Due to an increasing world population and growing infrastructures, more and more architects find themselves working on plans for buildings next to busy roads, near airports, or in the cities with high levels of traffic. This means extra thought must go into building design to adhere to regulations on noise levels and maintain the quality of peoples' lives. Sekisui has successfully developed S-LEC™ Sound Acoustic Film that dramatically increases sound insulation performance, protecting people from the noise of the outside world for higher levels of comfort. This film has been well received for architectural use in housing, offices, schools, and commercial facilities.


Three layered technology that collectively absorbs unwanted noise

S-LEC™ Sound Acoustic Film technology outperforms standard laminated glass performance in the audible range.

S-LEC™ Sound Acoustic Film is constructed from a patented three-layer extrusion technology. The outer layers provide mechanical strength and enable adhesion to the glass. The inner layer absorbs unwanted sound frequencies. With this technology, the sound insulation performance is improved, and still maintains the functionality of standard interlayer film.


S-LEC™ Sound Acoustic Film, with its special resin core, delivers significantly better sound attenuation than standard PVB film. Unwanted audible sound and noise disturbances are located in the 1,000 to 4,000 Hz range. The decrease in noise is greatest in the frequency range where windows easily resonate: around 2000 Hz. S-Lec™ Sound Acoustic Film improves sound transmission loss of these noises by 10dB compared to standard PVB interlayer film.

S-Lec™ Sound Acoustic Film used in creative applications:

  • In the glass roof of a football stadium to limit the noise from raindrops.
  • In a glass wall by the highway, instead of a traditional concrete wall to block out noise.
  • In contemporary buildings to create quieter, ambient environments.

Acoustic Technologies Outperforming Standard Product in Audible Range

S-Lec Sound Acoustic Film technologies outperform standard laminated glass performance in audible range.
  • Differences in sound insulation performance are most pronounced for sounds in the range of 1,000 to 4,000Hz to which the human ear is most sensitive.
  • S-LEC™ Sound Acoustic Film attains sound reduction of 10dB compared with normal laminated glass.