High Strength Mortar for Refractory Bricks
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3816002010 | 38.0% | CN | US | Official Doc |
| 2522200000 | 35.0% | CN | US | Official Doc |
| 6902905020 | 35.0% | CN | US | Official Doc |
| 6902205020 | 35.0% | CN | US | Official Doc |
| 3816002050 | 38.0% | CN | US | Official Doc |
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AI Analysis
𧱠High Strength Mortar for Refractory Bricks (Refractory Cement/Mortar)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Specialized Clearance Strategy
π I. Product Definition & Classification: What Exactly Is This?
High Strength Mortar for Refractory Bricks is a specialized building material used primarily in industrial kilns, furnaces, and high-temperature environments. It serves as the binding agent for assembling refractory bricks (firebricks).
In international trade, this product is often ambiguous because it straddles the line between "Chemical Products" (if viewed as a cementitious mixture) and "Ceramic Materials" (if viewed as a component of refractory structures).
β οΈ Key Distinction Point: - If the product is primarily defined by its chemical composition (e.g., lime-based, calcium aluminate) and used as a general binding agent β It may fall under Chapter 38 (Miscellaneous Chemical Products) or Chapter 25 (Salt; Sulphur; Earths and Stone). - If the product is explicitly defined as a refractory ceramic accessory matching the bricks it binds β It may fall under Chapter 69 (Ceramic Products).
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
Based on the specific product nature ("Refractory," "Mortar," "High Strength"), here are the five most probable HS Codes with matching rationale from the provided data.
| HS Code | Product Description | Matching Rationale (Based on Provided Data) | Material/Category Logic |
|---|---|---|---|
| 3816.00.20.10 | Refractory Mortar & Cement | "Mortar" matches the material/category requirement perfectly. The name "Mortar" fully complies with the classification explanation for "Mortar" material/category. |
Primary: Mortar/Chemical binder |
| 2522.20.00.00 | Burnt Lime & Hydraulic Lime | Contains Lime Components. Refractory brick mortar is a building material with lime components. Its material characteristics (containing calcium oxide/hydroxide) align with the chemical attributes of burnt lime (2522.20) with no obvious material conflict. |
Primary: Lime-based binder |
| 6902.90.50.20 | Other Refractory Ceramic Materials | "Refractory" matches material; "Mortar" is aι
ε₯ (supporting) product. While not a brick itself, "Brick Mortar" is a supporting building material similar to refractory bricks/tiles. It fits a reasonable inference based on common sense, with no material conflict with "Other" categories. |
Primary: Ceramic Accessory |
| 6902.20.50.20 | Refractory Ceramic Building Materials | Falls under Refractory Materials Scope. Composition (Alumina/Silica) matches 6902.20.50.20. Mortar is treated as a consistent classification with refractory bricks in form and material logic, with no conflict. |
Primary: Refractory Ceramic Consistent |
| 3816.00.20.50 | Refractory Cement, Mortar & Similar Putties (Other) | "Mortar" is refractory cement/mortar. Although material is not explicitly stated, common sense infers it is "Other" type (non-clay). Fits the "Other" category definition for refractory mortars not elsewhere specified. |
Primary: Other Refractory Mortar |
π Critical Analysis: - 3816 vs 6902: The biggest debate is between Chapter 38 (Chemical/Cement) and Chapter 69 (Ceramics). - If itβs Lime-based (2522): The presence of Calcium Oxide/Hydroxide pushes it to Chapter 25. - Risk: Misclassification can lead to different tax burdens and regulatory requirements (e.g., FDA/USDA vs. no specific chemical regulation).
π° III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US) β Origin: China (CN) β Effective Time: Post-November 2025 (Includes subsequent imports)
π― 1. 3816.00.20.10 & 3816.00.20.50 ββ Refractory Mortar (Chemical Chapter)
| Item | Content |
|---|---|
| Base Tariff | 3.0% (Ad valorem) |
| Section 301 Surtax | +25.0% (From USITC Footnote regarding Chinese goods) |
| IEEPA Surtax | +10.0% (122 Section Tariff for Chinese/HSK products, effective Nov 2025) |
| Total Tariff Rate | 38.0% |
| Tax Calculation | CIF Value Γ 38.0% |
| De Minimis Eligibility | β No (Denied de minimis due to high surtaxes) |
| Legal Basis Path | IEEPA:9903.01.25 β USITC:3816.00.20.10 β FOOTNOTE:301 |
π Explanation: - These codes fall under Chapter 38, which attracts the full base tariff plus both surtaxes. - Total 38% is a significant cost driver. Ensure your supply chain margin can absorb this.
π― 2. 2522.20.00.00 ββ Burnt Lime / Hydraulic Lime
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35.0% |
| De Minimis Eligibility | β No |
| Legal Basis Path | IEEPA:9903.01.24 β USITC:2522.20.00.00 β FOOTNOTE:301 |
π Explanation: - Lower base rate (0%) makes this 3% cheaper than Chapter 38 options. - Crucial: You must prove the product is "Lime-based" via technical data sheets. If customs suspects it's a complex chemical mix, they may reclassify to 3816.
π― 3. 6902.90.50.20 & 6902.20.50.20 ββ Refractory Ceramic Materials
| Item | Content |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Surtax | +25.0% |
| IEEPA Surtax | +10.0% |
| Total Tariff Rate | 35.0% |
| Tax Calculation | CIF Value Γ 35.0% |
| De Minimis Eligibility | β No |
| Legal Basis Path | IEEPA:9903.01.24 β USITC:6902.20/90 β FOOTNOTE:301 |
π Explanation: - Also 35% total. - Requires strong argument that the mortar is a "Ceramic Product" accessory, not just a chemical binder. - Risk: Customs may argue that "mortar" is not a finished ceramic good but a raw material, pushing it back to 3816 or 2522.
