High performance Casting Adhesive
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3506915000 | 37.1% | CN | US | Official Doc |
| 3506990000 | 37.1% | CN | US | Official Doc |
| 3926909989 | 22.8% | CN | US | Official Doc |
| 3926904590 | 13.5% | CN | US | Official Doc |
| 3824100000 | 41.0% | CN | US | Official Doc |
| 3824999397 | 40.0% | CN | US | Official Doc |
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ποΈ High Performance Casting Adhesive: The Ultimate HS Code & Tariff Guide (2026 Edition)
π HS Code Classification & Customs Clearance Strategy | 2026 Tax Breakdown | Expert Level Guidance
π I. Product Definition & Classification: What Makes an Adhesive "High Performance"?
High Performance Casting Adhesives are specialized chemical preparations designed for bonding substrates under extreme conditions (high heat, chemical exposure, structural load). In international trade, these are primarily categorized under Chapter 35 (Animal/Plant Substances; Prepared Glues) or Chapter 38 (Chemical Industries).
The classification hinges on two critical factors: 1. Composition: Is it based on polymers (Plastics/Rubber - Ch. 39) or other chemical binders (e.g., foundry binders)? 2. Packaging: Is it retail packaging (β€1 kg) or bulk industrial (>1 kg)?
β οΈ Critical Distinction: * Based on Polymers (Ch. 3901-3913): Most high-performance epoxy, acrylic, or silicone casting adhesives fall here. * If β€1 kg & Retail sold: 3506.91.50.00 * If >1 kg or not based on 3901-3913: 3506.99.00.00 * Foundry Binders: Specifically for mold cores (sand casting): 3824.10.00.00. * Plastic Parts (Seals/Gaskets) made from these materials: 3926.90.99.89 or 3926.90.45.90.
π¦ II. HS Code Classification Matrix (2026 Latest Tariff Schedule)
Based strictly on your provided data, here is the authoritative mapping for High Performance Casting Adhesives.
| HS Code | Product Description | Key Characteristics | Tax Detail (Base + Additional) | Total Tax |
|---|---|---|---|---|
3506.91.50.00 |
Prepared Glues based on Polymers (3901-3913) | β
Polymer-based β Retail Pack β€1 kg β High Perf Casting |
Base: 0.0% Add: 0.0% |
0.0% π’ |
3506.99.00.00 |
Other Prepared Glues & Adhesives | β Non-polymer base OR β Bulk/Industrial (>1 kg) β Not "Other" polymer type |
Base: 2.1% Add: 25.0% |
27.1% π |
3824.10.00.00 |
Prepared Binders for Foundry Molds/Cores | π Specific for Sand Casting Molds π Not general casting adhesive |
Base: 6.0% Add: 25.0% |
31.0% π΄ |
3824.99.93.97 |
Other Chemical Products/Preparations | π§ͺ General chemical mixtures π« Not foundry binders π« Not polymer-based glues |
Base: 5.0% Add: 25.0% |
30.0% π΄ |
3926.90.45.90 |
Other Plastic Articles: Gaskets, Washers, Seals | π Finished Products (e.g., Cast Seals) π Made from plastics |
Base: 3.5% Add: 25.0% |
28.5% π΄ |
3926.90.99.89 |
Other Plastic Articles (Not Elsewhere Specified) | π Finished Plastic Parts π General "Other" plastic items |
Base: 5.3% Add: 7.5% |
12.8% π‘ |
π Key Insight: * The "Polymer" Sweet Spot: If your casting adhesive is based on polymers (epoxies, polyurethanes) and sold in retail units (β€1kg), you enjoy a 0% Tax Rate. * The "Bulk/Other" Trap: If the same adhesive is sold in 5kg buckets or if it's not polymer-based, the tariff jumps to 27.1% - 30.0%. * Foundry Warning: Do not confuse "casting adhesive" (gluing parts) with "foundry binder" (binding sand molds). The latter carries a 31.0% penalty.
π° III. 2026 Tax Rate Breakdown & Legal Basis
β Applicable Region: United States (US)
β Origin: China (CN) (Implied by "Additional Tariff" data)
β Effective Date: 2025/2026 Period
π― Scenario A: The "Sweet Spot" (3506.91.50.00)
- Product: High-performance epoxy adhesive, 500g jar, polymer-based.
- Tax Calculation:
- Base Tariff: 0.0%
- Additional Tariff: 0.0%
- Total Duty: $0.00 per $1.00 CIF Value.
- Why? This falls under the "Exclusion Zone" for polymer-based adhesives in retail packaging.
π― Scenario B: The "Bulk/General" Category (3506.99.00.00)
- Product: Same epoxy, but sold in 5kg industrial pails OR non-polymer resin.
- Tax Calculation:
- Base Tariff: 2.1%
- Additional Tariff (Section 301): 25.0%
- Total Duty: 27.1%
- Impact: On a $10,000 shipment, you pay $2,710 in duties alone.
