Pemko 411 Full Mortise Automat...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$70.76
$62.23
Pemko 411 Full Mortise Automatic Door Bottom with Drop-Bar Seal

Pemko 411 Full Mortise Automatic Door Bottom with Drop-Bar Seal

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Model: 411ARL-30
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$70.76
$62.23
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Pemko 411 Full Mortise Automatic Door Bottom with Drop-Bar Seal

Automatic Sealing for Commercial Door Assemblies

The Pemko 411 is a full mortise automatic door bottom that deploys a drop-bar seal the moment the door closes, then retracts automatically when the door opens — eliminating floor drag and delivering consistent, hands-free sealing performance. Mortised flush into the door bottom, the 411 disappears into the door face for a clean architectural finish. The extruded aluminum housing (W: 9/16", H: 1-3/8") is available in lengths from 28" to 72" and accepts four interchangeable insert types to match the sealing requirement of the opening.

Features & Benefits

  • Automatic Drop-Bar Mechanism: Seal deploys on door close and retracts on open — no floor drag, no manual adjustment, consistent performance across high-traffic openings.
  • Full Mortise Installation: Housing routes into a routed pocket in the door bottom for a flush, low-profile appearance on wood or hollow metal doors.
  • Four Insert Options: Choose EPDM Sponge Neoprene (ARL), Nylon Brush (ANBL), PemkoPrene (APKL), or Sponge Silicone (ASL) to match the sealing demand — draft, dust, moisture, insects, fumes, light, or sound.
  • Aluminum Construction: Extruded aluminum housing resists corrosion and holds dimensional stability in demanding commercial environments.
  • Multiple Lengths: Available in 28", 30", 32", 36", 42", 48", and 72" to fit standard and oversized commercial door widths.
  • Comprehensive Certifications: UL10C positive pressure fire rated, UL1784 smoke tested, BHMA certified, air infiltration tested, ASTM E90 sound tested, cUL Listed 4L10, and GREENGUARD Gold Certified.
  • 5-Year Warranty: Pemko backs the 411 with a 5-year warranty for confidence in long-term commercial installations.

Technical Specifications

  • Model: 411
  • Product Type: Full Mortise Automatic Door Bottom
  • Housing Dimensions: W: 9/16", H: 1-3/8"
  • Available Lengths: 28", 30", 32", 36", 42", 48", 72"
  • Substrate: Aluminum
  • Application: Wood or Hollow Metal Doors
  • Insert Types: EPDM Sponge Neoprene (ARL), Nylon Brush (ANBL), PemkoPrene (APKL), Sponge Silicone (ASL)
  • Certifications: UL10C Positive Pressure Fire Rated, UL1784 Smoke Tested, BHMA Certified, Air Infiltration Tested, ASTM E90 Sound Tested, cUL Listed 4L10, GREENGUARD Gold Certified
  • Commercial/Residential: Commercial
  • Warranty: 5 Year

Typical Applications

  • Fire-rated corridor and stairwell doors in commercial office buildings
  • Healthcare and institutional facilities requiring smoke and sound control
  • Educational facilities and government buildings
  • Multi-family residential common areas and unit entry doors
  • Hospitality properties with high-traffic door openings
  • Retail and industrial facilities requiring draft, dust, and moisture exclusion

Why Pemko 411?

When a door opening must meet fire, smoke, sound, and energy code simultaneously, the 411's multi-certification profile eliminates the need to source separate products for each requirement. The automatic mechanism removes the performance variability of manual sweeps, and the full mortise profile keeps the door face clean — a specification-grade solution for architects, contractors, and facility managers who need the opening to perform reliably from day one.

Product Specs

Features:
Seals to Keep Out Draft, Dust, Moisture, Insects, Fumes, Light, Sound
Application:
Wood or Hollow Metal Doors
Insert Type:
ARL - EPDM Sponge Neoprene, ANBL - Nylon Brush, APKL - PemkoPrene, ASL - Sponge Silicone
Warranty:
5 Year
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Door Bottoms & Door Shoes
ANSI/BHMA:
Air Infiltration Tested, Sound Tested ASTM E90, BHMA Certified, Smoke Tested UL1784, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, GREENGUARD Gold Certified
Commercial/Residential:
Commercial
Product Model:
411
Product Length:
28", 30", 32", 36", 42", 48", 72"
Product Dimension:
W: 9/16", H: 1-3/8"
Product Category:
Door Trim and Accessories
Product Substrate:
Aluminum
Department:
Door Hardware