π οΈ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
β 1. Essential Documentation Checklist (Non-Negotiable)
| Document | Required? | Purpose |
|---|---|---|
| β Technical Data Sheet (TDS) | βοΈ Critical | Must list chemical composition (e.g., % CaO, % Al2O3) to justify 2522 or 6902. |
| β Product Specification | βοΈ | Confirm "Refractory" grade (e.g., operating temp > 1000Β°C). |
| β Commercial Invoice | βοΈ | Clearly state: "High Strength Mortar for Refractory Bricks, Chemical/Ceramic Nature" |
| β Manufacturerβs Certificate | βοΈ | Confirm origin and production process (Kiln-fired? Chemical mix?). |
| β HS Code Pre-Ruling Request | βοΈ Highly Recommended | Given the ambiguity, apply for an Advance Ruling to lock in the 35% rate (2522/6902) vs 38%. |
β 2. Declaration Strategy (Key Mantra)
π₯ "Prove the Lime, Prove the Brick, Avoid the Chemical Trap!"
| Scenario | Correct Declaration Strategy | Wrong Approach |
|---|---|---|
| Lime-Based Mortar | Declare under 2522.20.00.00 with TDS showing high CaO content. | Calling it "Refractory Mortar" without chemical proof β Risk of 3816 (38%). |
| Ceramic Accessory | Declare under 6902.xx.xx as "Component for Refractory Structures." | Calling it "Chemical Bonding Agent" β Risk of 3816. |
| Generic "Mortar" | Declare under 3816.00.20.10 if composition is unclear. | Ambiguous description β Seizure or reclassification penalty. |
β 3. Special Circumstances Handling
| Situation | Handling Advice |
|---|---|
| OEM/Contract Manufacturing | Provide the clientβs specification sheet that explicitly demands "Refractory Compliance" to support Chapter 69 classification. |
| Mixed Containers | If mixed with other goods, ensure the mortar is clearly separated in packing list. Mixed declarations can trigger full container inspection. |
| High Volume Imports | Apply for Section 301 Exclusions (if applicable for specific chemical products) or negotiate duty drawbacks if re-exported. |
π V. Global Market Customs Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Key Certification/Requirement | Remarks |
|---|---|---|---|---|
| πΊπΈ USA | 2522.20.00.00 or 3816.00.20.10 |
35% or 38% | None specific, but TDS essential for defense | Highest tariff risk; 301 + IEEPA apply. |
| π¨π³ China | 2522.20.00.00 or 6902.xx.xx |
0% - 5% | Standard GB standards | No additional surtaxes. |
| πͺπΊ EU | 2522.20.00 or 6902.xx.xx |
0% - 6.5% | REACH Registration for chemicals | Refractory mortars may need REACH compliance if chemical. |
| π¬π§ UK | 2522.20.00 or 3816.00 |
0% - 6% | UK REACH | Post-Brexit rules apply. |
| π¦πΊ Australia | 2522.20.00 |
5% | None specific | Competitive rate. |
π Conclusion: - USA is the most challenging market due to layered tariffs (301 + IEEPA). - Aim for 35% (2522/6902) rather than 38% (3816) to save 3% on CIF value. - Documentation is your best defense. Vague descriptions like "Industrial Mortar" will trigger audits.
π VI. Common Mistakes & Pitfall Guide (Blood-Tested Lessons)
β Mistake 1: Calling it "Building Adhesive" or "Glue" π Consequence: Customs may classify it under Chapter 35 (Protein Substances) or Chapter 39 (Plastics), leading to complex regulatory checks or higher duties.
β Mistake 2: Omitting "Refractory" in the description π Consequence: Treated as general construction mortar (usually higher duty or stricter environmental controls), losing the "Refractory" benefit.
β Mistake 3: Assuming 0% base rate means 0% total tax π Consequence: Forgetting the +25% (301) +10% (IEEPA) surtaxes. The real cost is 35%.
β Mistake 4: Using "Cement" without specifying "Refractory" π Consequence: Classified under Chapter 30 (Pharmaceuticals) or 38 (Misc) incorrectly, causing declaration delays.
β Correct Action:
"Refractory High-Strength Mortar for Firebricks, Lime-Based, Chemical Analysis Attached, HS 2522.20.00"
π― VII. Conclusion: Precision Classification Saves Money!
π― Remember the Mantra:
πΉ "Lime Base = 2522 (35%) | Ceramic Fit = 6902 (35%) | Chemical Mix = 3816 (38%)"
πΉ "3% Savings per CIF Value is significant on large volumes!"
πΉ "TDS is Key. Without it, you risk the 38% penalty."
π Pro Tip:
If your mortar contains high percentages of Alumina (Al2O3), push for 6902 classification. If it is primarily Calcium Oxide (CaO), push for 2522. Both are 35% vs 38%.
Apply for an Advance Ruling from CBP before shipment to lock in the lower rate and avoid post-import audits.
π£ Immediate Action:
π Contact your freight forwarder with the Technical Data Sheet (TDS).
π Secure the 35% Tariff, avoid the 38% trap, and ensure smooth US Customs clearance.
β¨ Professional Clearance Starts with Precise Classification!
πΌ Every Percent Counts in High-Volume Industrial Imports!
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.