Product Overview
Polyurethane foam sealant is a single-component, moisture-curing expansive sealing material with semi-rigid characteristics, provided in aerosol cans. This flexible polyurethane foam is widely used for door/window installation, gap filling, sound/thermal insulation, waterproofing, and fireproofing applications. Its unique property lies in rapid reaction with atmospheric moisture, continuous post-application expansion, and exceptional adhesion strength to various substrates.
Advantages Over Traditional Sealants
Performance Comparison
| Feature | Traditional Cement/Putty | PU Foam |
| Thermal Insulation | Negligible | Reduces energy costs by 40%+ |
| Soundproofing | None | 60dB noise absorption |
| Water Resistance | Prone to leakage | Complete waterproof seal |
| Crack Resistance | Easily cracks | Flexible and crack-resistant |
| Installation Speed | Slow drying | Fast curing |
| Maintenance | Requires regular repair | Long-term maintenance-free |
| Total Cost | High recurring costs | One-time application saves costs |
Key Benefits
- Superior Thermal Insulation: Reduces building energy consumption by over 40%
- Excellent Soundproofing: Achieves 60dB noise absorption
- Durable Waterproof Seal: Complete moisture barrier
- Structural Reinforcement: Reduces door frame fasteners by 50%
- Seismic Resistance: Accommodates building movement
- Post-Processing Flexibility: Can be cut, sanded, and painted
Quality Standards for Premium PU Foam
Physical Specifications
- Optimal Density: 25-30kg/m³ (prevents shrinkage/deformation)
- Expansion Ratio: 40× original volume (750ml can fills 30 linear meters)
- Cell Structure: ≥70% closed cells
- Curing Time: Surface dry 8-10 mins, cuttable in 25-35 mins
- Fire Rating:
· B1: Flame-retardant (120-minute fire resistance)
· B3: Standard (30% cheaper)
Quality Identification
- Net weight ≥830g/can (inferior products often underfill)
- Third-party fire test reports required
- Uniform cured foam structure
- Stable expansion (premium products won't collapse)
Professional Installation Guide
Standard Procedure
- Equipment Setup
Secure applicator gun tightly
Check for leaks
Adjust pressure valve - Preparation
Shake can vigorously 20+ times
Clean application surface
Damp surfaces preferred (enhances curing) - Wall Application
Maintain 40-45cm spraying distance
Single layer ≤1.5cm thickness
Three-layer cross application recommended
No support needed for vertical surfaces - Ceiling Application
Keep gun vertical
Reduce distance to 15-20cm
Use spot-spray method
Storage & Maintenance
Storage Conditions
- Store upright at 5-35°C
- Avoid direct sunlight
- Use opened cans within 72 hours
Post-Processing
- Mandatory surface protection:
Exterior: Specialty sealant coating
Interior: Putty + paint
- UV Protection: Avoid prolonged exposure
- Access Ports: Reserve for pipe maintenance
Professional vs Consumer Grade
Professional-Grade Advantages
- Precise dispensing (20% material savings)
- Adjustable expansion (precision installations)
- Stable pressure (consistent quality)
- Interruptible application (reduces waste)
Straw-Type Applicators
- Small repairs
- Temporary sealing
- Budget projects
Pro Tip: Always use professional gun-grade products for critical applications like door/window installation. While 30% more expensive per can, they actually reduce total costs by 15% through material savings and efficiency.
Safety & Environmental Info
- CFC-free (ozone-friendly)
- Ensure ventilation during application
- Non-toxic when cured
- ROHS compliant
For technical datasheets or installation videos, please contact our engineering consultants.
