Pemko STC411 Full Mortise Acoustic Automatic Door Bottom

Usually Ships: 5-10 Days
  • Provides excellent performance for acoustic openings
  • Sound and air infiltration tested
  • Fire-rated and smoke tested

Available Options:


The Premier Pemko Acoustic Automatic Door Bottom

The Pemko STC411™ automatic door bottom is the latest design for high-quality performance in acoustic control and sound attenuation. The newly designed spring assembly increases the pressure applied on the drop bar across the entire length of the automatic door bottom, maximizing seal performance.

When installed, the high quality, multi-finned seal of the Pemko STC- series automatic door bottoms conform to slight irregularities in thresholds, sills, and most flooring materials. The seal not only provides superior acoustic performance but also seals the opening against wind and debris to improve its overall energy efficiency.

  • Multi-finned seal – Top of the line acoustic performance and energy-efficient sealing
  • Meets ANSI Standard S12.60-2010 – Helps earn LEED Credits
  • Meets UL10B, UL10C and UL1784 – Fire and Smoke Tested
  • Pemko automatic door bottoms are provided NET length

STC411APK: A – Mill Finish Aluminum with Black PemkoPrene insert


  •  Air Infiltration Tested – Air infiltration tested in accordance with ASTM E283-04.
  •  Sound Tested – Tested to meet ASTM E 90-2009 Standard.Tested to meet ANSI Standard S12.60-2010, Acoustical Performance Criteria.
  •  BHMA Certified
  •  Smoke Tested – UL1784
  •  Fire Rated – UL10C – Positive Pressure
  •  Underwriters Laboratory 4L10
  •  GREENGUARD Gold Certified


36", 42", 48"


A – Mill Finish Aluminum

Fire Rating

Fire Rated – UL10C – Positive Pressure