The 434APKL32 is a full mortise automatic door bottom that creates an airtight seal under doors to block air infiltration, sound transmission, and moisture penetration. This weatherization component installs into the bottom rail of wood or metal doors and automatically drops a sealing bar when the door closes. Pemko designed this 32-inch unit to solve energy loss and environmental control issues in commercial buildings.
The low-force actuating mechanism extends a PemkoPrene seal bar that compresses against the floor when the door is in the closed position. The reversible design works on both left and right-hand doors. You can field-trim up to 2 inches for precise fitting. The anodized aluminum construction with mill finish provides corrosion resistance in high-traffic applications.
This door bottom helps maintain UL 10C fire door assembly integrity by sealing the gap that could compromise fire ratings. For comprehensive egress planning that includes proper door sealing, reference NFPA 101 Life Safety Code requirements for your occupancy type.
| Material | Anodized Aluminum and PemkoPrene |
|---|---|
| Length | 32 inches |
| Mounting | Full Mortise |
| Finish | Mill Aluminum |
| Warranty | 5 Years Limited |
This product meets UL 10C positive pressure fire testing, UL 1784 air leakage standards, ASTM E283 air infiltration requirements, and ANSI/BHMA A156.22 door gasketing specifications. GREENGUARD Gold certification confirms low chemical emissions for indoor air quality.