金属钎焊防溅剂
CN → USAI Analysis
🔥 Metal Brazing Splash Preventer (Anti-Splash Agent)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is "Brazing Splash Preventer"?
Metal brazing splash preventer is a specialized industrial consumable used in metal joining processes (brazing, soldering, welding). Its primary function is to form a temporary protective film on the metal surface before heating, preventing molten braze/solder from spreading uncontrollably (wetting) and protecting the surrounding area from spatter.
Key Forms: * Paste/Cream: Most common for hand brazing and local joint application. * Liquid/Solution: Used for dip-coating or spray applications on large components. * Powder: Less common, used in specific high-temperature furnace brazing.
⚠️ Key Distinction Point:
- If it is a chemical coating (flux-based or ceramic-based) applied to prevent sticking → Classified under Chapter 38 (Miscellaneous Chemical Products).
- If it is a solid tool (like a ceramic block) → Classified under Chapter 69 (Ceramics) or Chapter 82 (Tools).
- Note: This guide focuses on the chemical paste/liquid "Splash Preventer/Flux" commonly imported.
📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Chemical Nature |
|---|---|---|---|
3810.10.00.00 |
Pickling preparations; other flux preparations; other auxiliary preparations for soldering, brazing or welding | Most Common. Paste/liquid flux containing chlorides, borates, or acids to aid wetting and prevent oxidation/splashing. | ✅ Chemical (Flux) |
3813.00.00.00 |
Prepared fire-extinguishing charges and preparations; fire-protecting preparations | If the product is primarily a ceramic/silicate-based coating marketed as a "fire-proof" or "heat-resistant barrier" to prevent splatter. | ✅ Chemical (Fireproof) |
3402.90.00.00 |
Organic surface-active agents (prepared detergents & cleaning agents) | If the product is essentially a cleaning/pre-wash agent with minimal anti-spatter function. (Rare for brazing) | ❌ Incorrect for Brazing |
3906.90.00.00 |
Acrylic polymers in primary forms | If the anti-splash agent is a polymer film applied as a sheet (e.g., Kapton tape substitutes). | ✅ Physical Barrier |
🔍 Key Reminder:
- 90% of brazing splash pastes containing borax, boric acid, chlorides, or silica fall under3810.10.00.00.
- If the product is labeled as "Ceramic Paste" or "High-Temperature Barrier," customs may scrutinize it under3813.00.00.00.
- Do NOT classify under3824(Prepared binders) unless it is specifically a molding binder.
💰 III. 2026 Latest Tariff Rate Breakdown (Including Surcharges & Policy Add-ons)
✅ Applicable Country: United States (US)
✅ Country of Origin: China (CN)
✅ Effective Date: November 10, 2025 onwards (for subsequent imports)
🎯 1. 3810.10.00.00 —— Prepared Flux / Pickling Preparations for Brazing
| Item | Details |
|---|---|
| Basic Tariff Rate | 0% (General Ad Valorem) |
| USITC Surtax | +25% (Under USITC Footnote 9903.88.01 for Section 301 goods) |
| IEEPA Surtax | +10% (HSA/IEEPA surcharge on China-origin goods, effective Nov 2025) |
| Total Tariff Rate | 35% |
| Calculation Basis | CIF Value × 35% |
| De Minimis Exemption Eligible? | ❌ NO (deny_de_minimis applies) |
| Legal Basis Path | IEEPA:9903.01.25 → IEEPA:9903.01.24 → USITC:3810.10.00.00 → FOOTNOTE:9903.88.01 |
📌 Explanation:
- Although the base tariff is 0%, Section 301 (25%) and IEEPA (10%) apply strictly to chemical preparations from China.
- Total 35% is a significant cost factor.
- No de minimis exemption means even small shipments (under $800) are liable for full duties and documentation.
🎯 2. 3813.00.00.00 —— Fire-Protecting Preparations (Ceramic Paste)
| Item | Details |
|---|---|
| Basic Tariff Rate | 0% |
| USITC Surtax | +25% |
| IEEPA Surtax | +10% |
| Total Tariff Rate | 35% |
| Calculation Basis | CIF Value × 35% |
| De Minimis Exemption Eligible? | ❌ NO |
📌 Note:
- Even if classified as "fire-proof," the surtaxes remain the same.
- Misclassification from3810to3813does not save money.
