U.S. imports of Unvulcanized Compounded Rubber with Carbon Black or Silica (SITC 62111) totaled $44.1M in August 2026, imported from 33 countries.
Importers of Unvulcanized Compounded Rubber with Carbon Black or Silica paid $2.3M in duties in August 2026, an average duty rate of 5.25% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Unvulcanized Compounded Rubber with Carbon Black or Silica imports of $44.1M in August 2026 ran 17% above the year-to-date monthly average of $37.7M.
Last updated: August 2026 dataCarbon black and silica are the dominant reinforcing fillers in rubber compounding, and their presence defines this classification — distinguishing it from other compounded rubber solutions or dispersions. Material in this heading arrives in primary forms (pellets, bales, granules) or as plates, sheets, or strip, all in the unvulcanized state, meaning the cross-linking cure has not yet occurred. These intermediates are critical feedstocks for tire manufacturers, industrial belt producers, and automotive sealing-system suppliers, where filler loading levels directly govern tensile strength and abrasion resistance.
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2.0K import shipments a month
Carbon black and silica are specifically named reinforcing agents that trigger a dedicated SITC subheading. Compounded rubber containing other fillers, or supplied as solutions and dispersions, falls under separate headings, so the filler type and physical form must both be confirmed before classification.
The heading covers primary forms (e.g., bales, pellets, granules) as well as plates, sheets, and strip — all unvulcanized. While the SITC heading groups these together, the corresponding HTS tariff schedule may subdivide by form, so importers should verify the specific HTS line applicable to their shipment's physical presentation.
Basic heading 136 of 766 in section 6
Basic heading 62111 · $44.1M of $27.0B
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Imports · August 2026
origin
Canada and Thailand together supply 74% of it. Brazil pays 37.5% duty; Mexico <0.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$44.1MYoY · free account
Exports
$44.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $456.5M of Unvulcanized Compounded Rubber with Carbon Black or Silica and exported $495.2M.
Through August 2026. Source: U.S. Census Bureau.