Product classification
HS code for Construction adhesive: 3506.91
Adhesives, prepared, based on polymers of heading 3901 to 3913 or on rubber.
Classification of construction adhesive under HS 3506.91
Construction adhesives are classified under HS code 3506.91 based on their chemical composition and their preparation for use as an adhesive. Heading 3506 encompasses a wide range of prepared glues and adhesives that are not specified more specifically in other headings. Subheading 3506.91 is particularly focused on products where the primary adhesive component is a polymer (falling under headings 39.01 to 39.13) or rubber. These are 'prepared' adhesives, meaning they are formulated with solvents, fillers, or other additives to make them suitable for bonding materials in construction environments. This includes heavy-duty bonding agents used for flooring, wall panels, and structural components. The classification is determined by the active bonding agent; for instance, if the adhesive is based on polyurethane, acrylic, or synthetic rubber, it fits here. It is important to distinguish these from simple resins or unmixed polymers, as the 'prepared' nature of the adhesive—ready for application—is a prerequisite for heading 3506. The product must be intended for use as an adhesive rather than a sealant or filler.
- Covers
- Polymer-based structural adhesives
- Rubber-based construction glues
- Polyurethane adhesives for subflooring
- Acrylic-based wall panel adhesives
- Liquid nails and similar heavy-duty bonding agents
- Also under 3506.91
- SikaBond
- 3M VHB Tapes (adhesive component)
- Henkel Loctite (industrial range)
- Bostik industrial adhesives
- Dow Corning silicone sealants
Codes often confused with 3506.91
Common mistake. This code is often confused with HS code 3214, which covers mastics and fillers like painters' fillings or resin cements. If the product is put up for retail sale in packages not exceeding 1 kg, it must be classified under HS code 3506.10 regardless of its chemical composition.
Top exporters and importers of HS 350691 (the code used for construction adhesive), 2025
In 2025, the largest exporter of HS 350691 (the code used for construction adhesive) in UN Comtrade data was China, with 19% of world exports; the largest importer in UN Comtrade data was China, with 17% of world imports. Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 8.6% of its imports here ($44M, CEPII BACI), so it may also belong among the top importers.
Figures cover everything classified under HS 350691, not only construction adhesive.
Top exporters 2025 · share of world exports
- 1 China $1.9B 19% of world exports
- 2 Germany $1.8B 19% of world exports
- 3 United States $1.2B 12% of world exports
World total: $9.7B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $1.7B 17% of world imports
- 2 Germany $697M 7.1% of world imports
- 3 United States $524M 5.4% of world imports
Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 8.6% of its imports here ($44M, CEPII BACI), so it may also belong among the top importers.
World total: $9.8B 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 codes for construction adhesive
Brazil splits HS 3506.91 into 3 NCM codes. Pick the one that matches your product:
- 3506.91.10Rubber-based adhesives
- 3506.91.20Water-dispersible polymer-based adhesives
- 3506.91.90Other polymer-based adhesives
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about construction adhesive
What is the HS code for Construction adhesive?
The HS code for Construction adhesive is 350691 (Adhesives; prepared, based on polymers of heading 3901 to 3913 or on rubber). The HS code for prepared construction adhesives based on polymers or rubber is 3506.91.
How do I classify Construction adhesive for customs?
Construction adhesive is classified under HS code 350691 — Adhesives; prepared, based on polymers of heading 3901 to 3913 or on rubber. This is a 6-digit subheading level code.
Does the packaging size affect the HS code?
Yes, if the adhesive is in a container weighing 1 kg or less and labeled for retail sale, it moves to HS code 3506.10.
Which countries are the top exporters of construction adhesive (HS 350691)?
In 2025, the top exporters of HS 350691 (the code used for construction adhesive) in UN Comtrade data were China ($1.9B, 19% of world exports), Germany ($1.8B) and the United States ($1.2B). World exports came to about $9.7B, 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 construction adhesive (HS 350691)?
In 2025, the top importers of HS 350691 (the code used for construction adhesive) in UN Comtrade data were China ($1.7B, 17% of world imports), Germany ($697M) and the United States ($524M). World imports came to about $9.8B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Vietnam did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 8.6% of its imports here ($44M, CEPII BACI), so it may also belong among the top importers.
Is the HS code for Construction adhesive the same in all countries?
The base HS code 350691 for Construction adhesive 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 construction adhesive in Brazil?
Brazil splits HS 350691 into 3 NCM codes, so the right one for construction adhesive depends on the product's details: 3506.91.10 (Rubber-based adhesives), 3506.91.20 (Water-dispersible polymer-based adhesives), 3506.91.90 (Other polymer-based adhesives).