Pemko 411ARL-30 – Frequently Asked Questions

1) Will the Pemko 411 automatic door bottom work on a hollow metal door, or is it wood only?
Both. The 411 full mortise automatic door bottom is rated for wood or hollow metal doors. It routes into a pocket cut in the bottom edge of the door, so the door has to be able to take a mortise 9/16 inch wide and 1-3/8 inch deep for the housing. On hollow metal that means the door bottom channel has to accept the extrusion; on wood it's a straight rout. If you can't cut the door bottom, a surface applied sweep or a door shoe is the way to go instead.
2) What size mortise pocket do I need to cut for a Pemko 411 door bottom?
The 411 housing is an extruded aluminum section measuring 9/16 inch by 1-3/8 inch, so that is the cross section of the pocket the door bottom has to accept. Length follows the door width: 28, 30, 32, 36, 42, 48, and 72 inch units are made. Order the length that matches your door width and cut the pocket the full run of the housing.
3) Can I use a Pemko 411 automatic door bottom on a fire rated stairwell door?
Yes. The 411 is UL10C positive pressure fire rated and cUL Listed 4L10, and it is also UL1784 smoke tested, which is the pairing you need on a fire rated corridor or stairwell opening that has to hold a smoke rating too. It's BHMA certified as well. Because it mortises into the door, confirm your fire door manufacturer permits the bottom edge prep on that specific labeled door.
4) Which insert should I pick on a Pemko 411, the neoprene, brush, PemkoPrene, or silicone?
Four inserts are offered and they trade off differently. ARL EPDM sponge neoprene is the general purpose seal for draft, dust and light. ANBL nylon brush drags less and tolerates uneven floors, but a brush is the weakest choice where you need an air or smoke seal. APKL PemkoPrene is the durable elastomer seal for high traffic. ASL sponge silicone holds up to heat and takes a compression set less readily, which is why it turns up on fire rated and high temperature openings. All four are made in every length from 28 through 72 inches.
5) What length Pemko 411 do I order for a 36 inch door?
A 36 inch unit covers a standard 3-0 door leaf. Lengths run 28, 30, 32, 36, 42, 48, and 72 inches. Automatic door bottoms are cut to the door width, so order the length at or just under your actual leaf width and trim per Pemko's instructions rather than ordering long and hoping. For a pair of 3-0 doors you need two 36 inch units, one per leaf, not a single 72.
6) Do I need an automatic door bottom or will a door sweep do the job?
A surface sweep rides on the floor all the time, so it drags on carpet and thresholds and wears out where traffic is heavy. The 411 drops its seal only when the door closes and lifts it clear when the door opens, so there's no floor drag and the seal contacts the same way every cycle. That's why it's used on fire, smoke and sound rated openings where the seal has to perform predictably. If the opening is a low traffic interior door with a flat hard floor and no rating to meet, a sweep is simpler and needs no door prep.
7) Will a Pemko 411 help with sound transfer between a hotel room and the corridor?
It's ASTM E90 sound tested, and the drop bar seals the gap under the door, which is normally the biggest acoustic leak in an otherwise solid opening. It's also air infiltration tested and seals against draft, dust, moisture, insects, fumes, and light. For sound work pick a solid elastomer insert over the nylon brush; a brush won't close the air path the way a sponge neoprene, PemkoPrene or sponge silicone insert will.
8) Can I get a Pemko 411 automatic door bottom for a 6 foot wide oversized door?
Yes, a 72 inch length is made, and it's offered with all four inserts including the nylon brush and sponge silicone. That covers oversized single leaves in industrial and institutional openings. Between 48 and 72 inches there's no intermediate length, so a 72 inch unit cut down is the route for anything in that range.
9) Is the Pemko 411 door bottom rated for commercial use, and will it corrode in a damp opening?
It's a commercial grade unit. The housing is extruded aluminum, which doesn't rust, so exterior and damp service entries are within its range. It's also GREENGUARD Gold Certified, which matters if you're on a LEED or institutional job with indoor air quality requirements.
10) Will the Pemko 411 show on the face of the door after it's installed?
No. The 411 is a full mortise unit, so the housing sits inside a routed pocket in the bottom edge and only the seal itself is visible below the door. Nothing is applied to the door face. That's the difference between it and a surface applied automatic door bottom, which screws to the face and shows a visible aluminum bar. On architectural openings where the door face has to stay clean, the mortise version is the one specified.
How fast can I get the Pemko 411ARL-30 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko 411ARL-30 come with a warranty?
Absolutely. The Pemko 411ARL-30 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pemko 411ARL-30?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pemko 411ARL-30 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

Product Reviews

  • 4
    Automatic door bottom

    Posted by Tyler Coviello on Aug 8th 2025

    The Pemko 411 Full Mortise Automatic Door Bottom is an excellent solution for sealing the gap at the bottom of a door without a visible, surface-mounted component. Its "full mortise" design means it's installed discreetly inside the door itself, creating a clean, professional look that doesn't interfere with the door's aesthetics.

  • 4
    Automatic door bottom

    Posted by Tyler Coviello on Jul 18th 2025

    Blocks Sound: It makes a big difference in stopping sound. Great for bedrooms or offices where you want quiet. I noticed less noise right away. Saves Energy: It stops drafts, keeping warm air in during winter and cool air in during summer. This can help lower your energy bills. Keeps Bugs Out: The tight seal also helps keep insects, dust, and dirt out of your home. Built to Last: Pemko products are strong, and this one is too. It feels very durable and works well without issues, even after months of use.

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