HS 382440 Prepared additives for cements, mortars or concretes

Quick Answer: Prepared additives for cements, mortars, or concretes imported under HS 382440 enter the UK at 6.00%, the EU at 6.50%, and the US with a complex structure including a 6.5% ad valorem rate and a specific duty of 3.7¢/kg plus 60% for certain origins, alongside numerous duty-free provisions. This classification covers chemical admixtures and other substances designed to enhance the properties of construction materials like concrete, mortar, and cement, such as plasticizers, accelerators, and retarders. Importers should carefully review the specific subheadings and origin-based duty rates in each jurisdiction, as detailed on platforms like CustomTariffs, to ensure accurate declaration and compliance.

What Are the Import Duty Rates?

🇬🇧 United Kingdom

Code MFN Preferential Unit
3824400000 6.00 %

🇪🇺 European Union (TARIC)

Code MFN Preferential Unit
3824400000 6.50 %

🇺🇸 United States (HTSUS)

Code MFN Preferential Unit
3824401000 6.5% Free (17 programs) ["kg"]
3824402000 Free ["kg"]
3824405000 5% Free (17 programs) ["kg"]
382440

Special rates available under trade agreements including USMCA, KORUS, GSP.

Duty rates sourced from the USITC (US International Trade Commission) Harmonized Tariff Schedule (HTS) (accessed 2/22/2026), EU TARIC – DG TAXUD (Directorate-General for Taxation and Customs Union) (accessed 2/22/2026), and UK Trade Tariff – HMRC (His Majesty's Revenue and Customs) (accessed 2/22/2026).

Data compiled and presented by HSRates.

Which Trade Agreements Reduce Duties for HS 3824.40?

Imports of Prepared additives for cements, mortars or concretes may qualify for reduced or zero duty rates under free trade agreements and preferential programs. The overview below shows available preferential arrangements by jurisdiction, compiled by HSRates from official tariff and trade agreement data.

United States (HTSUS)

Free for USMCA, KORUS, and 15 other programs

European Union (TARIC)

Preferential rate data not yet available.

United Kingdom

Preferential rate data not yet available.

Preferential rates require proof of origin and may be subject to quotas or conditions. Always verify eligibility with a licensed customs broker.

Data compiled by HSRates.

Which Preferential Rates Apply to Your Origin Country?

Select an origin country to see if preferential rates apply.

Preferential rates based on available trade agreements. Actual rates may vary.

How to Classify This HS Code?

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What products does HS 382440 cover?

This subheading covers prepared additives specifically designed for use in cements, mortars, or concretes. According to the World Customs Organization's Harmonized System Nomenclature, these are typically chemical products or mixtures that enhance the properties of these construction materials, such as improving workability, accelerating or retarding setting times, increasing strength, or providing water repellency. Official definitions from sources like the USITC Harmonized Tariff Schedule (HTS) and the EU's TARIC database confirm that this category includes admixtures like plasticizers, accelerators, retarders, and air-entraining agents, provided they are presented in a form ready for direct incorporation into construction mixtures.

What falls outside HS 382440?

The following products are excluded from HS 382440: basic chemical compounds that are not specifically prepared as additives for cements, mortars, or concretes, and are classified under their respective chemical headings (e.g., Portland cement itself, classified under heading 2523). Also excluded are finished construction materials that already incorporate these additives, such as pre-mixed concrete or mortar. Products that are primarily binders or fillers, rather than performance-enhancing additives, may also fall under different headings. For instance, basic aggregates like sand or gravel are classified in Chapter 25.

What are common classification mistakes for HS 382440?

A common error is misclassifying products that are components of these additives but are not the finished prepared additive itself. For example, a single chemical ingredient that is intended to be mixed with other substances to create a concrete additive might be classified under its specific chemical heading rather than 382440. This often arises from not adhering to General Interpretative Rule 3(b) of the Harmonized System, which addresses mixtures and composite goods. Importers must ensure the product is presented as a prepared additive ready for use, not merely a raw ingredient.

How should importers classify products under HS 382440?

The correct procedure for classifying products under HS 382440 involves a thorough review of the product's composition, intended use, and presentation. Importers and customs brokers should consult the product's Safety Data Sheet (SDS) and technical documentation to confirm it is a prepared additive for cements, mortars, or concretes. Cross-referencing with the official tariff schedules of the importing country, such as the USITC HTS or the EU TARIC, is crucial. If uncertainty remains, seeking a binding ruling from customs authorities is the most reliable approach to ensure accurate classification and avoid penalties.

How is the duty calculated for products under HS 382440?

