Product classification
HS code for Dolomite ramming mix: 3816.00
Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01.
Classification of dolomite ramming mix under HS 3816.00
Dolomite ramming mix is classified under HS code 3816.00. This heading covers refractory cements, mortars, concretes, and similar compositions, including dolomite ramming mix, other than products of heading 38.01 (graphite). Ramming mixes are unshaped refractory materials consisting of graded aggregates and binders that are compacted in situ using a pneumatic rammer or manual tool. They are essential for forming the monolithic linings of industrial furnaces, particularly in the steel industry. The classification is based on the product being a prepared chemical or mineral mixture intended for a specific industrial application (refractory lining). Because it is a mixture of minerals and binders rather than a single raw mineral, it is excluded from Chapter 25 and placed in Chapter 38.
- Covers
- Dry dolomite ramming mixes
- Wet-mixed refractory dolomite compositions
- Dolomite-based patching and repair masses
- Basic ramming mixes for electric arc furnaces
- Gunning mixes containing dolomite
- Also under 3816.00
- Saint-Gobain Refractories
- RHI Magnesita
- Vesuvius
- Krosaki Harima
- Calderys
Codes often confused with 3816.00
Common mistake. Dolomite ramming mix is often confused with HS code 2518.20, which covers calcined or sintered dolomite. While calcined dolomite is a primary ingredient, the addition of binders or other minerals to create a "mix" moves the product to 3816.00. It may also be confused with HS code 3214.90 (non-refractory surfacing preparations), but the high-temperature resistance and refractory nature of the dolomite mix mandate classification in 3816.00.
Top exporters and importers of HS 381600 (the code used for dolomite ramming mix), 2025
In 2025, the largest exporter of HS 381600 (the code used for dolomite ramming mix) in UN Comtrade data was China, with 20% of world exports; the largest importer in UN Comtrade data was Indonesia, with 7.7% 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 381600, not only dolomite ramming mix.
Top exporters 2025 · share of world exports
- 1 China $515M 20% of world exports
- 2 Germany $311M 12% of world exports
- 3 United States $228M 8.8% of world exports
World total: $2.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Indonesia $225M 7.7% of world imports
- 2 United States $148M 5.1% of world imports
- 3 India $143M 4.9% of world imports
World total: $2.9B 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 dolomite ramming mix
Brazil splits HS 3816.00 into 6 NCM codes. Pick the one that matches your product:
- 3816.00.11Magnesite-based refractory cements and mortars
- 3816.00.12Sillimanite refractory cements and mortars
- 3816.00.19Other refractory cements and mortars
- 3816.00.21Graphite refractory mixes, 50 % or more corundum
- 3816.00.29Other chrome-magnesite, corundum etc. refractories
- 3816.00.90Other refractory concretes and compositions
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dolomite ramming mix
What is the HS code for Dolomite ramming mix?
The HS code for Dolomite ramming mix is 381600 (Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01). The HS code for dolomite ramming mix is 3816.00.
How do I classify Dolomite ramming mix for customs?
Dolomite ramming mix is classified under HS code 381600 — Refractory cements, mortars, concretes and similar compositions, including dolomite ramming mix, other than products of heading 38.01. This is a 6-digit subheading level code.
Is this the same as refractory mortar?
While they are in the same HS heading (3816.00), ramming mixes have a different consistency and application method compared to mortars; however, for customs purposes, they share the same code.
Which countries are the top exporters of dolomite ramming mix (HS 381600)?
In 2025, the top exporters of HS 381600 (the code used for dolomite ramming mix) in UN Comtrade data were China ($515M, 20% of world exports), Germany ($311M) and the United States ($228M). World exports came to about $2.6B, 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 dolomite ramming mix (HS 381600)?
In 2025, the top importers of HS 381600 (the code used for dolomite ramming mix) in UN Comtrade data were Indonesia ($225M, 7.7% of world imports), the United States ($148M) and India ($143M). World imports came to about $2.9B, 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 Dolomite ramming mix the same in all countries?
The base HS code 381600 for Dolomite ramming mix 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 dolomite ramming mix in Brazil?
Brazil splits HS 381600 into 6 NCM codes, so the right one for dolomite ramming mix depends on the product's details: 3816.00.11 (Magnesite-based refractory cements and mortars), 3816.00.12 (Sillimanite refractory cements and mortars), 3816.00.19 (Other refractory cements and mortars), 3816.00.21 (Graphite refractory mixes, 50 % or more corundum), 3816.00.29 (Other chrome-magnesite, corundum etc. refractories), 3816.00.90 (Other refractory concretes and compositions).