Concrete Anti seepage Additive
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3910000000 | 38.0% | CN | US | Official Doc |
| 3910000000 | 38.0% | CN | US | Official Doc |
| 3402905050 | 38.7% | CN | US | Official Doc |
| 3402905030 | 38.7% | CN | US | Official Doc |
| 3824405000 | 40.0% | CN | US | Official Doc |
| 3824402000 | 35.0% | CN | US | Official Doc |
Product Images
AI Analysis
ποΈ Concrete Anti-Seepage Additive: The Ultimate 2026 HS Code & Tax Strategy Guide
π Global Trade Compliance & Customs Clearance | 2026 Tariff Breakdown | High-Stakes Import Guide
π δΈγProduct Definition: Is It a "Cleaning Agent" or a "Chemical Binder"?
Concrete Anti-Seepage Additives are specialized chemical formulations designed to be mixed into concrete or mortar to reduce water permeability. In international trade, the classification often causes confusion between "Cleaning/Cleaning Preparations" and "Chemical Additives for Construction."
Crucial Distinction for Classification:
* β NOT a Cleaning Agent: Even if the product is liquid or paste-like, it is NOT classified under 3402 (Cleaning/Washing preparations) if its primary function is to strengthen/modify the concrete structure, not to clean surfaces.
* β
IS a Chemical Additive: It falls under Chapter 38 as a "Prepared binder" or "Chemical product for cements/mortars."
β οΈ Key Differentiator:
- If the product contains surfactants only for cleaning concrete surfaces β Heading 3402.
- If the product contains silane/siloxane/polymer emulsions for mixing into concrete to stop leaks β Heading 3824.
- Silicone-based additives (common for anti-seepage) may also fall under Heading 3910 if they are "Silicones in primary forms."
π¦ δΊγHS Code Classification Matrix (2026 Data Source)
Based on your specific product data, here are the only three valid classifications for Anti-Seepage Additives, ranked by likelihood:
| HS Code | Product Description | Applicable Scenario | Tax Rate (Total) |
|---|---|---|---|
3824.40.50.00 |
Prepared additives for cements, mortars or concretes: Other | Most common for organic/inorganic polymer additives mixed into concrete to prevent leaks. | 30.0% |
3824.40.20.00 |
Prepared additives... Consisting wholly of inorganic substances | Pure inorganic crystalline additives (e.g., certain salts, minerals) used for sealing. | 25.0% |
3910.00.00.00 |
Silicones in primary forms | If the additive is a pure silicone polymer (e.g., silane/siloxane) used as the main active ingredient before mixing. | 28.0% |
π Why NOT
3402.90.50?
The items3402.90.50.30(Cleaning preparations) and3402.90.50.50(Other organic surface-active agents) are NOT the correct classification for anti-seepage additives meant to be mixed into the concrete mix. These HS codes are for products used to clean concrete or surfaces, not to seal them. Misclassification here can lead to severe penalties or shipment rejection.
π° δΈγ2026 Tariff Breakdown (Detailed Tax Analysis)
β Origin: China (CN)
β Target Market: United States (US)
β Status: High-risk category for "China+1" tariffs and Section 301.
π― Scenario A: General Polymer Additive (3824.40.50.00)
Most likely classification for modern organic anti-seepage agents.
| Tax Component | Rate | Legal Basis |
|---|---|---|
| Base Duty (MFN) | 5.0% | Standard Most Favored Nation rate. |
| Section 301 (Add-on) | +25.0% | US Trade Representative (USTR) List 4A (Chemicals). |
| Total Effective Rate | 30.0% | Base + Add-on |
| Tax Calculation | CIF Value Γ 30% | Payable upon entry. |
| De Minimis Exemption | β No | High-value industrial chemicals do not qualify for $800 exemption. |
π Interpretation:
This is a high-cost classification. The 25% "Section 301" tax is non-negotiable for Chinese-origin goods. If your product is a "prepared additive," this is the default tariff unless you can prove it is purely inorganic (3824.40.20.00).
π― Scenario B: Pure Inorganic Additive (3824.40.20.00)
For mineral-based, salt-based, or crystalline anti-seepage powders.
| Tax Component | Rate | Legal Basis |
|---|---|---|
| Base Duty (MFN) | 0.0% | Preferential rate for inorganic preparations. |
| Section 301 (Add-on) | +25.0% | Still subject to the 25% penalty for "other chemical products." |
| Total Effective Rate | 25.0% | Base 0% + Add-on 25% |
| Tax Calculation | CIF Value Γ 25% | 5% cheaper than Scenario A! |
| De Minimis Exemption | β No | Still restricted. |
π Strategy Alert:
If you can formulate your additive to be "Consisting wholly of inorganic substances" (e.g., removing organic polymers), you save 5% of the CIF value. This is a critical engineering and cost-saving opportunity.