π― Scenario C: Foundry Binders (3824.10.00.00)
- Product: Resin binder for sand casting molds.
- Tax Calculation:
- Base Tariff: 6.0%
- Additional Tariff: 25.0%
- Total Duty: 31.0%
- Risk: High scrutiny on product description. If customs thinks you are selling "glue" but declared as "foundry binder," you face audits.
π οΈ IV. Customs Clearance Strategy & Expert Tips
β 1. Documentation Checklist (Non-Negotiable)
| Document | Requirement | Why? |
|---|---|---|
| Technical Data Sheet (TDS) | Must specify polymer composition (e.g., "Based on epoxy/polyurethane"). | To prove eligibility for 3506.91.50.00. |
| Packaging Declaration | Must state Net Weight < 1 kg for retail units. | Critical for 3506.91.50.00 vs 3506.99.00.00. |
| Chemical Composition List | List all ingredients (CAS numbers). | To rule out "Foundry Binders" (3824.10). |
| Commercial Invoice | Explicitly state "Prepared Glue for Casting" + "Retail Pack". | Avoids misclassification as "Other Chemicals" (3824.99). |
| Safety Data Sheet (SDS) | Required for hazmat shipping. | Chemical regulations (DOT/UN38.3). |
β 2. Strategic Declaration Rules
π₯ Golden Rule: "Polymer + Retail = 0% Cost"
| Situation | Correct HS Code | Risk of Wrong Code |
|---|---|---|
| Epoxy, 100g tube | 3506.91.50.00 (0%) |
β If declared 3506.99.00.00 β Loss of 27.1% |
| Epoxy, 20kg Drum | 3506.99.00.00 (27.1%) |
β If declared 3506.91.50.00 β Penalty + Back Taxes |
| Sand Mold Binder | 3824.10.00.00 (31%) |
β If declared as "General Glue" β Underpayment |
| Cast Plastic Gasket | 3926.90.45.90 (28.5%) |
β If declared as "Adhesive" β Wrong Chapter |
β 3. Special Handling & Avoidance Strategies
- π« Avoid "General Chemical" Labeling: Do not label your product as "Chemical Preparation" (which leads to
3824.99.93.97at 30.0%). Always specify "Prepared Adhesive". - βοΈ Weight Splitting: For high-value orders, consider splitting large bulk shipments into smaller retail-sized units (if logistics allow) to leverage the 0% rate, provided the end-user is a retail consumer, not a manufacturer. Warning: If customs detects "bundling" to avoid duties, they will reject the claim.
- π Foundry Distinction: Clearly differentiate between "Casting Adhesive" (joining parts) and "Foundry Binder" (shaping sand).
- Casting Adhesive β Chapter 35
- Foundry Binder β Chapter 38
π V. Market Comparison (Quick Look)
| Market | HS Code for Polymer Glue (Retail) | Tariff Trend |
|---|---|---|
| πΊπΈ USA | 3506.91.50.00 |
0% (Excellent) vs 27.1% (Bulk) |
| πͺπΊ EU | Similar Code | Usually lower, but requires REACH compliance. |
| π¨π³ China | Export to US | High volatility on "Section 301" additional tariffs. |
π VI. Common Pitfalls & How to Avoid Them
β Pitfall 1: Declaring a 5kg bucket of epoxy as "Retail Adhesive".
π Consequence: Customs will flag it as
3506.99.00.00β 27.1% Tax. β Fix: Ensure invoice states "Net Weight: X kg" and matches the HS Code criteria.
β Pitfall 2: Calling a Foundry Binder a "Casting Adhesive".
π Consequence: Customs may reclassify to
3824.10.00.00β 31.0% Tax. β Fix: Be explicit: "Adhesive for metal joining" vs "Binder for sand molds".
β Pitfall 3: Ignoring the "Other" classification (3824.99.93.97).
π Consequence: If the adhesive contains non-standard chemicals not in 3506 or 3901-3913, it falls here β 30.0% Tax. β Fix: Verify chemical composition against Chapter 35 and 39 definitions.
π― VII. Conclusion: Optimize Your Customs Strategy
For High Performance Casting Adhesives, the difference between 0% and 31% tax lies in two variables: 1. Base Material (Polymer vs. Chemical). 2. Packaging Size (β€1kg Retail vs. Bulk).
π Action Plan: 1. Verify Composition: Ensure your adhesive is polymer-based (Ch. 3901-3913). 2. Control Packaging: Keep retail units under 1kg for the 0% rate. 3. Document Everything: TDS, SDS, and Invoice must match the HS Code definition perfectly. 4. Avoid Foundry Confusion: Don't mix up "Glue" with "Mold Binder".
π£ Final Warning:
Misclassification is expensive. A 27% or 31% duty on a high-value casting adhesive shipment can wipe out your profit margin. Get a pre-classification ruling (Binding Ruling) from Customs before your first shipment.
β¨ Smart Trade Starts with Smart Classification!
πΌ Don't let tax rules bind youβlet data liberate your supply chain.
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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.