Product classification
HS code for Adhesive mastic: 3214.90
Mastics, n.e.c. in heading no. 3214.
Classification of adhesive mastic under HS 3214.90
Adhesive mastic is classified under HS code 3214.90, which covers mastics and other painters' fillings. This classification is part of Chapter 32, which includes tanning or dyeing extracts, tannins and their derivatives, dyes, pigments, and other coloring matter, as well as putties and mastics. Heading 3214 is specifically for glazier's putty, grafting putty, resin cements, caulking compounds, and other mastics. Subheading 3214.90 is used for mastics that do not fall under the more specific 3214.10 (glazier's putty). These products are typically used for sealing, filling, or bonding surfaces in construction and industrial applications. They are distinguished from prepared glues of heading 3506 by their thicker consistency and their primary use as fillers or sealants rather than just surface-to-surface adhesives. The classification is determined by the chemical composition and the intended application as a filler or non-refractory surfacing preparation.
- Covers
- Tile adhesives (mastic type)
- Wall mastics for construction
- Joint fillers and sealants
- Resin cements for bonding
- Non-refractory surfacing preparations
- Also under 3214.90
- SikaFlex-221
- GE Silicone II
- Loctite PL Premium
- Tremco Tremflex 834
- DAP Dynaflex 230
Codes often confused with 3214.90
Common mistake. Adhesive mastics are often confused with prepared glues and other prepared adhesives classified under HS code 3506.91. The distinction lies in the application: 3506 is for adhesives intended for retail sale or specific bonding, while 3214 is for mastics used as fillers or for surfacing. Another misclassification occurs with refractory cements under 3816.00, which are designed to withstand high temperatures, unlike the mastics in 3214.90. Glazier's putty is also frequently misclassified here, but it has its own subheading at 3214.10.
Top exporters and importers of HS 321490 (the code used for adhesive mastic), 2025
In 2025, the largest exporter of HS 321490 (the code used for adhesive mastic) in UN Comtrade data was Germany, with 22% of world exports; the largest importer in UN Comtrade data was Germany, with 4.2% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 321490, not only adhesive mastic.
Top exporters 2025 · share of world exports
- 1 Germany $600M 22% of world exports
- 2 Austria $193M 6.9% of world exports
- 3 United States $190M 6.9% of world exports
World total: $2.8B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $121M 4.2% of world imports
- 2 Netherlands $120M 4.2% of world imports
- 3 France $104M 3.6% of world imports
World total: $2.8B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for adhesive mastic
Brazil classifies adhesive mastic under NCM 3214.90.00: HS 3214.90 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about adhesive mastic
What is the HS code for Adhesive mastic?
The HS code for Adhesive mastic is 321490 (Mastics; n.e.c. in heading no. 3214). The HS code for adhesive mastic is 3214.90, categorized under mastics and painters' fillings.
How do I classify Adhesive mastic for customs?
Adhesive mastic is classified under HS code 321490 — Mastics; n.e.c. in heading no. 3214. This is a 6-digit subheading level code.
How does 3214.90 differ from 3506.91?
3214.90 is for mastics and fillers used in construction and surfacing, whereas 3506.91 is for prepared adhesives based on polymers or rubber intended for bonding surfaces.
Which countries are the top exporters of adhesive mastic (HS 321490)?
In 2025, the top exporters of HS 321490 (the code used for adhesive mastic) in UN Comtrade data were Germany ($600M, 22% of world exports), Austria ($193M) and the United States ($190M). World exports came to about $2.8B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of adhesive mastic (HS 321490)?
In 2025, the top importers of HS 321490 (the code used for adhesive mastic) in UN Comtrade data were Germany ($121M, 4.2% of world imports), the Netherlands ($120M) and France ($104M). World imports came to about $2.8B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Adhesive mastic the same in all countries?
The base HS code 321490 for Adhesive mastic is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for adhesive mastic in Brazil?
In Brazil, adhesive mastic (HS 321490) is classified under NCM 3214.90.00.