The 411ARL48 full mortise automatic door bottom seals the gap between door and threshold when the door closes. This drop-down seal system installs completely flush within the door mortise, maintaining clean aesthetics on decorative doors in upscale condos, hotels, and commercial buildings. Pemko designed this weatherization component to stop air infiltration and improve energy efficiency without affecting door appearance.
The aluminum mill casing houses a sponge neoprene seal that automatically lowers when the door contacts the frame. Works with both 1-3/4" and 1-3/8" thick doors. Installation hardware and end plates come included. The mortised design means no visible surface mounting hardware disrupts the door profile.
This door bottom helps maintain fire door assembly integrity where UL 10C testing requirements demand proper sealing during positive pressure fire tests. For broader building envelope weatherization context, see NFPA 101 requirements that often reference proper door sealing systems.
| Material | Anodized Aluminum Casing, Sponge Neoprene Seal |
|---|---|
| Length | 48 inches |
| Door Thickness | 1-3/4" and 1-3/8" |
| Mounting | Full Mortise |
| Warranty | 5 Years Limited |
Certified to UL 10C fire door assembly standards, UL 1784 air leakage testing, ANSI/BHMA A156.22 door gasketing systems, and ASTM E-283 air infiltration testing. GREENGUARD Gold certified for low chemical emissions.