web analytics

Door Drop Down Seal

Door Drop Down Seal

Drop Down Seals or threshold seals are designed to work in conjunction with a perimeter seal and where practical a threshold plate. With acoustics, unlike fire and smoke sealing it is essential you seal the threshold of a door as sound will make its way through any crevice available. This automatic drop down seal is light weight with a self-levelling mechanism. This seal has passed a 100,000 cycle test with ease.

The acoustic door seal is adjustable to suit the gap size needed and will not only act as an acoustic barrier but also help keep out drafts and keep in energy!


  • 500,000 cycles tested
  • Lightweight operation
  • Protects against smoke
  • Self-levelling
  • Unobtrusive
  • Sizes from 335mm up to 1535mm
  • 17 mm drop

Use in the following applications

  • Single / Double Action Doorsets
  • Single Action Doorsets




What is the maximum door bottom gap?
The automatic drop seal will extend to a maximum of 15mm.
What size rout do I need to provide for?
14mm wide by 35mm deep
How do I adjust the drop length?
The black actuator button also acts as an adjusting rod, simply pull the button away from the unit and twist it a full 180degree;. Anti-clockwise to lengthen and clockwise to shorten, repeat until desired drop level is reached
What length is the seal?
835mm. The seal can be cut back 150mm to fit doors from 685mm to 835mm.

Scroll to Top

Request a Callback

Fill in your details and we’ll get back to you asap.