Pemko 4301DPKL36 Automatic Door Bottom 36 Inch Dark Bronze

Product Description

The PEMKO 4301DPKL36 is an automatic door bottom designed to create a continuous seal along the bottom of a door when it closes. As the door swings shut, the mechanism drops the seal element into contact with the threshold or floor, then retracts it when the door opens to prevent drag. The housing is dark bronze anodized aluminum, and the sealing element is PemkoPrene, a durable synthetic gasketing material. This unit measures 36 inches in length and fits standard 3-foot door applications. It is installed by finish carpenters, door hardware specialists, or commercial glaziers working on hollow metal or wood door assemblies.

Automatic door bottoms are used in both residential and commercial applications where weatherstripping, sound attenuation, smoke control, or energy efficiency is required. This model is well suited for interior and exterior door installations where a clean, finished appearance is needed alongside reliable sealing performance. The dark bronze anodized aluminum finish is commonly specified in commercial projects to coordinate with door hardware and frame finishes.

Key Features

• Automatic drop-and-retract mechanism seals the door bottom on closure without floor drag during swing
• PemkoPrene sealing element provides durable contact with threshold or floor surface
• Dark bronze anodized aluminum housing offers corrosion resistance and a finished commercial appearance
• 36-inch length suits standard 3-foot door widths
• Sold individually as a single unit ready for installation

Compatibility

Designed as an OEM-style replacement or new-installation door bottom for standard 36-inch commercial and residential door assemblies requiring an automatic sealing mechanism at the door base.

Installation Notes

Installation is typically performed by a finish carpenter or door hardware technician. The door bottom is mortised or surface-mounted to the door face or bottom rail according to the door construction type. Ensure the door is fully hung and hardware is set before adjusting the drop height of the seal element. Follow applicable building codes and project specifications when installing on fire-rated or smoke-rated door assemblies, as additional labeling requirements may apply.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.