Product classification
HS code for Brazing paste: 3810.10
Pickling preparations for metal surfaces, soldering, brazing or welding powders and pastes consisting of metal and other materials.
Classification of brazing paste under HS 3810.10
Brazing paste is classified under HS code 3810.10. This code is designated for pickling preparations for metal surfaces and soldering, brazing, or welding powders and pastes consisting of metal and other materials. The classification is driven by the product's identity as a chemical preparation rather than a raw metal. Brazing pastes are complex mixtures containing atomized filler metal powder, a fluxing agent to remove oxides, and a binder or carrier to maintain a paste-like consistency. According to the Explanatory Notes for Chapter 38, heading 3810 includes preparations used to facilitate the joining of metals by ensuring the surfaces are chemically clean and by providing the necessary filler material in a convenient form. Even if the paste contains a high percentage of silver or other metals, it remains in 3810.10 because the addition of fluxes and binders gives it the character of a \"preparation\" rather than a simple metal alloy or powder found in Chapters 71 or 80. These pastes are widely used in automated industrial processes where precise amounts of filler and flux must be applied to joints before heating in a furnace or via induction.
- Covers
- Silver brazing paste
- Copper-phosphorus brazing paste
- Nickel-based brazing pastes
- Aluminum brazing flux-cored pastes
- Soldering pastes for electronics
- Welding powders with flux
- 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. A common misclassification occurs with HS code 7106.92 or 7108.13 when the paste contains precious metals like silver or gold. However, Note 1 to Chapter 71 and the notes to Chapter 38 clarify that prepared pastes containing flux are classified in 3810. Another error is using 3214.10, which is for painters' fillings or glaziers' putty; while both are \"pastes,\" their chemical composition and industrial application are entirely different.
Top exporters and importers of HS 381010 (the code used for brazing paste), 2025
In 2025, the largest exporter of HS 381010 (the code used for brazing 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 brazing paste.
Top exporters 2025 · share of world exports
- 1 United States $222M 15% of world exports
- 2 Japan $215M 14% of world exports
- 3 China $171M 11% of world exports
World total: $1.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Philippines $209M 12% of world imports
- 2 China $173M 10% of world imports
- 3 Vietnam* ~$162M 9.5% of world imports · partner records ↗
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 brazing paste
Brazil splits HS 3810.10 into 2 NCM codes. Pick the one that matches your product:
- 3810.10.10Metal pickling preparations
- 3810.10.20Soldering and welding pastes and powders
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about brazing paste
What is the HS code for Brazing paste?
The HS code for Brazing paste is 381010 (Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials). The correct HS code for brazing paste containing metal and flux is 3810.10.
How do I classify Brazing paste for customs?
Brazing 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 liquid flux?
No, liquid flux without metal powder is typically classified under HS code 3810.90, as it is a preparation but not a metal-containing paste.
Which countries are the top exporters of brazing paste (HS 381010)?
In 2025, the top exporters of HS 381010 (the code used for brazing 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 brazing paste (HS 381010)?
In 2025, the top importers of HS 381010 (the code used for brazing 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 Brazing paste the same in all countries?
The base HS code 381010 for Brazing 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 brazing paste in Brazil?
Brazil splits HS 381010 into 2 NCM codes, so the right one for brazing paste depends on the product's details: 3810.10.10 (Metal pickling preparations), 3810.10.20 (Soldering and welding pastes and powders).