Foam Filler for Doors and Windows
Foam fillers are commonly used in construction to seal gaps around doors and windows, improve insulation, and prevent air, dust, noise, and moisture penetration. When applied correctly, PU foam fillers provide secure fixing, airtight sealing, and long-lasting performance for both interior and exterior installations.
Applications of Foam Filler in Doors and Windows
Foam fillers are mainly used during installation and finishing works.
- Sealing gaps between frames and walls
- Fixing door and window frames in position
- Improving thermal and acoustic insulation
- Preventing air and water leakage
Key Properties Required for Door & Window Foam
Not all foams are suitable for frames and openings.
- Controlled or low expansion to avoid frame distortion
- Strong adhesion to concrete, brick, wood, aluminium, and PVC
- Good insulation and airtight sealing
- Durability in internal and external conditions
Companies Name
- Palco
- Soudal
- Sika
- Fosroc
- Bostik
1. Palco PU Foam
Palco PU Foam is widely used for sealing and fixing doors and windows.
- Excellent adhesion to common construction substrates
- Controlled expansion suitable for frames
- Provides thermal and sound insulation
- Easy to trim and finish after curing
2. Soudal PU Foam for Doors & Windows
Soudal foams are designed for professional frame installation.
- Stable expansion and reliable filling
- Good insulation performance
- Suitable for internal and external use
3. Sika Boom PU Foam
Sika Boom is commonly used for gap filling around frames.
- Uniform cell structure
- Good adhesion and sealing ability
- Helps reduce air leakage
4. Fosroc PU Expanding Foam
Fosroc PU foam is used for sealing and filling construction openings.
- Consistent expansion
- Suitable for doors, windows, and service gaps
- Improves airtightness and insulation
5. Bostik PU Foam
Bostik PU Foam is a trusted solution for professional installations.
- Strong bonding and gap filling
- Good thermal and acoustic insulation
- Suitable for frame perimeter sealing
Common Site Mistakes to Avoid
Improper application can cause long-term issues.
- Overfilling gaps causing frame distortion
- Applying foam on dusty or dry surfaces
- Using high-expansion foam for delicate frames
Frequently Asked Questions (FAQ)
1. Which foam is best for doors and windows?
Low or controlled expansion PU foam is best for frames.
2. Can PU foam be used outdoors?
Yes, once cured and protected, it is suitable for exterior use.
3. Does foam help in insulation?
Yes, it improves thermal and sound insulation.
4. Can cured foam be cut and painted?
Yes, after full curing it can be trimmed and painted.
5. Is PU foam structural?
No, it is used for sealing and fixing, not load bearing.
Raltro
Raltro is a construction knowledge platform focused on correct site practices and material selection. By explaining how foam fillers are used for doors and windows, Raltro helps contractors and installers choose the right products to achieve proper sealing, insulation, and long-lasting frame performance.