-remedy exposure.
Basic heading 42 of 239 in section 2
Basic heading 23219 · $26.3M of $7.8B
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Exports · August 2026
destination
Japan and Belgium together take 47% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$12.3MYoY · free account
Exports
$26.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $132.7M of Synthetic Rubber and Factice Derived from Oils, NES and exported $301.5M.
Through August 2026. Source: U.S. Census Bureau.