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Pemko 420APKL Hollow Metal Automatic Door Bottom | PemkoPrene Insert
The Pemko 420APKL Hollow Metal Automatic Door Bottom is a precision-engineered sealing solution specifically designed for integration into hollow metal doors. Optimized for doors featuring a 13/16" inverted bottom channel, this heavy-duty drop seal provides a completely concealed installation. By mounting inside the door's existing structure, it eliminates the need for external end plates, maintaining the clean, architectural lines of commercial offices, dormitories, and high-traffic institutional buildings.
Equipped with a set of fire-rated double PemkoPrene seals, the 420 Series creates a formidable barrier against air, dust, moisture, and sound. Its specialized smoother action positive seal mechanism ensures that the seal only drops when the door is fully closed, preventing unnecessary wear and ensuring your door operates with minimal resistance.
Key Features & Performance
- Specialized Hollow Metal Fit: Custom-engineered to seat perfectly within a 13/16" inverted channel, providing a flush, professional finish.
- Dual PemkoPrene™ Seals: Features fire-rated, rubber-like thermoplastic gaskets that offer the high flexibility of natural rubber with enhanced resistance to cleaning fluids and disinfectants.
- Hinge-Side Plunger Actuation: The drop-bar is triggered by a jamb-contacting plunger (requires a pre-drilled hole in the door edge), ensuring a consistent, level seal across the threshold.
- Protection Against the Elements: Designed to fill gaps up to 1/2" (3/8" gap recommended), effectively blocking drafts, insects, light leaks, and fumes.
- Field Adjustable: Supplied at NET length and can be trimmed by up to 2" in the field to accommodate precise on-site door dimensions.
Technical Details & Certifications
- Base Material: High-strength Mill Finish Aluminum Casing.
- Dimensions: 1 3/8" Width x 13/16" Overall Height.
- Fasteners: Includes thru bolts and #6 x 5/8" PHSMS for a secure, permanent internal mount.
- UL 10C Fire Rated: Certified for Positive Pressure Fire Tests, essential for code-compliant fire door assemblies.
- UL 1784 Smoke Inspected: Meets rigorous standards for air leakage and smoke containment in life-safety applications.
- Acoustic Rating: Tested to ASTM E 90-2009 to ensure significant reduction in sound transmission.
- Environmental Safety: GREENGUARD Gold Certified for low chemical emissions, supporting healthy indoor air quality.
- Industry Standards: Compliant with ANSI/BHMA A156.22 and ASTM E-283-04 for architectural gasketing systems.
| Length | 36 Inch or 42 Inch or 48 Inch |
| Brand | Pemko |
| Insert Material | PemkoPrene |
| 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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