Pemko 411APKL36 Full Mortise Automatic Door Bottom 36 in

Product Description

The PEMKO 411APKL36 is a full mortise automatic door bottom designed to seal the gap between the door face and threshold when the door closes. As the door contacts the strike, the internal drop mechanism deploys the PemkoPrene seal downward to create a continuous weather, air, and sound barrier along the full door width. When the door opens, the seal retracts automatically. The unit ships in a mill finish aluminum housing sized for 36-inch door applications. Installation is performed by a door hardware installer or carpenter during new construction or retrofit work.

Full mortise automatic door bottoms are used in residential and commercial applications where a flush, concealed installation is required. Mortise-style units are routed into the bottom rail of the door, leaving the face flush with the door surface. This model is suited for wood and hollow metal doors where bottom-of-door sealing is needed for weatherstripping, draft control, sound attenuation, or smoke and air infiltration management. The PemkoPrene seal material provides durable, compressible contact with the threshold or floor surface.

Key Features

• Full mortise design installs flush into the bottom rail of the door for a clean, concealed appearance
• Automatic drop mechanism deploys seal on door close and retracts on door open
• PemkoPrene seal provides compressible, resilient contact for weatherstripping and draft control
• Mill finish aluminum housing resists corrosion and suits standard commercial door finishes
• 36-inch length fits standard single-door applications

Compatibility

Designed as an OEM-style replacement or new-installation automatic door bottom for full mortise applications in standard 36-inch residential and commercial doors.

Installation Notes

Installation requires routing a precise mortise pocket into the bottom rail of the door to accept the housing. A licensed door hardware installer or experienced carpenter should perform the mortise cut and fitting. Verify door bottom rail thickness before installation to confirm adequate material depth for the mortise. Adjust the drop mechanism per the manufacturer instructions to achieve proper seal contact without excessive drag on the threshold.