Norseal NOR810 Drop Down Seal | Rebated
The Norseal NOR810 rebated drop seal for timber doors offers up to 20mm of gap coverage and self levelling operation.
Choose the length to suit your door using the drop down menu.
Read moreNorseal Norsound NOR810 Automatic Drop Seal
The Norseal NOR810 is a rebated automatic drop seal for the bottom edge of acoustic timber doorsets. It helps control smoke leakage, reduces sound transfer, and closes off the gap at the bottom of the door when it shuts.
The NOR810 door seal is smoke and acoustically tested to recognised standards for compliance.
Key Product Features:
- Norsound NOR810
- Rebated automatic drop seal
- Install in the bottom edge of acoustic timber doorsets
- For single action doors
- Available in a range of sizes
- Aluminium body with silicone gasket
- Mill finish with grey gasket
- Gap coverage: Up to 20mm
- Self levelling on uneven surfaces
- Compliant with BS 476-22
- Smoke tested to BS 476-31.1
- Acoustically tested in accordance with BS EN ISO 10140-2
- Certifire Approved CF629
- 35dB*
- UL Approval
- 1,000,000 cycle tested
- Up to 100mm cutback
- Body dimensions: 35mm x 14mm (select length)
*The decible rating that the NOR810 drop down seals can achieve depends on the door manufacturer's test evidence for each specific door.
Norseal 810 for Concealed Threshold Sealing
This acoustic seal installs into the bottom edge of the door, creating a clean, unobtrusive finish. It provides effective threshold sealing without the need for visible, surface mounted hardware.
The gap beneath a door allows sound transfer and smoke leakage. This rebated drop seal closes this gap with a concealed design that activates as the door shuts. The mechanism lowers on closing and lifts clear when the door opens. The self levelling function helps maintain even contact across the threshold, supporting consistent sealing on uneven floors.
Norsound 810 Seal for Acoustic and Smoke Control
This Norseal drop door seal is designed for timber doors where both sound reduction and smoke control are required. It has been acoustically tested to BS EN ISO 10140-2, smoke tested to BS 476-31.1, and is Certifire Approved. Check the fire test evidence for your specific door to confirm compatibility.
The Norsound 810 provides concealed installation, proven durability, and tested performance where it matters. The 1,000,000 cycle test confirms reliability on high use doors.
This level of testing makes the NOR810 drop seal a dependable choice for internal doors where noise control and compartmentation are both required. It suits a wide range of settings including offices, corridors, retail, hospitality, accommodation, healthcare, and education environments.
Norsound NOR810 Acoustic Seal Sizes and Cutback
NOR810 Norseal drop seals are available in a range of lengths to suit different door widths. They can be cut to size during installation to match the door width. The maximum cutback is up to 100mm, although this varies depending on the selected length.
Always check the datasheet and fitting instructions in the product documents to confirm allowable cutback before installation.
Where rebating the door is not suitable, the NOR820 provides a surface mounted option within the same range. You can also explore our wider range of fire door solutions, including fire door closers, hardware, and intumescent protection to support your door hardware and fire safety requirements.
