We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brown vinyl automatic door bottom with 1 inch flange

Frost King

Frost King B79/36H Automatic Door Bottom Brown

SKU CH-9QAE-ZDJ52

Automatic door bottom with vinyl housing seals gaps to block drafts and noise

  • TypeDoor Hardware & Components
  • Automatic seal blocks drafts when door closes
  • Vinyl housing resists wear and moisture
  • Brown finish blends with common door colours
  • 36-inch length fits standard interior openings
  • 1-inch flange height covers typical threshold gaps

Automatic Door Bottom Brown

The Frost King B79/36H Automatic Door Bottom Brown seals the gap beneath a door to block drafts, light and noise. It mounts to the door face and activates automatically when the door closes. The brown vinyl housing suits interior or exterior doors where a simple, paintable finish is preferred.

Homeowners sealing a single door

This unit fits a standard 36-inch door width and installs with basic tools. It is not suited for doors wider than the supplied length or for openings that require a mortised installation. Buyers needing adjustable width or a metal housing should consider a different model.

36-inch door width fit

The sweep is sized for a 36-inch door and cannot be extended beyond that length. Measure the door before purchase to confirm the width matches. The 1-inch flange height determines the clearance needed at the bottom of the door.

Highlights

  • Automatic seal blocks drafts when door closes
  • Vinyl housing resists wear and moisture
  • Brown finish blends with common door colours
  • 36-inch length fits standard interior openings
  • 1-inch flange height covers typical threshold gaps

Specifications

BrandFROST KING
TypeDoor Hardware & Components

Questions about this item

How is the Frost King B79/36H automatic door bottom installed, and what step is commonly missed?

Mount the unit to the door bottom with the vinyl seal facing down; the step often missed is adjusting the activation plunger so it contacts the threshold only when the door is fully closed.

What maintenance or replacement will the vinyl seal on this automatic door bottom need later?

Inspect the vinyl seal annually for cracking or compression set; replace the seal insert when it no longer springs back to contact the threshold evenly.

What limit appears first on the Frost King B79/36H under sustained daily cycling?

The vinyl seal fatigues first, losing its memory and allowing drafts after repeated compression cycles against the threshold.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.