Description
The PEMKO 4131CRL36 is a surface-mounted automatic door bottom designed to create a tight perimeter seal at the base of a door when it closes. The unit deploys a sealing element that drops into contact with the threshold or floor surface as the door swings shut and retracts automatically when the door opens. The sealing element is EPDM, a durable synthetic rubber well suited for repeated compression cycles across a wide temperature range. Finished in clear aluminum, the 4131CRL36 is sized for a 36-inch door and is installed by commercial door and hardware technicians on new construction and retrofit projects.
This door bottom is used in commercial and institutional building applications where controlling air infiltration, drafts, dust, light, insects, and sound transmission at the door base is required. It mounts directly to the face of the door bottom, eliminating the need to rout or mortise the door. Typical installations include office buildings, schools, healthcare facilities, and multi-family residential entry doors where threshold sealing performance is a priority.
Key Features
- Surface-mounted design installs without routing or mortising the door
- Automatic drop-seal mechanism deploys on door close and retracts on open
- EPDM sealing element provides durable compression resistance over repeated cycles
- Clear aluminum finish suits commercial door applications with minimal visual impact
- Sized for 36-inch door openings
- Sold individually as a single unit
Compatibility
Designed as an OEM-style replacement or new-installation automatic door bottom for standard commercial and residential doors requiring a surface-mounted seal at the base.
Installation Notes
Installation is performed by a qualified door hardware technician or commercial contractor. The door should be removed or held stationary during fitting to ensure accurate screw placement along the door bottom face. Verify door clearance between the bottom of the door and the threshold or floor before mounting to confirm proper seal engagement without binding. Follow applicable building codes for fire-rated or smoke-control door assemblies where required.
Technical Specifications
- Door Width (Nominal): 36 inches
- Length: 37.25 inches
- Width: 2.4 inches
- Height: 0.9 inches
- Seal Material: EPDM
- Finish: Clear Aluminum
- Mounting Type: Surface Mounted
- Weight: 1.8 pounds
- Sold As: Each
Standard Information
- Brand: PEMKO
- Manufacturer Part Number: 4131CRL36
