Drop down door seals restrict the passage of noise, smoke and air underneath timber and glass doors. They can be surface mounted or integrated with the door. When a door closes, they drop automatically to create a seal.

Fire Doors
In the event of a fire, intumescent strips will seal the gaps around the perimeter of the door set on three edges between the frame and the door.


A gap of up to 10mm is permissible underneath a fire door. However, if Building Regulations specify that smoke protection is required, then the maximum gap underneath the door reduces to 3mm. In this case, a drop down seal may be required to maintain the integrity of the fire door.

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  • Harmony Integral Dropdown Seal

    Harmony Acoustic Integral Drop Down Door Seal

    From £16.99 (ex vat)
  • Surface Mounted Drop Down Seal

    Harmony Acoustic Surface Mounted Drop Down Door Seal

    From £17.99 (ex vat)
  • Drop Down Seal for glass

    G2G Drop Down Seal for Glass Doors

    From £27.12 (ex vat)