Description

Pemko STC4131_PK Acoustic Automatic Door Bottom

The Pemko STC4131_PK Acoustic Automatic Door Bottom is a high-performance solution for acoustic doors, designed to provide “sealed-in-place” sound control. Independently tested, it meets ANSI S12.60-2002 standards for acoustical performance and ensures consistent, reliable sealing in public buildings, commercial spaces, schools, and more.

Featuring a smooth-action positive seal mechanism, this automatic door bottom lowers a precision drop-bar seal when the door closes, preventing sound, drafts, and air leakage. It is easy to install, fully reversible without disassembly, and can be surface applied or semi-mortised to fit a wide range of door designs.

Key Features

• Independently tested for “sealed-in-place” acoustic performance
• Meets ANSI S12.60-2002 standards for schools
• Smooth-action positive seal mechanism with aluminum housing
• Jamb-contacting plunger activates drop-bar seal during door closure
• Hinge-side actuation prevents seal skidding and door hang-up
• End plate kits included
• Lead line available upon request for profile customization
• Can be installed as surface-applied or semi-mortised

Benefits

• Provides excellent acoustic performance for commercial and public buildings
• Supports LEED IEQ School Credits for enhanced acoustical performance
• Quick and easy installation; simply flip to reverse handing
• Rubber-like insert offers flexibility and durability similar to natural rubber
• Outstanding resistance to cleaning fluids and disinfectants
• Low resistance ensures smooth daily door operation
• Offers architectural design freedom for gaskets and seals

Specifications

• Base Material: Aluminum
• Fasteners: THSMS #8 x 1-1/4″
• Maximum Length: 72″
• Minimum Length: 12″
• Overall Height: 1-27/32″
• Width: 19/32″

Certifications & Compliance

• GREENGUARD Gold Certified
• Environmental Product Declaration (EPD)
• UL 1784 – Air Leakage Tests
• UL 10C – Positive Pressure Fire Tests
• ASTM E-283-04 (2012)
• ASTM E90-2009
• ANSI/BHMA A156.22 – Door Gasketing & Edge Seal Systems

The Pemko STC4131_PK Acoustic Automatic Door Bottom delivers reliable soundproofing, smooth operation, and long-lasting durability, making it ideal for schools, offices, hotels, hospitals, and other spaces where acoustic control is essential.

Finish Available

• STC4131CPK – Clear Anodized Aluminum
• STC4131DPK – Dark Bronze Anodized Aluminum