Refractory Cement (Silicate)
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 6815994110 | 35.0% | CN | US | Official Doc |
| 6815910011 | 35.0% | CN | US | Official Doc |
| 3824999361 | 40.0% | CN | US | Official Doc |
| 3824993990 | 35.0% | CN | US | Official Doc |
| 3816002010 | 38.0% | CN | US | Official Doc |
AI Analysis
ποΈ Refractory Cement (Silicate/Phosphate)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π 1. Product Definition & Classification: Do You Really Understand "Refractory Cement"?
Refractory cement is a high-performance binding material used in kilns, furnances, and industrial heat-resistant structures. While commonly referred to as "Silicate" or "Phosphate" cement in trade, its classification depends heavily on its chemical composition and functional characteristics.
In international trade, it is generally divided into two main categories based on its primary binding agent and chemical nature:
- Mineral/Inorganic Binders: Primarily based on alumina-silicate or phosphate compounds, classified under Chapter 68 (Articles of stone or of other mineral substances).
- Chemical Preparations: Mixtures where the phosphate compound is the core active ingredient, classified under Chapter 38 (Chemical products and preparations).
β οΈ Key Distinction Point:
- If the product is viewed as a mineral construction material (like a special concrete) β It falls under Chapter 68.
- If the product is viewed as a chemical mixture/preparation (specifically containing phosphate compounds) β It falls under Chapter 38.
- Note: The term "Silicate" in common usage often overlaps with "Phosphate" in technical formulations, leading to different HS codes with significant tax implications.
π¦ 2. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Chemical/Functional Basis |
|---|---|---|---|
6815.99.41.10 |
Refractory Phosphate Cement (Mineral) | Mineral/inorganic product; made of stone or other mineral materials. | Mineral Properties: Treated as a stone/mineral article. |
6815.91.00.11 |
Phosphate Refractory Cement (Mineral) | Mineral material product; chemical composition matches mineral product attributes. | Mineral Properties: Chemical composition aligns with mineral goods. |
3824.99.93.61 |
Phosphate Refractory Cement (Chemical) | Core component is phosphate; conforms to chemical characteristics of phosphorus-containing substances. | Chemical Properties: Defined by its phosphorus-atom chemical nature. |
3824.99.39.90 |
Refractory Phosphate Cement (Chemical) | Chemical industry preparation; composition conforms to inorganic compound mixture characteristics. | Chemical Mixture: Viewed as a prepared chemical mixture. |
3816.00.20.10 |
Refractory Cement (Corrosion Resistant) | Corrosion-resistant material; functional characteristics consistent with refractory articles. | Functional Property: Highlighted for corrosion resistance and refractory function. |
π Critical Reminder:
- Chapter 68 (6815...): Treats the cement as a mineral/construction material. Generally has a lower base tariff (0%).
- Chapter 38 (3824...,3816...): Treats the cement as a chemical preparation. Generally has a higher base tariff (3%-5%).
- Misclassification can lead to significant duty differences and customs delays.
π° 3. 2026 Latest Tariff Rate Details (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Country of Origin: China (CN)
β Effective Date: From November 10, 2025 (including subsequent imports)
π― 1. 6815.99.41.10 & 6815.91.00.11 ββ Mineral-Based Refractory Cement
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge | +10.0% (Targeting China/HK products) |
| Total Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Applicable (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:6815.99.41.10 / 6815.91.00.11 |
π Explanation:
- "USITC Surcharge 25%": Additional tariff under US Trade Law Section 301.
- "IEEPA 10%": Tariff under the International Emergency Economic Powers Act (IEEPA).
- Total 35%: A moderate-high duty rate. Correctly classifying as "Mineral" avoids the higher base rate of Chapter 38.
π― 2. 3824.99.93.61 ββ Phosphate Refractory Cement (Chemical/Phosphorus-Containing)
| Item | Content |
|---|---|
| Base Tariff | 5.0% (ad valorem) |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge | +10.0% (Targeting China/HK products) |
| Total Rate | 40.0% |
| Tax Calculation | CIF Value Γ 40% |
| De Minimis Exemption | β Not Applicable (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3824.99.93.61 |
π Explanation:
- Higher than Chapter 68 due to the 5% Base Tariff.
- This code emphasizes the chemical nature (phosphorus atoms) rather than the mineral/construction aspect.
π― 3. 3824.99.39.90 ββ Refractory Phosphate Cement (Chemical Mixture)
| Item | Content |
|---|---|
| Base Tariff | 0.0% (ad valorem) |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge | +10.0% (Targeting China/HK products) |
| Total Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35% |
| De Minimis Exemption | β Not Applicable (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3824.99.39.90 |
π Explanation:
- Although the base is 0%, it is still subject to the same 35% total rate.
- Classified as a general chemical preparation mixture.
π― 4. 3816.00.20.10 ββ Refractory Cement (Corrosion Resistant)
| Item | Content |
|---|---|
| Base Tariff | 3.0% (ad valorem) |
| USITC Surcharge (Section 301) | +25.0% |
| IEEPA Surcharge | +10.0% (Targeting China/HK products) |
| Total Rate | 38.0% |
| Tax Calculation | CIF Value Γ 38% |
| De Minimis Exemption | β Not Applicable (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3816.00.20.10 |
π Explanation:
- This code is often used when the product's corrosion resistance is the key functional feature.
