保温砂浆
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 6810990020 | 35.0% | CN | US | Official Doc |
| 6810990040 | 35.0% | CN | US | Official Doc |
| 3824500010 | 35.0% | CN | US | Official Doc |
| 3824405000 | 40.0% | CN | US | Official Doc |
| 3824401000 | 41.5% | CN | US | Official Doc |
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AI Analysis
🧱 Thermal Insulation Mortar (Thermal Insulation Plaster)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: Do You Really Understand "Thermal Insulation Mortar"?
Thermal insulation mortar is a specialized building material used primarily for wall thermal insulation and energy-saving retrofitting in construction. It is typically a dry-mixed powder composed of cement, light aggregates (such as expanded perlite, vermiculite, or polystyrene beads), and various polymer additives. In international trade, its classification depends heavily on its primary composition and functional intent.
It is generally categorized into two main streams in the US Tariff Schedule: 1. Cement/Concrete/Hypotherm Products: If the primary binder is cement/concrete and it serves a structural or standard construction coating function. 2. Chemical Preparations: If the primary value comes from specific chemical admixtures, additives, or if it is a non-refractory mortar formulated with significant chemical properties.
⚠️ Key Distinction Point:
- If it is primarily a cementitious blend used for standard building coating/insulation → Chapter 68 (Articles of Stone, Plaster, Cement...)
- If it is considered a chemical preparation (non-refractory mortar with significant chemical additives) → Chapter 38 (Miscellaneous Chemical Products)
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Classification Logic |
|---|---|---|---|
6810.99.00.40 |
Cement, concrete, or artificial stone articles (Other) | Standard thermal insulation mortar based on cement, non-specific large-size flat slabs, dry-mix mortar for construction | ✅ Cementitious Product |
6810.99.00.20 |
Other articles of cement, concrete, or artificial stone | Decorative construction material, cement-based thermal insulation plaster, general building material | ✅ Cementitious Product |
3824.50.00.10 |
Prepared binders for foundry molds or cores; Chemical preparations and products (Non-refractory mortars) | Non-refractory mortar with significant chemical additive content, chemical industrial preparation, functional chemical coating | ✅ Chemical Preparation |
🔍 Key Reminder:
- Chapter 68 (6810.99...): Focuses on the physical structure and material base (cement/concrete). This is the most common classification for standard cement-based thermal insulation mortars. - Chapter 38 (3824.50...): Focuses on the chemical formulation. If the mortar is heavily reliant on specific chemical admixtures for its thermal properties or binding, it may fall here. - Do Not Misclassify: Do not classify as simple "construction materials" without specifying the cement/chemical nature, as duties vary significantly.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surtaxes & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Date: From November 10, 2025 (including subsequent imports)
🎯 1. 6810.99.00.40 —— Cement/Concrete/Artificial Stone Articles (Other)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% (ad valorem) |
| USITC Surtax (Section 301) | +25% (From USITC Footnote 9903.88.01) |
| IEEPA Surtax (Section 122 / 232 related) | +10% (Targeting Chinese/HK products, effective from Nov 10, 2025) |
| Total Tariff Rate | 35% |
| Tax Calculation | CIF Value × 35% |
| De Minimis Exemption Eligible? | ❌ No (deny_de_minimis) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:6810.99.00.40 → FOOTNOTE:9903.88.01 |
📌 Explanation:
- The "25% USITC Surtax" is imposed under the US Trade Act Section 301; - The "10% IEEPA Surtax" is an additional levy under the International Emergency Economic Powers Act; - Total 35% is a high tariff rate for construction materials. Advance planning is essential!
🎯 2. 6810.99.00.20 —— Other Cement/Concrete/Artificial Stone Articles
| Item | Content |
|---|---|
| Base Tariff Rate | 0% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff Rate | 35% |
| Tax Calculation | CIF × 35% |
| De Minimis Exemption Eligible? | ❌ No |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:6810.99.00.20 → FOOTNOTE:9903.88.01 |
📌 Note:
- Identical tax rate to the previous code; - Applies to cement-based thermal insulation plasters classified as "other" articles; - Whether it is "exterior wall insulation mortar" or "interior thermal plaster," if it's cement-based, it falls here.
