Polyurethane Foam Sealant - High-Performance Building Insulation and Sealing Solution

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

Key Benefits

1. Superior Thermal Insulation: Reduces building energy consumption by over 40%
2. Excellent Soundproofing: Achieves 60dB noise absorption
3. Durable Waterproof Seal: Complete moisture barrier
4. Structural Reinforcement: Reduces door frame fasteners by 50%
5. Seismic Resistance: Accommodates building movement
6. 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

1. Net weight ≥830g/can (inferior products often underfill)
2. Third-party fire test reports required
3. Uniform cured foam structure
4. Stable expansion (premium products won't collapse)

Professional Installation Guide

Standard Procedure

1. Equipment Setup
   Secure applicator gun tightly
   Check for leaks
   Adjust pressure valve
   
   
2. Preparation
   Shake can vigorously 20+ times
   Clean application surface
   Damp surfaces preferred (enhances curing)
   
   
3. Wall Application
   Maintain 40-45cm spraying distance
   Single layer ≤1.5cm thickness
   Three-layer cross application recommended
   No support needed for vertical surfaces
   
   
4. 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

1. Mandatory surface protection:
   

   Exterior: Specialty sealant coating

   Interior: Putty + paint

   
   
2. UV Protection: Avoid prolonged exposure
3. Access Ports: Reserve for pipe maintenance

Professional vs Consumer Grade

Professional-Grade Advantages

1. Precise dispensing (20% material savings)
2. Adjustable expansion (precision installations)
3. Stable pressure (consistent quality)
4. 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.