SEKIUSI
S-LEC Film Division Digital Movie・Catalog



Soundproofing in buildings has become increasingly with the diversification of lifestyles and increased concerns for privacy. In 1996, SEKISUI successfully developed the S-LEC™ Sound Acoustic Film sound control interlayer film that dramatically increases sound insulation performance. This film has been well received for architectural use in housing, offices, schools, and commercial facilities.



Three layers made of ultra-thin sheets shut out sound.

S-LEC™ Sound Acoustic Film sound insulation interlayer film is achieved by the three-layer extrusion technology that produces a film consisting of a sound insulation layer (core layer) and two layers of standard interlayer film (external layers) that sandwich the core layer. With this technology, the sound insulation performance of the film is improved while it also maintains the basic performance of standard interlayer films.

Article:"Multi-Layer Technology for Noise Reduction"


【Sound Insulating】The loudest sound range is made quietest.

In human's most audible sound range from 1000 to 4000Hz, our Acoustic Film achieves 5dB of sound control effect that is higher than those of other normal interlayer films.



  • Differences in sound insulation performance 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 realizes sound reduction differences of over 5dB at most compared with standard laminated glass.