Pemko 4301 Surface Mounted Aut...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$173.91
Pemko Pemko 4301 Surface Mounted Automatic Door Bottom PMK-4301

Pemko 4301 Surface Mounted Automatic Door Bottom with 3/4" Drop and Fire Rating

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Model: 4301CRL36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$173.91
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Pemko 4301 Surface Mounted Automatic Door Bottom with 3/4"; Drop and Fire Rating

Professional Automatic Door Sealing Solution

The Pemko 4301 Automatic Door Bottom provides comprehensive sealing performance with a maximum 3/4"; drop and 1/2"; recommended gap under door. This aluminum-constructed door bottom features a movable drop bar seal actuated by a plunger that contacts the jamb as the door closes, forcing the seal down against the floor or threshold. Fire rated up to 3 hours for steel doors and up to 1-1/2 hours for wood doors, this professional-grade sealing solution is ideal for applications requiring automatic closure over carpet.

Professional Features & Benefits

  • Automatic Operation: Plunger-actuated drop bar seal automatically engages when door closes, providing consistent sealing without manual operation.
  • Maximum Drop Capacity: 3/4"; maximum drop with 1/2"; recommended gap under door accommodates various floor conditions and carpet installations.
  • Fire Rating Performance: UL10B and UL10C Positive Pressure tested for fire doors rated up to 3 hours on steel frames and up to 1-1/2 hours on wood doors.
  • Heavy-Duty Construction: Aluminum case construction provides durability and corrosion resistance for long-term commercial performance.
  • Comprehensive Sealing: Effectively seals against draft, dust, moisture, insects, fumes, light and sound transmission.
  • Adjustable Installation: Slotted holes allow for precise positioning and adjustment during installation for optimal sealing performance.
  • Low Closing Force: Engineered for minimal door closing resistance while maintaining effective sealing operation.
  • Manufacturer Warranty: 5 Year warranty coverage for added confidence and protection.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Pemko Quality?

Pemko automatic door bottom products deliver professional-grade sealing performance with aluminum construction and comprehensive testing certifications including UL10B, UL10C Positive Pressure, and BHMA A156.22 compliance. 5 Year warranty coverage provides added confidence for demanding commercial applications. Engineered for reliable automatic operation with low closing force requirements where consistent floor sealing is essential.

Product Documentation & Resources

Manufacturer Resources

Product Specs

Features:
Recommended Gap Under Door is 1/2", Maximum Drop is 3/4", For Semi Mortised Applications
Application:
Wood or Hollow Metal Doors
Insert Type:
RL - EPDM Sponge Neoprene, PKL - PemkoPrene,
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 ASTM E-283-04, Sound Tested ASTM E90, BHMA Certified ANSI/BHMA A156.22, Smoke Tested UL 1784, NFPA 105-2013, Fire Rated UL10B, UL10C Positive Pressure
Commercial/Residential:
Commercial
Product Model:
4301
Product Length:
36"
Product Dimension:
W: 29/2", H: 1-25/32"
Product Category:
Door Trim and Accessories
Product Substrate:
Aluminum
Department:
Door Hardware

Pemko 4301CRL36 – Frequently Asked Questions

How fast can I get the Pemko 4301CRL36 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 4301CRL36 come with a warranty?
Absolutely. The Pemko 4301CRL36 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 4301CRL36?
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 4301CRL36 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

  • 5
    Seal

    Posted by Shane on Oct 25th 2025

    can be a bit overwhelming if not installed correctly double check you layout and you wont be disappointed

!