Zero 362AA Heavy-Duty Semi-Mortise Automatic Door Bottom

Usually Ships: 20-30 Days
  • Semi-mortise, 7/8″ drop
  • Supplied with closed cell sponge neoprene
  • Fire-rated, sound tested

Available Options:


The patented automatic door bottom technology from Zero ensures an efficient seal against the floor or saddle. As the door is closed, the adjustable plunger is compressed against the door frame, activating a concealed flat spring mechanism. Zero door bottoms are designed to block penetration by air, sound, smoke, and flames.

  • AA = Anodized aluminum
  • Supplied with closed cell sponge neoprene
  • Fire-rated UL10C
  • Sound tested
  • ANSI/BHMA: R3B3441
  • Consult your local AHJ for maximum allowable door undercut


36", 42", 48"


Clear Anodized Aluminum

Fire Rating

Fire Rated – UL10C – Positive Pressure