🛠️ IV. Customs Clearance Practical Advice (Battle-Tested Pitfall Avoidance)
✅ 1. Required Documentation Checklist (Non-Negotiable)
| Document | Mandatory? | Description |
|---|---|---|
| ✅ Product Specification Sheet | ✔️ | Must list: Active ingredients (e.g., Boric Acid %, Chloride %), pH, Viscosity, Max Temp. |
| ✅ MSDS/SDS (Safety Data Sheet) | ✔️ | Crucial. Must comply with GHS. Identifies if it is flammable, corrosive, or hazardous. |
| ✅ Commercial Invoice | ✔️ | Clearly state: "Brazing Flux Paste / Anti-Splash Agent for Metal Joining." Avoid vague terms like "Chemical Paste." |
| ✅ Certificate of Origin (CO) | ✔️ | Required for IEEPA/Section 301 verification. |
| ✅ HAZMAT Declaration | ✔️ | If classified as dangerous goods (e.g., corrosive), provide DG declaration for air/sea freight. |
✅ 2. Declaration Tips (Critical Mnemonic)
🔥 "Be Transparent, Be Specific, Avoid 'General Chemical'!"
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Brazing Paste | 3810.10.00.00 "Prepared Flux for Brazing" |
"Adhesive" or "Glue" → 3506 (Higher scrutiny) |
| Ceramic Barrier | 3813.00.00.00 "Heat-Resistant Coating" |
"Paint" → 3208 (Different duty/risk) |
| Liquid Splash Guard | 3810.10.00.00 "Auxiliary Preparation for Soldering" |
"Cleaning Agent" → 3402 (Misclassification risk) |
| Solid Tapes | 3906.90.00.00 or 3919.10 |
"Chemical" → Chapter 38 (Wrong chapter) |
✅ 3. Special Cases Handling
| Situation | Handling Advice |
|---|---|
| Hazardous Chemicals | If SDS indicates "Corrosive" or "Flammable," ensure DG packaging (UN3265, etc.). Non-compliance leads to seizure. |
| OEM/Private Label | Ensure the supplier’s MSDS matches the declared ingredients. Customs may test for Brominated Flame Retardants (BFRs) or heavy metals. |
| Mixed Containers | Do not mix with cleaning solvents unless explicitly declared as a mixed chemical product. Keep separate shipments for clarity. |
| Small Samples | Even samples under $800 are not exempt from duty for China-origin goods under current IEEPA rules. File formally. |
🌍 V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff (China Origin) | Certification Required | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3810.10.00.00 |
35% (25% + 10%) | FDA (if food-contact adjacent), DOT (if DG) | High tariffs; strict SDS checks. |
| 🇨🇳 China | 3810.10.00.00 |
0% | GB/T Standards | Low duty, easy entry. |
| 🇪🇺 EU | 3810 10 00 |
0% | REACH Compliance | Must have EINECS/ELINCS numbers for ingredients. |
| 🇬🇧 UK | 3810 10 00 |
0% | UK REACH | Post-Brexit, requires UK-specific registration. |
| 🇯🇵 Japan | 3810.10.00 |
0% | JIS Standards | No surtaxes, but strict quality controls. |
📌 Conclusion:
- USA is the most expensive market due to叠加 surcharges.
- EU/UK require REACH registration – ensure your supplier has updated chemical registrations before shipping.
- China/EU/Japan have no additional anti-dumping or IEEPA surtaxes.
📌 VI. Common Errors & Pitfalls (Lessons Learned)
❌ Error 1: Declaring as "Glue" or "Adhesive" (3506)
👉 Consequence: Incorrect HS code → Potential 15-20% duty difference + Audit risk.
✅ Fix: Use "Prepared Flux" or "Auxiliary Preparation for Brazing."
❌ Error 2: Omitting SDS
👉 Consequence: Port detention, fines, or return shipment. Customs checks for hazardous properties.
✅ Fix: Always attach the latest GHS-compliant SDS.
❌ Error 3: Claiming "De Minimis" Exemption for Samples
👉 Consequence: Seizure of goods. China-origin chemicals are not exempt.
✅ Fix: File entry even for samples.
❌ Error 4: Vague Description "Metal Paste"
👉 Consequence: Customs exam officer may classify it as "Chemical Mixture" (3824) with different rules.
✅ Fix: Be specific: "Boron-based brazing flux paste, non-flammable."
🎯 VII. Conclusion: Professional Declaration for Cost & Compliance
🎯 Remember the Golden Rules:
🔹 "Flux is 3810, Base 0%, but Pay 35% in USA!"
🔹 "SDS is Mandatory, No DG, No Entry!"
🔹 "Don't Call it Glue, Call it Flux!"
📌 Pro Tip:
If your splash preventer contains halogenated compounds (e.g., chlorinated paraffins), check for RoHS/REACH restrictions in the EU/UK.
For US imports, consider duty drawback if you re-export the brazed parts.
📣 Immediate Action:
📞 Confirm HS Code with supplier’s SDS
📄 Ensure REACH registration for EU/UK shipments
🚀 Prepare for 35% tariff in US markets
✨ Precision in Classification Saves Money and Time!
💼 Your Chemical Product Deserves Accurate Declaration!
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.