Astrodraft Draught Proofing Supplies


Acoustic & Smoke Rated Door Bottom Seal

Trade Names: ASTRO ASDB/SM Seal


Surface Mounted door bottom seal - drop down type.

Suitable for wooden or metal door assemblies.

Acoustically and smoke tested on proprietary fire doors

Aluminium body with self extinguishing PVC rubber coextruded seal and carrier.

Sound reduction of Rw 33* decibels

Suitable for new and retrofit

Screw fixing (screws suppied)

Anodised satin clear finish

Tested to 200,000 cycles.

Door Bottom Face Mounted Acoustic Seal


Door bottom seal - surface mount type.ASTRO ASDB/SM SEAL is a 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 face mounted applications. It is operated automatically by pressure against the door jamb on its adjustment block and seals when the door closes and retracts automatically when the door is opened.

Can be fitted inside (lock side using bumper provided) or outside of the door (non lock side)

Click here for the rebated door bottom seal version (for timber only doors).


Approved Document ESymbol Guide Approved Document M

Tested for durability 200,000 cycles completed without failure for fire rated smoke doors.Surface mount door bottom seal

14mm maximum drop, Seal drops on hinge side before lock side.

Suitable for all types of swing doors.

Noise Reduction Index: up to Rw 33 dB*

* 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.

Min/Max Gap: 3mm - 14mm.

Seal Lengths:
330mm, 430mm, 530mm, 630mm, 730mm, 830mm, 930mm, 1030mm, 1130mm, 1230mm.
Maximum trimming length 150mm.

Finish: Anodised Satin Clear.

To order & specify


Typical wording

Test and Assessment Reports

Seals have been tested without threshold plates and also straight down to carpet.

For additional testing, or technical information please contact Astroflame.




Please refer to the installation sheet that comes with the product


As part of our policy of ongoing improvements, we reserve the right to modify, alter or change product specifications without giving notice. Product illustrations are representations only. All information contained in this document is provided for guidance only, and as ASTROFLAME FIRESEALS LTD has no control over the installation methods of the products, or of the prevailing site conditions, no warranties expressed or implied are intended to be given as to the actual performance of the products mentioned or referred to, and no liability whatsoever will be accepted for any loss, damage or injury arising from the use of the information given of products mentioned or referred to herein.

The above information to the best of our knowledge is true and accurate and based upon current test data and is supplied for your guidance only. Customers should satisfy themselves to the suitability of the product in its intended use and no guarantee is given or implied since the conditions of actual use are beyond our control. ASTROflame (Fireseals) Ltd, disclaim any liability for loss, damage or other expense arising from the use of information, data or products mentioned or referred to and reserve the right to change any details or specifications without notice.


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