U.S. exports of Vitrifiable Enamels, Glazes & Engobes (Slips) (HS 320720) totaled $4.5M in August 2026.
Importers of Vitrifiable Enamels, Glazes & Engobes (Slips) paid $95K in duties in August 2026, an average duty rate of 2.88% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Vitrifiable Enamels, Glazes & Engobes (Slips) imports of $3.3M in August 2026 ran 19% below the year-to-date monthly average of $4.1M.
Last updated: August 2026 dataVitrifiable enamels, glazes, and engobes (slips) — classified under tariff line 3207200000 — are glass-forming preparations applied to ceramic, metal, or glass substrates and fused at high temperatures to create decorative or protective surfaces. Mexico leads US supply, followed by Spain and Italy, the latter two reflecting Europe's deep tradition in architectural and decorative tile production. The distinction between an engobe (a clay-based slip applied before firing) and a glaze (a glass-forming coating) matters for technical specification but not for HTS classification, as both fall within this single line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
172 import shipments a month
A vitrifiable enamel or glaze is specifically designed to fuse into a glassy layer when fired at elevated temperatures, forming a permanent bond with the substrate. Non-vitrifiable coatings that cure or dry without glass formation classify elsewhere — typically under heading 3208 or 3209 as paints or varnishes. The product's technical data sheet confirming its firing temperature and glass-forming chemistry is the key classification support.
Yes. Both engobes (clay-based slips) and vitrifiable glazes fall within 3207200000, so a mixed shipment of these ceramic preparation types can be entered under a single tariff line. Importers should ensure the commercial invoice clearly describes each product type to facilitate accurate CBP review.
Subheading 3 of 4 in heading 3207
Subheading 320720 · $4.5M of $23.0M
ImportsExports
Imports
$3.3MYoY · free account
Exports
$4.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $48.1M of Vitrifiable Enamels, Glazes & Engobes (Slips) and exported $57.4M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3207200000 | Vitrifiable Enamels & Glazes, Engobes(Slips), Etc | $3.3M | 2.88% | 18.92% | $95K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3207200000 | Vitrifiable Enamels & Glazes, Engobes(Slips), Etc | $4.5M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Trade Directory
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Exports · August 2026
destination
Austria and Mexico together take 41% of it.
customs district
origin
entry
rate provision · imports
81.1% enters free of duty; duty collected equals 2.88% of imports for consumption.