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Pemko 411ARL Full Mortised Automatic Door Bottom - Black Sponge Neoprene
The Pemko 411ARL is an architectural-grade concealed automatic door bottom (ADB) engineered to provide a high-performance seal at the base of the door. Designed for full mortise installation, this unit is completely invisible when the door is open, making it the ideal hardware for luxury hotels, upscale condos, and decorative commercial doors. It features a sophisticated drop-bar mechanism that lowers a durable Black Sponge Neoprene (R) insert only when the door is closed, effectively blocking out sound, smoke, drafts, and light.
High-Performance & Life Safety Features
- Concealed "Sealed-in-Place" Design: The aluminum mill casing is fully mortised into the bottom rail of the door, preserving the clean architectural lines of the door while providing a laboratory-tested seal.
- Fire and Smoke Certified: Fully compliant with UL 10C for positive pressure and UL 1784 for air leakage, ensuring your facility meets strict commercial fire codes and smoke containment standards.
- Superior Sound and Air Barrier: Tested to ASTM E90 for acoustic attenuation and ASTM E-283 for low air infiltration, significantly improving interior comfort and energy efficiency.
- Durable Sponge Neoprene (R) Insert: The black neoprene seal is flexible at high and low temperatures and resists deterioration from oils or cleaning chemicals, providing a long-lasting, slightly compressible seal for gaps up to 3/4".
- Frictionless Hinge-Side Actuation: The jamb-contacting plunger ensures the seal drops only at the final moment of closure, preventing seal skidding and floor wear while keeping opening force low for ADA compliance.
Technical Specifications
- Manufacturer: Pemko (ASSA ABLOY)
- Model: 411ARL (Mill Finish Aluminum)
- Mounting: Full Mortise; Non-handed (simply flip to change handing).
- Dimensions: 9/16" Width | 1-3/8" Overall Height.
- Door Compatibility: Standard for 1-3/4" doors (specify K411 kit for 1-3/8" doors).
- Fasteners: Supplied with #6 x 5/8" FHSMS (Flat Head Sheet Metal Screws) and end plates.
- Certifications: BHMA Certified, GREENGUARD Gold, and Positive Pressure Rated.
Pro-Tip for High-End Door Preparation
The Pemko 411ARL is the gold standard for acoustic privacy in dormitories and professional offices. Because it is hidden within the door, it provides a clean, symmetrical square-shaped case design that allows for even flush mounting. For the best results, ensure the plunger is adjusted so the drop bar meets the floor or threshold simultaneously across the entire width of the door.
| Length | 36 Inch or 42 Inch or 48 Inch or 32 Inch |
| Brand | Pemko |
| Insert Material | Neoprene |
| Fire Rated | Fire Rated |
| Mounting Type | Full Mortise |
| Bottom Weatherseal Type | Automatic Door Bottom |
| Housing Finish | Aluminum |
| Sweeps, Door Bottom or Rain Drip | Door Bottom |
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