- The total rate (38%) sits between the mineral and other chemical categories.
π οΈ 4. Customs Clearance Practical Advice (Real-World Pitfall Guide)
β 1. Required Documentation Checklist (No Exceptions)
| Document | Mandatory | Explanation |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must detail chemical composition, binding agent (phosphate/silicate), and heat resistance temperature. |
| β Safety Data Sheet (SDS) | βοΈ | Crucial for customs to verify chemical nature and hazardous goods status. |
| β Product Photos (with Label) | βοΈ | Clear view of packaging, brand, model, and "Refractory Cement" labeling. |
| β Commercial Invoice | βοΈ | Must accurately describe the product as "Refractory Cement" or "Phosphate Cement," not just "Cement." |
| β Certificate of Origin (CO) | βοΈ | Required for origin verification and tariff application. |
| β Packing List | βοΈ | Detail weight and quantity to match invoice. |
β 2. Declaration Techniques (Key Mantra)
π₯ "Clarify Nature, Don't Just Say 'Cement'! Chemical vs. Mineral Determines the Tax!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Mineral-based (Stone/Inorganic) | 6815.99.41.10 or 6815.91.00.11 |
Misdeclaring as general cement β Potential duty dispute. |
| Phosphate Chemical Mixture | 3824.99.93.61 |
Misdeclaring as mineral β Underpayment of duties (if base rate differs). |
| Corrosion-Resistant Function | 3816.00.20.10 |
Ignoring functional claims β Missed opportunity for correct classification. |
| Generic "Refractory Cement" | Specify Composition | Vague description β Customs delay, possible reclassification to highest duty. |
β 3. Special Handling Cases
| Scenario | Handling Advice |
|---|---|
| OEM Custom Refractory Cement | Provide client orders + technical data sheets to prove specific chemical formulation. |
| Mixed Packaging (Cement + Accessories) | Declare the main product (Cement). Do not split accessories unless they are distinct high-value items. |
| High Heat Resistance (>1000Β°C) | Emphasize "Refractory" and "Heat Resistant" in description to support Chapter 68 or 38 classification based on function. |
| Liquid vs. Powder Form | Ensure SDS reflects physical state. Liquid phosphate cements may face different handling requirements. |
π 5. Global Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 6815.99.41.10 / 3824.99.93.61 |
35% - 40% | SDS, Chemical Inventory | High tariffs due to Section 301 + IEEPA. |
| π¨π³ China | 6815.99.41.10 / 3824.99.93.61 |
Varies (5-10%) | None usually | No surtaxes for domestic trade. |
| πͺπΊ EU | 6815.99.80 / 3824.99.98 |
0-6.5% | REACH Registration | REACH compliance is critical for chemicals. |
| π¦πΊ Australia | 6815.99.00 / 3824.99.90 |
5% | AICIS Registration | Industrial Chemicals Act compliance. |
| π―π΅ Japan | 6815.99.00 / 3824.99.90 |
0-5% | PRTR Law | Pollution Release and Transfer Register. |
π Conclusion:
- USA is the most costly market for refractory cement due to cumulative surtaxes (Total 35-40%).
- EU and others require strict chemical compliance (REACH, AICIS), which can be a barrier to entry even if tariffs are lower.
- China Origin faces the highest landed cost in the US. Consider supply chain diversification if targeting the US market.
π 6. Common Errors & Pitfall Guide (Lessons Learned)
β Error 1: Declaring "Refractory Cement" simply as "Cement" (HS 2523)
π Consequence: Incorrect classification. Cement for building is different from refractory cement. Result: Customs detention and penalty.
β Error 2: Misclassifying Chemical Phosphate Cement as Mineral (Chapter 68) to avoid higher base rates
π Consequence: Customs audit may reclassify to Chapter 38, leading to back taxes and fines.
Note: In this specific dataset, the total tax is similar (35%), but the legal risk remains.
β Error 3: Ignoring the SDS (Safety Data Sheet)
π Consequence: Customs cannot verify chemical nature β Delay in clearance.
β Error 4: Using vague terms like "Binding Agent"
π Consequence: Ambiguity β Higher scrutiny and potential reclassification.
β Correct Declaration Example:
"Refractory Phosphate Cement, Chemical Preparation, Phosphate-based binder, High Temperature Resistant (>1200Β°C), Powder, For Industrial Kiln Lining, Model XYZ, SDS Provided"
π― 7. Conclusion: Professional Declaration Saves Money!
π― Remember the Mantra:
πΉ "Mineral vs. Chemical: Check the Composition!"
πΉ "35% is the Floor in the US; Don't Risk 40% + Penalties!"
πΉ "SDS is Your Best Friend for Chemical Customs!"
π Pro Tip:
If your refractory cement is originating from Vietnam, Mexico, or Thailand, you may be eligible for IEEPA Exemptions, reducing the total tariff significantly.
Recommendation: Apply for an Advance Ruling from US Customs and Border Protection (CBP) before shipping to avoid surprises.
π£ Take Action Now:
π Contact a Professional Customs Broker + Provide Product Specs + Apply for HS Code Advance Ruling
π Ensure your refractory cement passes customs smoothly, efficiently, and profitably!
β¨ Professional Clearance Starts with Precise Classification!
πΌ Every Cent of Duty is Worth Calculating!
Customer Reviews
About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.