A shipment of 10,000 kilograms of a concrete superplasticizer, declared at a customs value of $15,000 USD, would attract a US duty of $750.00. This is calculated using the Most Favored Nation (MFN) duty rate of 5.0% ad valorem, applied to the declared customs value ($15,000 USD × 5.0% = $750.00). This calculation is based on the MFN rate published in the USITC Harmonized Tariff Schedule for HS code 382440. The specific rate can vary significantly by country and trade agreement.

Which trade agreements reduce duties for HS 382440?

Several free trade agreements may reduce the applicable duty rate for HS 382440, including the United States-Mexico-Canada Agreement (USMCA). Under USMCA, products originating in Canada or Mexico may benefit from a duty rate of Free. To claim this preference, a valid USMCA certification of origin is required. Additionally, certain developing countries may benefit from preferential rates under the Generalized System of Preferences (GSP), often requiring a GSP Form A. The specific preferential rate and documentation requirements depend on the origin country and the importing jurisdiction's trade policies.

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FAQ

What are the typical import duty rates for HS code 382440, 'Prepared additives for cements, mortars or concretes'?

The import duty rates for HS code 382440 can vary significantly depending on the importing country and any applicable trade agreements. For example, under the U.S. Harmonized Tariff Schedule (HTS), the Most Favored Nation (MFN) rate is often 6.5% ad valorem. However, preferential rates under trade agreements can be lower or even free. For instance, rates can range from Free (under agreements with countries like Australia (AU), Canada (CA), Mexico (MX), South Korea (KR), etc.) to specific rates like 3.7¢/kg + 60% ad valorem, or a flat 6.00% or 6.50% ad valorem. It is crucial to consult the specific tariff schedule of the destination country for the exact rate applicable to your shipment. The USITC HTS is a primary source for U.S. import duties.

How is the duty calculated for HS 382440 when a specific rate (e.g., 3.7¢/kg + 60%) applies?

When a compound duty rate applies, such as 3.7¢/kg + 60% ad valorem for HS 382440, the total duty is the sum of the specific duty (based on weight) and the ad valorem duty (based on value). For example, if you import 1,000 kilograms of a product valued at $5,000 USD, and the duty rate is 3.7¢/kg + 60% ad valorem:

  1. Specific Duty: 1,000 kg * $0.037/kg = $37.00 USD
  2. Ad Valorem Duty: $5,000 USD * 60% = $3,000.00 USD
  3. Total Duty: $37.00 USD + $3,000.00 USD = $3,037.00 USD

This calculation demonstrates how both weight and value contribute to the final duty amount. Always verify the exact rate and currency for the specific calculation.

What are the key criteria for classifying a product under HS code 382440, 'Prepared additives for cements, mortars or concretes'?

To be classified under HS code 382440, a product must be a 'prepared additive' specifically designed for use in cements, mortars, or concretes. This typically includes substances that modify the properties of these building materials, such as plasticizers, accelerators, retarders, air-entraining agents, or waterproofing agents. The key is that the product is presented in a prepared form, ready for incorporation into the cementitious mix, and not simply a raw chemical that requires further processing. The World Customs Organization (WCO) Harmonized System Explanatory Notes provide guidance on the scope of this heading, emphasizing the 'prepared' nature and intended end-use.

Which common trade agreements offer preferential duty rates for HS code 382440 into the United States?

Several trade agreements can provide preferential duty rates for products classified under HS code 382440 when imported into the United States. These include agreements with countries such as Australia (AU), Bahrain (BH), Canada (CA), Chile (CL), Colombia (CO), Dominican Republic (D), Israel (IL), Jordan (JO), South Korea (KR), Mexico (MX), Morocco (MA), Oman (OM), Panama (PA), Peru (PE), Singapore (SG), and others. Under these agreements, the duty rate for HS 382440 can be Free (0% ad valorem). Importers must ensure they have a valid Certificate of Origin and meet all other requirements of the specific trade agreement to claim preferential treatment. The USITC HTS provides details on these preferential rates.

What documentation is typically required for importing products under HS code 382440?

When importing products classified under HS code 382440, standard import documentation is generally required, including a commercial invoice, packing list, and bill of lading or air waybill. Depending on the importing country and the specific nature of the additive, additional documentation might be necessary. This could include a Safety Data Sheet (SDS) for chemical products, a Certificate of Origin to claim preferential duty rates under trade agreements, and potentially a manufacturer's declaration or technical data sheet confirming the product's composition and intended use as an additive for cements, mortars, or concretes. Customs brokers should verify the specific requirements with the destination country's customs authority.