π― Scenario C: Silicone-based Additive (3910.00.00.00)
For products where Silicone is the primary raw material.
| Tax Component | Rate | Legal Basis |
|---|---|---|
| Base Duty (MFN) | 3.0% | Standard rate for Silicones. |
| Section 301 (Add-on) | +25.0% | High penalty on silicones. |
| Total Effective Rate | 28.0% | Base 3% + Add-on 25% |
| Tax Calculation | CIF Value Γ 28% | Cheaper than 3824.40.50 (by 2%) |
π Interpretation:
If your anti-seepage agent is 90%+ Silicone (e.g., silane coupling agents), classifying under3910might save 2% compared to the general "Other" category (3824.40.50.00). However, this requires strict proof of the chemical composition.
π οΈ εγCustoms Clearance Strategy (Action Plan)
β 1. Pre-Shipment Documentation Checklist (Must-Haves)
| Document | Requirement | Why It Matters |
|---|---|---|
| Technical Data Sheet (TDS) | Must specify: "For mixing into concrete," not "Cleaning." | Proves function to Customs (avoids 3402 misclassification). |
| Formula Composition Sheet | Must list % of Organic vs. Inorganic ingredients. | Determines if you qualify for 3824.40.20.00 (Inorganic) or 3910 (Silicone). |
| Safety Data Sheet (SDS) | Must show HS Class 8 or 9 (Corrosive/Environmental). | Required for hazardous chemical transport (DOT/IMO). |
| Commercial Invoice | Description: "Prepared Additive for Cement/Mortar" (NOT "Surfactant" or "Cleaner"). | Prevents red-flag triggers for "Cleaning" codes (3402). |
| Certificate of Analysis (COA) | Proof of active ingredients (e.g., Silane content). | Validates 3910 or 3824 claim. |
β 2. Declaration Tips (The "Golden Rules")
π₯ Rule #1: Function Over Form
Do NOT describe the product as "Surfactant," "Detergent," or "Cleaning Prep" (even if it contains organic surface-active agents).
Correct Phrasing: "Prepared additive for cements, mortars or concretes, for anti-seepage purposes."π₯ Rule #2: The "Inorganic" Loophole
If your product is a powder or mineral-based liquid, explicitly state: "Consisting wholly of inorganic substances" on the invoice and packing list to target the 25% rate (3824.40.20.00) instead of 30%.π₯ Rule #3: Silicone Verification
If the product is 95% Silicone, declare under3910.00.00.00(28% tax) to save the 2% difference compared to the general3824category.
β 3. Common Pitfalls & Risk Avoidance
| β Mistake | π¨ Consequence | β Fix |
|---|---|---|
Declaring as "Surface Cleaning Agent" (3402) |
Rejection/Seizure (Wrong function) | Change to "Concrete Additive" (3824) |
| Failing to disclose Inorganic composition | Pay 30% tax instead of 25% | Submit COA proving "wholly inorganic" status |
| Calling it "Silicone Oil" without % proof | Customs forces 3824 classification (28-30%) |
Provide Lab Report showing >90% Silicone |
| Shipping as "General Chemical" | Audit Trigger (Delay 10-14 days) | Use precise HS Code description in "Commodity Name" |
π δΊγMarket Comparison & Strategy
| Strategy | HS Code | Total Tax | Recommended For |
|---|---|---|---|
| Standard Polymer Additive | 3824.40.50.00 |
30% | Most modern waterproofing admixtures. |
| Mineral/Salt Additive | 3824.40.20.00 |
25% | Best Cost option (if chemically feasible). |
| Silicone-Based | 3910.00.00.00 |
28% | High-performance silane sealers. |
π Conclusion:
The 25% tax rate (3824.40.20.00)is the "Holy Grail" for anti-seepage additives. If your R&D team can remove organic solvents/polymers, you instantly save 5% of your total landed cost. Do not assume "3402" (cleaning) applies; that is the most dangerous misclassification.
π ε γFinal Checklist for Shippers
- [ ] Verify Formula: Is it Inorganic? (Target
3824.40.20.00) OR Silicone? (Target3910) OR General? (Target3824.40.50.00). - [ ] Update Invoice: Ensure description explicitly states "Prepared Additive for Cements/Mortars".
- [ ] Prepare COA: Have the Certificate of Analysis ready to prove composition.
- [ ] Budget for 30%: Plan for the worst-case scenario (30%) unless you can prove otherwise.
- [ ] Avoid
3402: Never use "Surfactant" or "Cleaning Preparation" in the commodity name.
π― Bottom Line:
"Don't Clean, Don't Wash β You are Sealing!"
Misclassifying a concrete sealer as a cleaner (3402) leads to compliance failure.
Optimize your chemical formula to hit the 25% tax bracket (3824.40.20.00).
π£ Call to Action:
Contact your chemical supplier for a "Composition Declaration" immediately.
Review your HS Code with a customs broker before shipping.
Secure your supply chain with the right 2026 Tax Strategy!
β¨ Precision Classification = Profit Protection
πΌ Every 1% saved on tax is pure margin gained!
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.