Description
Pemko 434APKL Full Mortise Automatic Door Bottom – PemkoPrene Insert
The Pemko 434APKL Auto Door Bottom with PemkoPrene Insert provides superior sealing for doors, blocking drafts, light, sound, smoke, fire, dust, and moisture. Designed with a low closing force mechanism, the drop-down bar activates smoothly when the door closes, creating a reliable seal without affecting door operation. Its full mortise design offers a clean, flush appearance, making it ideal for high-end residential and commercial doors.
Key Features
- Full Mortise Design – Clean, flush-mounted appearance for high-end doors
- Low Closing Force Mechanism – Meets ANSI A117.1 and ADAAG 2010 requirements
- Drop-Bar Seal with PemkoPrene Insert – Flexible, durable, and chemically resistant
- Hinge-Side Actuation – Prevents skidding and door hang-ups during closure
- Fills gaps up to 3/4″ for effective environmental and acoustic sealing
- Suitable for wood or metal doors, reversible for easy installation
- Everyday resilience with minimal opening/closing impedance
Available Finishes
- 434APKL: A – Mill Finish Aluminum Aluminum with Black Sponge EPDM insert
Benefits
- Blocks drafts, dust, moisture, insects, fumes, light, sound, fire, and smoke
- Smooth operation with long-lasting durability
- Mortised application maintains a professional, aesthetic look
- Ideal for commercial and residential doors requiring fire, smoke, and sound compliance
Specifications
- Base Material: Aluminum
- Insert: Black PemkoPrene®
- Fasteners: FHSMS #6 x 5/8″
- Maximum Length: 72″
- Minimum Length: 12″
- Overall Height: 1-5/16″
- Width: 27/32″
Certifications & Ratings
- GREENGUARD Gold Certified
- Air Infiltration Tested
- Sound Tested – ASTM E90
- BHMA Certified
- Smoke Tested – UL 1784
- Fire Rated – UL 10C (Positive Pressure)
- Underwriters Laboratory 4L10
- ANSI/BHMA A156.22 Compliant
With its PemkoPrene insert and low-force full mortise design, this automatic door bottom ensures superior sealing performance while maintaining a clean, professional appearance for premium doors.








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