U.S. imports of Worked Slate and Slate Articles (SITC 66132) totaled $2.6M in August 2026, imported from 25 countries.
Importers of Worked Slate and Slate Articles paid $416K in duties in August 2026, an average duty rate of 15.48% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Worked Slate and Slate Articles imports of $2.6M in August 2026 ran 21% below the year-to-date monthly average of $3.3M.
Last updated: August 2026 dataWorked slate and agglomerated slate articles occupy a distinct niche in the natural stone trade, valued for their cleft texture, low water absorption, and durability in roofing, flooring, and cladding applications. Classification hinges on whether the product is natural slate that has been cut, shaped, or surface-treated versus agglomerated slate (crushed slate bonded with resins or cement), as the two forms can attract different duty treatment. Importers should verify whether finished articles such as roofing tiles, wall panels, or decorative objects are classified here or under more specific building-products headings. Accurate country-of-origin documentation is essential given the range of global slate-producing regions.
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262 import shipments a month
Rough or merely split slate falls under earlier extraction-stage headings. 'Worked' slate has been further processed — cut to shape, surface-ground, beveled, or otherwise finished — and agglomerated slate is crushed slate reconstituted with a binder. The degree of processing determines which SITC or HTS heading applies, so importers should confirm the production method with the foreign supplier before filing entry.
Both roofing tiles and decorative panels of natural or agglomerated slate generally fall within this grouping, but the specific 10-digit HTS line can differ based on dimensions, surface finish, and end use. A licensed customs broker should review product specifications to confirm the correct tariff line and applicable duty rate.
Basic heading 498 of 766 in section 6
Basic heading 66132 · $2.6M of $27.0B
Imports · August 2026
origin
Spain and Brazil together supply 49% of it. China pays 37.8% duty; Canada 0.0%.
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
$2.6MYoY · free account
Exports
$449KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $40.2M of Worked Slate and Slate Articles and exported $4.1M.
Through August 2026. Source: U.S. Census Bureau.
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