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  Home > Fire Door Protection > Acoustic & Smoke Perimeter Seals

Automatic action door bottom seal : Smoke and acoustic rated.
Automatic action door bottom seal : Smoke and acoustic rated. Automatic action door bottom seal : Smoke and acoustic rated.

Surface Mount Automatic Acoustic & Smoke Rated Door Bottom Drop Seal 37db - 330mm - 1230mm

Key Points:

  • Suitable for wooden or metal door assemblies.
  • Automated drop-down action.
  • Acoustically* and smoke tested on proprietary fire doors
  • Aluminium body with self extinguishing PVC rubber co-extruded seal and carrier.
  • Sound reduction of up to Rw 37dB*
  • Suitable for new and retrofit applications
  • Screw fixing (screws supplied)
  • Silver Anodised finish
  • This seal is also available in a rebated version.

The Door Bottom Acoustic Seal & Smoke Seal Tested to 200,000 cycles.The ASDB/SM seal is an automatic door bottom seal which is spring loaded to lift clear of the floor as soon as the door leaf is opened by a few millimetres.

An acoustically designed seal for surface mounted applications. It is operated automatically by pressure against the door jamb on its plunger and seals when the door closes and retracts automatically when the door is opened.


Can be fitted on the internal side of the door using the frame to activate the plunger or externally using the bumper provided.Tested for durability 200,000 cycles completed without failure for fire rated smoke doors. 14mm maximum drop, Seal drops on hinge side before lock side. Suitable for all types of swing doors.


  • Min/Max Gap: 3mm-14mm.
  • Seal Lengths: 330mm, 430mm, 530mm, 630mm, 730mm, 830mm, 930mm, 1030mm, 1130mm, 1230mm.
  • Maximum trimming: 20mm - 330mm | 120mm - 430mm | 150mm - 530mm to 1230mm
  • * Quoted sound reduction rating will vary depending on the door density and any additional threshold & perimeter seals used in conjunction with this product - contact us for confirmation before specifying.

Seal Length

Our Price: £26.64

Prices include VAT.


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