Home > Companies > Lorient Polyproducts Ltd > LAS8005 si Drop Seal

A slimline, mortised automatic drop seal. It features 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.

Requires no power connection. Self-levelling on uneven floors; seal height can be adjusted independently of fixing screws. Can be fitted to aluminium doors by door fabricators.

Key benefits:

  • Tested for acoustic performance with BS EN ISO 10140-2: 2010.
  • Meets the smoke leakage performance requirements of BS 9999 when tested in accordance with BS 476: Pt.31.1: 1983.
  • Tested for reliability, the seal completed 1 000 000 cycles without failure.
  • Can be fitted to aluminium doors by door fabricators.

Standard product features


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

Use with:

Any perimeter seal.


35 mm high (excluding seal in dropped position) x 37 mm wide.

Minimum/ maximum gap size:

1 mm/ 13 mm.

Acoustic performance:

Weighted Sound Reduction Index (Rw): 33 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

LAS8005 si Drop Seal


[335 mm]
[435 mm]
[535 mm]
[635 mm]
[735 mm]
[835 mm]
[935 mm]
[1035 mm]
[1135 mm]
[1235 mm]


[Silver anodized aluminium with black end caps and black silicone rubber gasket]
[Silver anodized aluminium with grey end caps and grey silicone rubber gasket]

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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