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SITCSection 5
U.S. imports of silicones in primary forms (SITC 57593) totaled $51.9M in April 2026, traded with 50 countries.
Importers of Silicones in Primary Forms paid $7.3M in duties in April 2026 — an effective duty rate of 14% on $52.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 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.
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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.
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Monthly import values over time