Pemko 411ARL36 Full Mortise Automatic Door Bottom 36 in

Product Description

The PEMKO 411ARL36 is a full mortise automatic door bottom designed to seal the gap between the bottom of a door and the threshold when the door closes. As the door closes, the internal mechanism drops the sponge neoprene seal into contact with the floor surface, then retracts it automatically when the door opens. This action prevents air infiltration, drafts, dust, and sound from passing beneath the door. The unit is finished in mill finish aluminum and sized at 36 inches for standard door widths. It is typically installed by finish carpenters, door hardware specialists, or commercial contractors working on interior or exterior door assemblies in residential and commercial applications.

The 411ARL36 is suited for use on commercial or residential doors requiring a mortised installation where the door bottom mechanism is recessed into the bottom rail of the door. Typical applications include office entry doors, corridor doors, hotel guestroom doors, and residential exterior doors where weather sealing, draft control, or acoustic attenuation is a priority. The sponge neoprene seal provides a compliant, compressible contact surface that accommodates minor floor irregularities.

Key Features

• Full mortise design installs recessed into the door bottom rail for a clean, low-profile appearance
• Automatic drop-and-retract mechanism activates on door close and retracts on door open
• Sponge neoprene seal provides compressible, draft-resistant contact with the floor surface
• Mill finish aluminum housing resists corrosion in typical interior and light exterior environments
• 36 inch length fits standard commercial and residential door widths

Compatibility

Designed as an OEM-style replacement or new-installation door bottom for full mortise door applications requiring an automatic seal mechanism in a 36 inch door width configuration.

Installation Notes

Installation requires routing a mortise pocket into the bottom rail of the door to recess the housing flush with the door face. A licensed door hardware installer or experienced finish carpenter should perform the mortising and fitting work. Verify door bottom rail thickness is sufficient to accept the housing depth before cutting. Follow applicable building codes and manufacturer instructions for mounting hardware torque and seal adjustment.