U.S. exports of Silicones in Primary Forms (SITC 57593) totaled $120.5M in August 2026.
Importers of Silicones in Primary Forms paid $7.1M in duties in August 2026, an average duty rate of 12.95% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Silicones in Primary Forms imports of $59.2M in August 2026 ran 17% above the year-to-date monthly average of $50.6M.
Last updated: August 2026 dataSilicones in primary forms — including polydimethylsiloxane (PDMS) fluids, silicone gums, resins, and elastomer bases — are high-performance specialty polymers with exceptional thermal stability, electrical insulation, and biocompatibility. These properties drive demand across electronics, automotive, aerospace, medical device, and personal care sectors. The primary-forms designation covers uncured or uncompounded silicone materials before conversion into sealants, adhesives, or molded parts, which are classified under separate headings. China is a major global producer of silicone intermediates, and importers sourcing from there should evaluate Section 301 tariff exposure as part of landed-cost calculations.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
2.9K import shipments a month
Primary forms are uncured, uncompounded, or unformulated silicone materials — fluids, gums, and base resins — that require further processing before end-use. Cured silicone sealants, adhesives, gaskets, and molded parts are classified under different headings covering articles of silicone or prepared adhesives. The physical state and degree of processing at the time of importation are the key classification determinants.
Silicone materials intended for use in medical devices or implants may be subject to FDA oversight under the Federal Food, Drug, and Cosmetic Act, particularly if they are components of a finished device. Importers should confirm the intended end-use and consult with regulatory counsel to determine whether FDA notification or device listing requirements apply.
Basic heading 44 of 465 in section 5
Basic heading 57593 · $120.5M of $26.2B
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Exports · August 2026
destination
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
$59.2MYoY · free account
Exports
$120.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $589.2M of Silicones in Primary Forms and exported $1.4B.
Through August 2026. Source: U.S. Census Bureau.