Pemko 4301_NBL Brush Seal/Automatic Door Bottom


Air Infiltration TestedAir Infiltration Tested


BHMA CertifiedBHMA Certified

Smoke Tested - UL1784Smoke Tested – UL1784

Fire Rated - UL10C - Positive PressureFire Rated – UL10C – Positive Pressure

Underwriters Laboratory 4L10Underwriters Laboratory 4L10

GREENGUARD Gold CertifiedGREENGUARD Gold Certified


Non-Handed, Semi-Mortise and Full Surface

  • When ordering, must specify if the automatic door bottom is for a semi-mortise application so that shorter screws can be provided.
  • BHMA logo represents products that meet the requirements of ANSI/BHMA 156.22-2012 for latching force and air infiltration.
  • Smoother action positive seal mechanism.
  • All Pemko automatic door bottoms consist of an aluminum case which surrounds a movable drop-bar seal.
  • The drop-bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop-bar seal down against the floor/threshold.
  • Available in any size ranging from 18″ to 48″.
  • All Pemko automatic door bottoms are provided at NET length.
  • All Pemko automatic door bottoms can be trimmed down by as much as 2″ in the field (stock lengths only).
  • If non-stock sizes are ordered, order must note need to trim 2 inches from the size ordered.
  • The drop-bar seal actuation mechanism causes the drop-bar seal to always actuate on the hinge side first.
  • This feature prevents the seal from skidding along the floor / threhold while the door is being closed.
  • Door hang-up will not occur.
  • This automatic door bottom is supplied with a Nylon Brush (“NB”) insert – item number P516062.
  • Standard color for this part is black, but it is also available in gray.

© 2017, Best Brothers Group. All rights reserved.




C - Clear4301CNBL: C – Clear Anodized Aluminum with Gray Nylon Brush insert

D - Dark Bronze4301DNBL: D – Dark Bronze Anodized Aluminum with Black Nylon Brush insert

© 2017, Best Brothers Group. All rights reserved.