Home > Companies > Lorient Polyproducts Ltd > LAS8040 si Drop Seal

A medium duty automatic threshold (door bottom) seal with a high efficiency mechanism.

Key Benefits:

  • The seal is lifted clear of the floor as soon as the door is opened by a few millimetres - resulting in exceptionally low door operating forces.
  • Acoustically tested in accordance with BS EN ISO 10140-1: 2010 +A1: 2012.
  • The unique double activated mechanism has an adjustable brass striker button at the hinge side and a nylon striker at the latch side.
  • The mechanism also contains additional internal seals and a double compression facility to provide exceptional acoustic performance.

Standard product features


  • Single swing doors. For use on both right and left handed doors.
  • Use with any perimeter seal.


30 mm high (excluding seal in dropped position) x 20 mm wide.

Seal material:

Flexible thermoplastic elastomer gasket and internal fins.


Silver aluminium with black flexible insert.

Minimum/ maximum gap size:

1 mm/ 14 mm.

Acoustic performance:

Weighted Sound Reduction Index (Rw): 32 dB.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-75-40/430 Door and window weatherstrips and seals

Product specification

An important note about specifying



Lorient Polyproducts Ltd


+44 (0)1626 834252

Product reference

LAS8040 si Drop Seal



Manufacturer details

Endeavour House,
Fairfax Road,
Heathfield Industrial Estate,
Newton Abbot,
Devon, TQ12 6UD
Tel +44 (0)1626 834252
Fax +44 (0)1626 833166
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