concrete interface agent
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3506105000 | 37.1% | CN | US | Official Doc |
| 3506990000 | 37.1% | CN | US | Official Doc |
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ποΈ Concrete Interface Agent (Construction Adhesives & Sealants)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π 1. Product Definition & Classification: Do You Really Understand "Concrete Interface Agent"?
A Concrete Interface Agent (also known as concrete bonding agent, interface treatment agent, or primer) is a chemical product used in construction to improve the adhesion between old and new concrete, or between concrete and other materials (such as plaster, tile, or epoxy). In international trade, it falls under the broad category of "Prepared Glues and Other Prepared Adhesives."
The classification depends heavily on packaging and chemical composition:
- Retail-Sale Packs (β€ 1 kg Net Weight): Products packaged in small containers (bottles, tubes, jars) specifically designed for retail sale, weighing 1 kg or less, are classified under 3506.10.50.00.
- Bulk or Other Adhesives: Products not specified elsewhere, or those packaged in larger quantities, or those with different chemical bases (e.g., epoxy, polyurethane, silicone not covered by specific retail headings), fall under 3506.99.00.00.
β οΈ Key Distinction Point:
- If the product is packaged for retail sale and the net weight is β€ 1 kg βε½ε ₯ 3506.10.50.00
- If the product is bulk, industrial packaging, or not explicitly for retail βε½ε ₯ 3506.99.00.00
π¦ 2. HS Code Classification Details (2026 Latest Tariff Authorityε―Ήη §)
| HS Code | Product Description | Applicable Scenario | Packaging/Weight Condition |
|---|---|---|---|
3506.10.50.00 |
Products suitable for use as glues or adhesives, put up for retail sale, net weight β€ 1 kg: Other | Small bottles/jars of concrete primer, retail epoxy paste, ready-to-use bonding agents | β Retail Packaging, β€ 1 kg |
3506.99.00.00 |
Prepared glues and other prepared adhesives, n.e.s.: Other: Other | Bulk drums, industrial containers, large sacks, or adhesives not meeting the retail β€ 1 kg criteria | β Bulk/Industrial/Other |
π Important Reminder:
- Packaging is critical: A concrete adhesive in a 5kg bucket is not considered "retail sale β€ 1 kg" and should be classified under 3506.99.00.00.
- Chemical Composition: Both codes cover "prepared adhesives," so the key differentiator is packaging intent and weight, not just the chemical formula.
π° 3. 2026 Latest Tariff Rate Details (Including Additional Duties & Policy Surcharge)
β Applicable Country: United States (US)
β Country of Origin: China (CN)
β Effective Time: From November 10, 2025 (including subsequent imports)
π― 1. 3506.10.50.00 ββ Retail-Adhesives (β€ 1 kg)
| Item | Content |
|---|---|
| Base Tariff | 0% (ad valorem) |
| USITC Additional Duty | 0% (No additional duty under Footnote 9903.88.01 for this specific subheading) |
| IEEPA Additional Duty | 0% (No surcharge under IEEPA for this category) |
| Total Tariff Rate | 0% |
| Tax Calculation | CIF Value Γ 0% = $0 |
| De Minimis Eligibility | β Yes (Eligible for de minimis if value < $800, but note: No IEEPA/USITC duty applies anyway) |
| Legal Basis Path | HTSUS:3506.10.50.00 β No Footnote 9903.88.01 β No IEEPA Surcharge |
π Explanation:
- This is a ZERO-TARIFF category for Chinese-origin goods under the current US trade policy.
- Unlike electronics or solar panels, small-packaged adhesives do not attract the 25% USITC or 10% IEEPA surcharges.
- Advantage: High margin potential, low customs risk.
π― 2. 3506.99.00.00 ββ Other Prepared Adhesives (Bulk/Non-Retail)
| Item | Content |
|---|---|
| Base Tariff | 2.1% (ad valorem) |
| USITC Additional Duty | +25% (from USITC Footnote 9903.88.01) |
| IEEPA Additional Duty | +10% (ιε―ΉδΈε½/ι¦ζΈ―δΊ§εοΌθͺ2025εΉ΄11ζ10ζ₯θ΅·) |
| Total Tariff Rate | 27.1% |
| Tax Calculation | CIF Value Γ 27.1% |
| De Minimis Eligibility | β No (deny_de_minimis for surcharged goods) |
| Legal Basis Path | IEEPA:9903.01.25 β IEEPA:9903.01.24 β USITC:3506.99.00.00 β FOOTNOTE:9903.88.01 |
π Note:
- High Duty Burden: The combination of base duty (2.1%) + USITC (25%) + IEEPA (10%) results in a 27.1% total duty.
