The SEALz® Concealed Drop Seal, or SCDS, is an Acoustic Seal designed for butt-hinged doors, providing an excellent barrier to airborne sound. The door dampens sound waves passing through the bottom of the door, reducing sound transmission into the room. This ensures that the acoustic attenuation provided by a doorset is close or equivalent to the wall or partition surrounding it.

The door seal is installed by inserting the seal into a slot at bottom of the door and fixed with anchoring steel bracket at both ends of the seal. The seal automatically raises and lowers when door is opened and closed by pressure against the door jamb.

In addition, it improves thermal insulation of the room by preventing heat transmission through the bottom of the door and also prevents airborne dust and insects from entering the room.