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SITCSection 5
U.S. exports of hydraulic brake fluids & prepared hydraulic transmission liquids (under 70% mineral oil) (SITC 59731) totaled $15.3M in July 2026.
Importers of Hydraulic Brake Fluids & Prepared Hydraulic Transmission Liquids (Under 70% Mineral Oil) paid $738K in duties in July 2026 — an effective duty rate of 14% on $5.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Basic heading 302 of 465 in section 5
Basic heading 59731 · $5.6M of $28.9B
Glycol-ether and borate-ester formulations dominate the brake fluid market covered by SITC 59731, which specifically captures prepared hydraulic fluids containing less than 70% petroleum or bituminous mineral oil by weight — the threshold that separates these products from petroleum-based hydraulic oils. DOT performance ratings (DOT 3, DOT 4, DOT 5.1) are the primary commercial specification differentiators for brake fluids, and these ratings influence both end-use suitability and buyer specifications in automotive aftermarket supply chains. The sub-70% mineral oil ceiling is a hard classification boundary, and importers of borderline formulations should obtain laboratory analysis to confirm compliance.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
250 shipments/mo
The 70% by-weight petroleum content threshold is the dividing line between this SITC heading and petroleum-based hydraulic oils. Formulations at or above 70% mineral oil content fall into a different classification with potentially different duty treatment. For blended or proprietary formulations, laboratory analysis of petroleum content is the standard method for confirming correct classification.
DOT ratings (DOT 3, DOT 4, DOT 5.1 for glycol-based fluids) are specified in FMVSS No. 116 and are often required on product labels and safety data sheets for US market entry. Importers should ensure that product documentation references the applicable DOT rating, as this affects both marketability and compliance with vehicle safety standards.
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Exports · July 2026
destination
Canada and Mexico 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
$5.6MYoY · Pro
Exports
$15.3MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.