Acoustic Insulation 

Key Takeaways: 

  • Effective acoustic insulation depends on sealing all gaps and joints where sound could leak through.
  • Airborne noise (like voices or TV) and impact noise (like footsteps or furniture movement) require different insulation strategies.
  • FlexiFoam and the Expanding Foam range deliver high-performance sound dampening, airtightness, and thermal insulation.
  • Pro Gaps Fill & Paint provides the finishing touch for sealing small interior gaps and cracks that transmit sound. 

Increased Acoustic Comfort 

Your home should be a calm space, a break from the constant noise of daily life. But sound travels easily through walls, floors, and ceilings when gaps or weak points are left unsealed. That’s where acoustic insulation comes in. It works by absorbing and reducing sound transmission to create a quieter, more comfortable living environment. 

There are two main types of sound insulation: airborne and impact. Airborne sound includes voices, music, or TV noise that travels through the air, while impact sound results from physical contact, like footsteps, furniture movement, or slamming doors. 

To maintain consistent noise control, insulation alone isn’t enough, it’s crucial to properly seal every joint, cavity, or crack where sound can escape. FlexiFoam is designed for superior acoustic and thermal sealing, expanding to fill cavities while maintaining flexibility. The Pro Expanding Foam range (available in Click & Fix, Genius Gun, Aerosol, and Gun Grade formats) provides versatile solutions for different applications, offering durable, airtight seals that prevent sound leakage. 

For finishing interior details, Pro Gaps Fill & Paint is ideal for sealing fine cracks and joints before painting, helping to eliminate even the smallest sound pathways. Together, these Soudal products create an effective barrier that enhances indoor acoustic comfort, energy efficiency, and overall building performance. 

FAQs

What’s the difference between airborne and impact sound?

Airborne sound travels through the air (like voices or TV), while impact sound travels through solid materials (like footsteps or doors closing).

Which Soudal product is best for acoustic sealing around windows?

FlexiFoam provides an airtight, flexible seal ideal for perimeter insulation and acoustic sealing around frames.

Can expanding foam reduce sound transmission?

Yes, the Pro Expanding Foam range provides both thermal and acoustic insulation, helping block airborne and structural noise.

How do I seal small cracks or gaps inside a room?

Use Pro Gaps Fill & Paint for fine detailing. It’s paintable, easy to apply, and ideal for finishing interior joints and trims.