🎯 3. 3824.50.00.10 —— Chemical Preparations (Non-refractory Mortars)
| Item | Content |
|---|---|
| Base Tariff Rate | 0% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff Rate | 35% |
| Tax Calculation | CIF × 35% |
| De Minimis Exemption Eligible? | ❌ No |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3824.50.00.10 → FOOTNOTE:9903.88.01 |
📌 Note:
- Even if classified under Chapter 38 (Chemicals), the surtaxes remain the same for Chinese origin goods; - This classification might be used if the product is marketed heavily on its chemical composition or additive performance rather than just its cement base; - Total 35% applies regardless of the Chapter 68 vs. 38 distinction for Chinese imports under current policies.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance Guide)
✅ 1. Required Documentation Checklist (All Are Mandatory)
| Document | Must Provide | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Includes composition (cement %, aggregate type, additive %), thermal conductivity, density, application method |
| ✅ Certificate of Analysis (COA) | ✔️ | Details chemical components, proving it is non-refractory if claiming 3824.50 |
| ✅ Product Photos (Including Label) | ✔️ | Clear view of packaging, brand, model, net weight, and ingredient list |
| ✅ Third-Party Test Report | ✔️ | ASTM C1582 (Thermal Insulation), ASTM C1413 (Air Permeability), MSDS (Safety Data Sheet) |
| ✅ Commercial Invoice | ✔️ | Clearly state "Thermal Insulation Mortar" or "Cement-Based Insulation Plaster" |
| ✅ Packing List | ✔️ | Specify net/gross weight, number of bags, pallet configuration |
| ✅ Bill of Lading (B/L) | ✔️ | Consistent with invoice and packing list |
✅ 2. Declaration Tips (Key Mnemonic)
🔥 "Identify Base, Declare Accurately, Avoid 'Generic' Terms, Cut Risks!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Standard Cement-Based Mortar | 6810.99.00.40 or 6810.99.00.20 |
Misdeclare as "Chemical Product" → Audit risk |
| High-Chemical-Additive Mortar | 3824.50.00.10 |
Misdeclare as "Simple Stone Article" → Classification dispute |
| Mixed Bags (Cement + Plastic Beads) | Declare as Finished Mortar (6810 or 3824) |
Declare as "Cement" + "Plastic Beads" separately → Higher combined duty/customs scrutiny |
| Generic "Building Material" | Specific Description Required | Use vague terms like "Construction Material" → Delay/Seizure |
✅ 3. Special Cases Handling
| Scenario | Handling Advice |
|---|---|
| OEM Custom Mortar | Provide formulation ratio or product spec sheet to prove classification. If >50% cement, lean towards 6810. |
| Pre-mixed vs. On-site Mix | Pre-mixed dry powder in bags is 6810/3824. On-site mixing of raw materials may have different rules. |
| Non-Refractory Claim | If using 3824.50.00.10, ensure MSDS confirms it is not heat-resistant beyond standard construction limits. |
| Lightweight Aggregates | If perlite/vermiculite content is very high, ensure the primary function is still "mortar/coating" and not just "filler." |
🌍 V. Global Major Market Clearance Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 6810.99.00.40 / 3824.50.00.10 |
35% (China Origin) | MSDS, ASTM Tests | High tariff due to Surtax + IEEPA |
| 🇨🇳 China | 6810.99.00.40 |
5-8% | CCC (if applicable), GB Standards | No surtaxes |
| 🇪🇺 EU | 6810.91.00 |
3% | CE Marking, REACH Compliance | Lower base tariff, but strict environmental rules |
| 🇬🇧 UK | 6810.91.00 |
3% | UKCA Marking | Post-Brexit rules apply |
| 🇦🇺 Australia | 6810.91.00 |
5% | AS/NZS Standards | Standard construction material duties |
📌 Conclusion:
- The US market is the most challenging due to the 35% combined tariff (0% base + 25% Section 301 + 10% IEEPA); - European and Asian markets have lower base tariffs but strict environmental and safety certifications (REACH, CE, ASTM); - Cost Impact: The 35% US tariff significantly erodes margins. Consider supply chain diversification (e.g., third-country assembly) if applicable.
📌 VI. Common Errors & Pitfall Guide (Lessons Learned the Hard Way)
❌ Error 1: Declaring as "Cement" only
👉 Consequence: Wrong HS Code (2523 vs 6810), potential duty evasion claims, fines!
❌ Error 2: Declaring as "Chemicals" without MSDS
👉 Consequence: Customs holds shipment for chemical safety review → Delays of weeks.
❌ Error 3: Ignoring the 10% IEEPA Surtax
👉 Consequence: Underpayment of 10% on CIF value → Back taxes + Penalties upon audit.
❌ Error 4: Mislabeling as "Plaster of Paris" (Gypsum)
👉 Consequence: Gypsum (2520) has different duties and rules. If it's cement-based, not gypsum → Refusal of Entry.
✅ Correct Practice:
"Thermal Insulation Mortar, Cement-Based, with Expanded Perlite Aggregate, Dry-Mix Powder, ASTM C1582 Certified, Model XYZ, Net Weight 25kg/bag"
🎯 VII. Conclusion: Professional Declaration, Save Time, Reduce Costs!
🎯 Remember the Mnemonic:
🔹 "Cement Base = 6810, Chemical Base = 3824, Both 35%, No De Minimis!"
🔹 "HS Code is Key, 35% Rate is High, Accurate Declaration Saves Thousands!"
📌 Pro Tip:
If your product is originating from Vietnam, Mexico, Thailand, or Malaysia, you may apply for IEEPA Exemptions or USMCA/ASEAN Free Trade Preferences, potentially reducing the effective tariff to 0%~5%.
Recommendation: Apply for an Advance Ruling from US Customs and Border Protection (CBP) to confirm the HS Code and duty liability before shipping.
📣 Immediate Action:
📞 Contact a Professional Customs Broker + Provide Product Specs + Apply for CBP Advance Ruling
🚀 Ensure your Thermal Insulation Mortar Clears Customs Smoothly, Exports Efficiently, and Maximizes Profit!
✨ Professional Clearance Starts with Accurate Classification!
💼 Every Cent of Your Cost Deserves Precise Calculation!
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) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — 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 — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — 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.