Standard International Trade Classification
U.S. exports of Prepared Rubber Accelerators (SITC 59863) totaled $4.9M in August 2026.
Importers of Prepared Rubber Accelerators paid $548K in duties in August 2026, an average duty rate of 22.80% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Prepared Rubber Accelerators imports of $2.4M in August 2026 ran 19% above the year-to-date monthly average of $2.0M.
Last updated: August 2026 dataRubber accelerators are organic or inorganic compounds that dramatically shorten vulcanization time and improve the physical properties of cured rubber, and prepared formulations — blends or masterbatches ready for direct incorporation — are the commercially dominant form traded internationally. Major chemical families include thiazoles, sulfenamides, thiurams, dithiocarbamates, and guanidines, each offering different cure speed, scorch safety, and compatibility profiles suited to tire, automotive seal, footwear, and industrial rubber goods manufacturing. Several accelerator chemistries — particularly thiurams and dithiocarbamates — face regulatory scrutiny in some markets due to nitrosamine formation potential, a compliance consideration that affects product selection and documentation requirements for export-oriented rubber goods producers.
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65 import shipments a month
The principal families are sulfenamides (e.g., CBS, TBBS) for delayed-action, scorch-safe curing preferred in tire compounds; thiazoles (e.g., MBT, MBTS) for general-purpose applications; thiurams for ultra-fast or sulfur-donor curing; dithiocarbamates for low-temperature or latex applications; and guanidines as secondary accelerators. Selection depends on cure temperature, processing safety window, and the end-product's dynamic performance requirements.
Yes. Thiuram and dithiocarbamate accelerators can generate nitrosamines during processing or in the finished article, which has led to restrictions or labeling requirements in the EU and other jurisdictions. US importers supplying rubber goods to European customers should verify that accelerator choices comply with applicable REACH restrictions and customer specifications, and should request safety data sheets and composition disclosures from suppliers.
Basic heading 300 of 465 in section 5
Basic heading 59863 · $4.9M of $26.2B
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Exports · August 2026
destination
China and Mexico together take 50% 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
$2.4MYoY · free account
Exports
$4.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $22.2M of Prepared Rubber Accelerators and exported $66.1M.
Through August 2026. Source: U.S. Census Bureau.