Door Material Guide – Choose the Right PU Adhesive
| Material | Recommended PU Adhesive | Key Preparation Steps |
|---|---|---|
| Solid Wood | SPC PU-125 (1K) | Sand to 120-grit, wipe clean |
| MDF/HDF | SPC PU-200 (1K) | Degrease, sand with 180-grit |
| Metal-clad | SPC PU-450 (2K) | Apply metal primer first |
| Fire-rated | SPC FR-2000 (Certified) | Follow manufacturer spec exactly |
Critical Tip: For exterior doors, always use weather-resistant 2K-PU formulas with UV protection.
Step-by-Step Application Guide
1. Surface Preparation
- Clean with isopropyl alcohol (≥99% purity)
- Sand mating surfaces (180-220 grit recommended)
- Remove all dust with vacuum and tack cloth
2. PU Adhesive Application
- Apply in continuous zigzag pattern (not dots)
- Ideal coverage:
- Panels: 150-200g/m²
- Joints: 3-4mm bead width
- Work within 20-minute open time
3. Clamping & Alignment
- Use 3-4 clamps per door
- Apply 0.5-1.5 kg/cm² pressure
- Check squareness with diagonal measurements
4. Curing Process
- Minimum cure times:
- Handling: 1-2 hours
- Full strength: 24-72 hours
- Maintain 18-25°C for optimal curing
Key Technical Specifications
| Parameter | 1K-PU Adhesive | 2K-PU Adhesive |
|---|---|---|
| Working Temperature | 5-35°C | -10-40°C |
| Full Cure Time | 24-48 hrs | 12-24 hrs |
| Tensile Strength | ≥3.5 MPa | ≥5.0 MPa |
| Elongation at Break | 80-120% | 60-90% |
Safety & Maintenance
- Storage: Keep sealed at 10-25°C
- Handling: Wear nitrile gloves and safety glasses
- Cleanup: Use acetone before cure, mechanical after
- Shelf Life: 6-12 months (check manufacturer date)
For fire-rated door applications, contact our technical team for certified solutions.
