• Door bottom seals - drop down type.
• Acoustically tested on proprietary fire doors.
• Aluminium body with self extinguishing PVC rubber coextruded seal and carrier.
• Sound reduction up to Rw 51dB*.
• Suitable for new and retrofit applications.
• Rebated fitting - comes with prefitted screws.
• Aluminium finish.
• Tested to 200,000 cycles.
• Smoke tested in accordance with BS EN 1634-3: 2004.

Astro ASDB Seal - Rebate Fit Version

• 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 rebated applications. Mounted into a 13mm x 28mm groove that has been morticed into the bottom edge of the door.
• 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.

Tested for durability 200,000 cycles completed without failure for fire rated doors.

Suitable for all types of wooden doors. 14mm maximum drop, Graduated Scissor action (seal drops on hinge side before lock side).

Smoke Testing was conducted to BS EN 1634-3: 2004 smoke control tests for door and shutter assemblies, openable windows and elements of building hardware - Part 3: Smoke control test for door and shutter assemblies.

Noise Reduction Index up to Rw 42 dB*

Min/Max Gap: 3mm - 13mm.

Maximum trimming:

• 50mm - 330mm
• 125mm - 430mm
• 150mm - 530mm to 1130mm.

Astro ASDBX DB Plus Seal

• 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 rebated applications. Mounted into a 15mm x 28mm groove that has been morticed into the bottom edge of the door.
• 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.

Tested for durability 200,000 cycles completed without failure for fire rated doors. 14mm maximum drop, Graduated Scissor action (seal drops on hinge side before lock side).

Seal easily removed to prevent damage during installation.

Smoke Testing was conducted to BS EN 1634-3: 2004 smoke control tests for door and shutter assemblies, openable windows and elements of building hardware - Part 3: Smoke control test for door and shutter assemblies.

Noise Reduction Index up to Rw 51dB* (DIN EN 20 140 -03)

Min/Max Gap: 3mm - 14mm.

Maximum trimming:

• 50mm - 330mm
• 135mm - 430mm
• 150mm - 530mm to 1230mm.

DB Seal Extension - Astro ASDBX/FBEXT & ASDBX/FBBOLT

• Available as POA only please please contact our Technical Department on 0113 2455450 (option 2) or send a message to [email protected] for details
• A unique solution to fitting rebated flush bolts in conjunction with drop down seals.
• The DB SEAL Extension works as an extender with the Astro DB Seal Plus drop down seal.
• 10mm maximum drop and the seal is manually lowered on the handle side.
• Also available are 150mm Stainless Steel Flush Bolts (AFASDBX/FBBOLT) with radiused ends designed to work with the DB Seal Extension.
• Suitable for double leaf timber doors.
• Acoustically tested on proprietary fire doors.
• Noise Reduction Index Rw 35dB.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.