Sealing doorstep FT / DF939

Sealing doorstep FT for metal doors with high quality fire resistant silicone. Installed using screws to the bottom of the door. Designed for passageways where a flat floor is necessary, such as hospitals. The automatic sealing doorstep works using a knob that activates when opening and closing the door. The sealing doorstep will quickly and silently drop down to the floor, adjusting for uniformity, when the door closes. The doorstep will rise when the door is opened, therefore not scratching the floor.