Pemko 434ARL36 Automatic Door Bottom 36 Inches Aluminum

Product Description

The PEMKO 434ARL36 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, the automatic mechanism deploys the sponge neoprene seal against the floor or threshold, blocking drafts, sound, dust, light, and moisture. When the door opens, the seal retracts to prevent wear and allow smooth door operation. Finished in mill finish aluminum, this unit measures 36 inches in length and suits standard 3-foot door applications. Installation is performed by door hardware specialists, general contractors, or experienced finish carpenters during new construction or door hardware retrofit work.

The 434ARL36 is suited for interior and exterior door applications in residential and commercial settings where a mortise-style door bottom is specified. A full mortise design means the unit is routed into the bottom of the door, providing a clean, recessed installation. The sponge neoprene seal delivers a compliant, compressible contact surface that conforms to minor threshold irregularities. This product is sold as a single unit and fits a 36-inch door leaf.

Key Features

• Full mortise automatic mechanism deploys seal on door close and retracts on door open
• Sponge neoprene seal provides a compressible, weather-resistant contact surface
• Mill finish aluminum housing offers corrosion resistance and a neutral architectural appearance
• 36-inch length sized for standard 3-foot door applications
• Mortise installation keeps hardware recessed and flush with door bottom edge

Compatibility

Designed as an OEM-style mortise automatic door bottom replacement or new-installation component for standard 36-inch commercial and residential door leafs requiring a recessed automatic seal.

Installation Notes

Installation of a full mortise door bottom requires routing a precise mortise into the bottom rail of the door and is typically performed by a door hardware installer or skilled carpenter. Confirm door bottom rail depth is sufficient to accept the unit dimensions before routing. Disconnect or lock out any electrified door hardware on the door before beginning work. Follow applicable building codes and manufacturer instructions for fastener placement and seal adjustment.