Polyurethane foam sealant, a seemingly ordinary single-component moisture-curing material, has become indispensable in construction and renovation due to its exceptional filling and sealing properties. However, in international shipping, it transforms into a "hazardous material" requiring special handling. Classified as a Class 2.1 dangerous good with the UN code UN1950, this flammable product presents unique shipping challenges when pressure-packed in aluminum containers.
I. Essential Information for Shipping Polyurethane Sealant
To successfully export polyurethane sealant, understanding its regulatory profile is crucial:
- IMDG Code: The international rulebook for maritime dangerous goods transport
- Proper Shipping Name (English): GAP FILLER (ADHESIVE)
- Primary Hazard Class: 2.1 (flammable gases)
- Emergency Codes: F-D; S-U (critical for safety protocols)
- Packaging Group: Not applicable
- Marine Pollutant: No
II. Step-by-Step Shipping Process
The export procedure becomes manageable when broken into key phases:
1. Booking:
- Required Documents: Booking request form, updated MSDS (Material Safety Data Sheet), and dangerous goods packaging certificate (or limited quantity exemption)
- Critical Note: The MSDS must contain all 16 standard sections, and the packaging certificate remains non-negotiable for transport authorization
2. Loading:
- Two Methods: Direct haulage (factory-to-port) or container stuffing at certified dangerous goods warehouses
- Safety Requirement: Mandatory use of approved hazardous materials transport vehicles and facilities
3. Maritime Declaration:
- Timing: Must complete before the shipping agent's declaration deadline
- Process: Online pre-approval followed by submission of original documents
4. Customs Clearance:
- Key Factor: Align declarations with port schedules to prevent delays
5. Port Entry:
- Special Handling: Class 2.1 goods typically require direct shipside loading (vessel-to-truck transfer)
- Complex Scenario: At customs-controlled ports like Yangshan, clearance must precede port entry, while loading plans often emerge mere hours before vessel arrival - requiring precise coordination between customs release and port scheduling
III. Mandatory Documentation
Successful clearance demands these essential documents:
- English MSDS: Complete 16-section safety documentation
- Dangerous Goods Packaging Certificate: Includes performance test results and usage authorization. Limited quantity declarations may substitute for small carton-packed goods
- DG Form: Standardized dangerous goods application for carrier review
- Declaration Documents: Authorization letter/original packaging certificate (or limited quantity proof)/English MSDS/packing list
- Customs Documents: Packing list, commercial invoice, sales contract, customs declaration form, and detailed product specifications. No export license or commodity inspection required
IV. Common Compliance Pitfalls
- Packaging: Typically shipped in manual-load cartons without pallets
- Warehousing: Few Shanghai port facilities handle manual-load Class 2.1 goods, requiring verified operator expertise
- Limited Quantity Declarations: Accuracy in exemption applications proves critical when lacking full packaging certification
While polyurethane foam sealant shipping presents regulatory complexities, proper preparation and professional logistics partnerships ensure safe, efficient international transport. Understanding these protocols transforms a potentially daunting process into a manageable operational routine.