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LAS8008 si is a face-fixed or semi-mortised automatic threshold (door bottom) seal with a high efficiency mechanism which lifts the seal clear of the floor as soon as the door is opened by a few millimetres; resulting in lower door operating forces. LAS8008 si with a curved cover plate for enhanced aesthetics: surface mounted only.

Key benefits

  • It requires no power connection.
  • Surface mounted application suitable for upgrading existing doors.
  • Durable flexible elastomeric fin elements are incorporated with the housing to provide acoustic and smoke properties.
  • Tested for reliability, the seal completed 1,000,000 cycles without failure.
  • Tested for acoustic performance with BS EN ISO 10140-2: 2010.
  • Tested for up to 60 minutes under conditions of BS 476: Pt.20/22: 1987 without compromising fire resistance; also tested under conditions of BS EN 1634-1:2008.
  • Also meets the smoke leakage performance requirements of BS 9999 when tested in accordance with BS 476 Pt 31.1 and AS 1530.7.


  • Single swing doors.
  • For use on both right and left handed doors.

Use with

  • Any perimeter seal.
  • Any threshold plate.


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