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High Performance DS Acoustic, Smoke and Fire Seal

High Performance DS Acoustic, Smoke and Fire Seal

Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

  • Certifire Certificate

    Certifire Certificate

    Certificate type

Lorient Polyproducts Ltd

Twin fin seal - elastomeric fins at both ends of the seal.

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+44 (0)1626 834252 www.lorientuk.com

Three seals in one - Lorient's complete solution for acoustic, smoke, fire and thermal containment, and accessibility, to meet the requirements of Approved Documents B, E and M.

With elastomeric fins on both edges of the seal, the DS is designed to ensure continuous sealing at ironmongery points - essential for effective smoke and acoustic containment. The DS is supplied with black fins, and is available in a range of standard colours - to blend or contrast with surroundings as required.

Proven acoustic performance of 31 dB Rw (when tested in accordance with BS EN ISO 140-3: 1995, on a typical fire rated door construction, installed with LAS8001 si automatic threshold seal). Please refer to the door manufacturers’ fire test evidence to select the correct seal size and combination.

Four different seals available:

10 x 4 mm Ref: LP1004DS:

Can provide up to 30 minutes fire resistance. Two parallel seals (in separate grooves) can provide 60 minutes fire resistance in hardwood constructions.

15 x 4 mm Ref: LP1504DS:

Designed for softwood constructions or where the gap between the door and the frame is greater than usual.

20 x 4 mm Ref: LP2004DS:

Can provide 60 minutes fire resistance and can be notched to fit around hinges.

25 x 4 mm Ref: LP2504DS:

These large seals can help control door distortion.

The DS profile is supplied with black fins.

General information

Uniclass 2015

Pr_35_90_33_22 Door and window weatherstrips and sealsPrimary


L20/20 Wood flush doors

L20/230 Wood flush doors

L20/25 Wood panelled doors

L20/250 Wood panelled doors

L20/270 Wood doors

L20/280 Doors

L20/30 Wood doors

L20/310 Wood door frames

L20/330 Wood door frames

L20/370 Door frames

L20/410 Wood doorsets

L20/420 Wood doorsets

L20/430 Wood doorsets

L20/480 Doorsets

L20/50 Wood door frames

L20/52 Wood door frames

L20/55 Doorsets

P21/860 Door seals for

Specification data - Door and window weatherstrips and seals

Product Reference

High Performance DS Acoustic, Smoke and Fire Seal Ref: LP1004DS

10 x 4 mm.

High Performance DS Acoustic, Smoke and Fire Seal Ref: LP1504DS

15 x 4 mm.

High Performance DS Acoustic, Smoke and Fire Seal Ref: LP2004DS

20 x 4 mm.

High Performance DS Acoustic, Smoke and Fire Seal Ref: LP2504DS

25 x 4 mm.


1000 mm

2100 mm



Standard range





Dark brown



Light brown





Superluxe Woodgrain finish

American black walnut

American cherry

American sycamore

American white oak



European walnut

Limed oak

Medium oak



Superluxe metallic finishes

Bright polished chrome

Satin anodized aluminium

Satin stainless steel

Standard product features

Acoustic performance (standard architectural solid core door):

  • Weighted Sound Reduction (Rw): 31 dB.
  • Sound Transmission Class (STC): 31 dB.

Product Options


Other lengths are available to special order. Lorient can also produce fire seals ranging from 10–70 mm wide and from 2.5–15 mm deep.

Third party certifications

Additional certifications:

  • CF330/CF341
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