- No De Minimis: Goods under $800 are not exempt from these surcharges if classified under this code.
- Impact: This significantly reduces profitability for bulk adhesive imports.
π οΈ 4. Customs Clearance Practical Advice (Practical Pitfall Avoidance Guide)
β 1. Required Documents Checklist (None Missing)
| Document | Must Provide | Description |
|---|---|---|
| β Product Specification Sheet | βοΈ | Chemical composition, usage instructions, net weight per unit |
| β Safety Data Sheet (SDS) | βοΈ | Required for chemical products; confirm if classified as hazardous |
| β Product Photos (Including Label) | βοΈ | Clear view of packaging, net weight, and "Retail Sale" indication |
| β Commercial Invoice | βοΈ | Must explicitly state "Prepared Adhesive for Retail Sale" or "Bulk Adhesive" |
| β Packing List | βοΈ | Detail individual units vs. total pallet weight |
| β Certificate of Origin (CO) | βοΈ | Confirm origin as China to apply correct surcharge rules |
β 2. Declaration Tips (Key Mantra)
π₯ "Packaging Defines Code: Retail β€ 1kg = 0%, Bulk = 27.1%!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Small 500ml bottle of primer | 3506.10.50.00 |
Misdeclare as bulk β 27.1% duty |
| 20kg drum of bonding agent | 3506.99.00.00 |
Misdeclare as retail β Penalties |
| Mixed shipment (some β€1kg, some >1kg) | Split Declaration | Combine into one code β Audit risk |
β 3. Special Cases Handling
| Situation | Handling Advice |
|---|---|
| OEM Private Label | Ensure packaging clearly states "For Retail Sale" and shows net weight β€ 1kg to qualify for 3506.10.50.00 |
| Chemical Composition Change | If switching from water-based to epoxy, still falls under 3506, but verify SDS for hazmat classification |
| Gift Sets (Adhesive + Tools) | If adhesive is the principal value and packaged for retail β€ 1kg, still likely 3506.10.50.00; consult customs broker |
π 5. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification | Notes |
|---|---|---|---|---|
| πΊπΈ USA | 3506.10.50.00 |
0% | SDS Required | Best for retail packs |
| πΊπΈ USA | 3506.99.00.00 |
27.1% | SDS Required | High cost for bulk |
| π¨π³ China | 3506.99.00.00 |
5.0% | CCC (if applicable) | No surcharge |
| πͺπΊ EU | 3506.10 or 3506.99 |
6.0% | CLP/REACH | No additional surcharge |
| π¦πΊ Australia | 3506.10 |
5.0% | AICIS | Competitive |
π Conclusion:
- USA is the most complex market due to the zero vs. 27.1% disparity based solely on packaging.
- EU and China have more uniform tariffs, making classification less critical for duty minimization.
π 6. Common Mistakes & Pitfall Guide (Lessons Learned)
β Mistake 1: Declaring a 2kg bulk drum as "Retail Sale" to avoid 27.1% duty
π Consequence: Customs seizure, fines, and retroactive duty payment.
β Mistake 2: Ignoring SDS for chemical adhesives
π Consequence: Delayed clearance or rejection at port due to hazmat classification issues.
β Mistake 3: Using vague descriptions like "Glue" on Invoice
π Consequence: Customs may reclassify under a higher-duty heading; always use precise HS Code-aligned descriptions.
β Correct Practice:
"Concrete Interface Agent, Water-Based, Packaged for Retail Sale, Net Weight 500g, Model XYZ, SDS Attached"
π― 7. Conclusion: Professional Declaration Saves Money!
π― Remember the Mantra:
πΉ "Retail β€ 1kg = 0% Duty, Bulk = 27.1% Duty! Packaging is King!"
πΉ "HS Code determines survival, tariff difference is huge, declaration error costs thousands!"
π Pro Tip:
If you are importing bulk adhesives for industrial use, consider re-packaging in the US or sourcing from non-China origins (e.g., Vietnam, India) to avoid the 27.1% surcharge.
For retail packs, ensure your packaging clearly states "Net Weight β€ 1kg" and "For Retail Sale" to guarantee 0% duty.
π£ Immediate Action:
π Consult a licensed customs broker + Provide product photos + Apply for Advance Ruling
π Let your concrete adhesives clear smoothly, maximize profits, and expand globally!
β¨ Professional clearance starts with precise classification!
πΌ Every penny of cost deserves precise calculation!
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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.