Product classification

HS code for Soldering paste: 3810.10

Pickling preparations for metal surfaces, soldering, brazing or welding powders and pastes consisting of metal and other materials.

Classification of soldering paste under HS 3810.10

Soldering paste is classified under HS code 3810.10 because it is defined as a chemical preparation rather than a simple metal alloy. According to the Harmonized System, Chapter 38 encompasses various miscellaneous chemical products, and heading 3810 specifically addresses pickling preparations for metal surfaces, as well as fluxes and other auxiliary preparations for soldering, brazing, or welding. The subheading 3810.10 is designated for powders and pastes consisting of metal and other materials. This classification is determined by the functional nature of the product; since the paste contains fluxing agents, binders, and other chemical components alongside the metallic solder powder, it is viewed as a composite chemical preparation. The presence of these non-metallic elements is crucial, as it facilitates the soldering process by preventing oxidation and improving the flow of the molten metal. Consequently, even though the primary active ingredient is metal, the product's formulation as a ready-to-use paste for industrial or electronic applications necessitates its placement within the chemical chapter of the tariff schedule rather than the base metal chapters.

Covers
  • Lead-free solder paste for SMT assembly
  • Silver-bearing soldering paste
  • Tin-lead solder paste with integrated flux
  • Brazing pastes containing metal powders and chemical binders
  • Reflow soldering pastes for electronic circuit boards
Also under 3810.10
  • Kester Solder Paste
  • Indium Corporation Solder Paste
  • Alpha Assembly Solutions
  • Henkel Loctite
  • Chemetall Ardrox

Codes often confused with 3810.10

Common mistake. Soldering paste is frequently misclassified under HS code 8003.00, which covers tin bars, rods, profiles, and wire. While many soldering pastes are tin-based, 8003.00 is reserved for simple metal shapes without chemical additives. Another common error is using 3810.90, which is the residual category for other fluxes and auxiliary preparations. However, 3810.10 is the more specific code when the preparation is specifically in the form of a powder or paste consisting of metal and other materials.

8003.00Tin; bars, rods, profiles and wire3810.90Fluxes and other auxiliary preparations; for soldering, brazing or welding, or preparations used as cores or coatings for welding electrodes or rods

Top exporters and importers of HS 381010 (the code used for soldering paste), 2025

In 2025, the largest exporter of HS 381010 (the code used for soldering paste) in UN Comtrade data was the United States, with 15% of world exports; the largest importer in UN Comtrade data was the Philippines, with 12% 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 381010, not only soldering paste.

Top exporters 2025 · share of world exports

  1. 1 United States $222M
  2. 2 Japan $215M
  3. 3 China $171M

World total: $1.5B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Philippines $209M
  2. 2 China $173M
  3. 3 Vietnam* ~$162M

World total: $1.7B 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 soldering paste

Brazil splits HS 3810.10 into 2 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about soldering paste

What is the HS code for Soldering paste?

The HS code for Soldering paste is 381010 (Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials). The HS code for soldering paste consisting of metal and other materials (like flux) is 3810.10.

How do I classify Soldering paste for customs?

Soldering paste is classified under HS code 381010 — Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials. This is a 6-digit subheading level code.

Does this code include pure tin powder?

No, pure tin powder without flux or other chemical binders is typically classified under 8005.00, as it lacks the 'preparation' aspect required for Chapter 38.

Which countries are the top exporters of soldering paste (HS 381010)?

In 2025, the top exporters of HS 381010 (the code used for soldering paste) in UN Comtrade data were the United States ($222M, 15% of world exports), Japan ($215M) and China ($171M). World exports came to about $1.5B, 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 soldering paste (HS 381010)?

In 2025, the top importers of HS 381010 (the code used for soldering paste) in UN Comtrade data were the Philippines ($209M, 12% of world imports), China ($173M) and Vietnam (about $162M). World imports came to about $1.7B, 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.

Is the HS code for Soldering paste the same in all countries?

The base HS code 381010 for Soldering paste 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 soldering paste in Brazil?

Brazil splits HS 381010 into 2 NCM codes, so the right one for soldering paste depends on the product's details: 3810.10.10 (Metal pickling preparations), 3810.10.20 (Soldering and welding pastes and powders).