NGP 420 Automatic Door Bottom ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$226.86
NGP NGP 420 Automatic Door Bottom with Neoprene Seal, Heavy Duty Surface NGP-420

NGP 420 Automatic Door Bottom with Neoprene Seal - Heavy Duty Surface Mount with 7/8" Drop

(No reviews yet) Write a Review

Model: 420NA 42
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$226.86
Adding to cart… The item has been added
Free Shipping on orders over $99
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

NGP Automatic Door Bottom with Neoprene Seal - Heavy Duty Surface Mount with 7/8" Drop

Professional Weathersealing Solution for Commercial Applications

The NGP Automatic Door Bottom delivers superior weathersealing performance with BHMA certified Grade 1 durability rated for 1,000,000 cycles. Constructed from aluminum alloy 6063 T5 temper with advanced synthetic rubber polymer blend featuring PVC, Nitrile rubber (NBR), and Chloroprene closed cell elastomeric foam. Available in lengths from 11" minimum to 60" maximum with 7/8" maximum drop for comprehensive door sealing applications.

Professional Features & Benefits

  • BHMA Grade 1 Certification: Certified to ANSI/BHMA A156.22 with 1,000,000 cycle testing and performance tests for heat and cold resistance.
  • Heavy-Duty Construction: Aluminum alloy 6063 T5 temper housing provides exceptional durability for high-traffic commercial applications.
  • Advanced Seal Technology: Synthetic rubber polymer blend with PVC, Nitrile rubber (NBR), and Chloroprene closed cell foam delivers superior abrasion resistance and tensile strength.
  • Wide Temperature Range: Operates effectively from -20 F to 200 F with excellent resistance to ozone, sunlight, and aging.
  • Flexible Length Options: Available from 11" minimum to 60" maximum length with field cutting capability for 36" and longer units (up to 4" reduction).
  • Versatile Installation: Surface mounts on push side of door with half mortise option available (specify HM in item number).
  • Maximum Sealing Performance: 7/8" maximum drop with recommendation to use with threshold for optimal sealing capability.
  • Flame and Moisture Resistant: Advanced elastomeric foam construction provides flame resistance and moisture protection for demanding environments.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Product Type: Automatic Door Bottoms
  • Subcategory: Gaskets & Weatherstripping

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 NGP Quality?

NGP Automatic Door Bottoms deliver professional-grade reliability with aluminum alloy 6063 T5 temper construction and advanced synthetic rubber polymer sealing technology rated for 1,000,000 cycles. BHMA Grade 1 certification ensures consistent performance in demanding commercial applications where dependable weathersealing is essential.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

NGP 420NA 42 – Frequently Asked Questions

1) What is the NGP 420 automatic door bottom used for?
The NGP 420 provides automatic sealing at the bottom of doors when closed. The neoprene seal drops down to contact the threshold, blocking air, sound, smoke, and light infiltration.
2) What door types and thicknesses work with this door bottom?
Compatible with wood and hollow metal doors. Verify door thickness and width requirements with manufacturer specifications. Check that door bottom rail has adequate clearance for surface mounting.
3) How does the automatic operation work?
When door closes, the actuating mechanism triggers the seal to drop down automatically. When door opens, the seal retracts upward to clear the threshold and floor.
4) What finish options are available?
Verify available finishes with product specifications. Common options include aluminum mill finish, dark bronze anodized, and other architectural finishes to match door hardware.
5) Is this suitable for heavy-duty commercial applications?
Yes, designed for heavy-duty surface mounting applications. The robust construction handles frequent door operation in commercial environments.
6) Does this meet fire door requirements?
Check manufacturer listings for fire door compatibility and ratings. Verify local code requirements for automatic door bottoms on fire-rated assemblies.
7) Are replacement parts available for the NGP 420?
Replacement neoprene seals and internal mechanisms are typically available. Contact manufacturer for specific part numbers and availability for ongoing maintenance.
8) How is this door bottom installed?
Surface mounts to door bottom rail with screws. Follow manufacturer template for proper positioning. Ensure adequate clearance between door and threshold when seal deploys.
9) What maintenance does the automatic mechanism require?
Periodically check seal deployment and retraction. Clean debris from mechanism. Lubricate moving parts as recommended. Replace worn neoprene seals when sealing performance decreases.
10) Are there similar models in the NGP line?
NGP offers various automatic door bottom models with different seal materials and mounting options. Compare specifications to select the best model for your application requirements.
11) What floor conditions work best with this door bottom?
Works on smooth, level floors and thresholds. Uneven surfaces may prevent proper seal contact. Check threshold height and door clearances before installation.
12) What are the key measurements needed for ordering?
Measure door width, door thickness, and bottom rail dimensions. Verify clearance between door bottom and threshold. Check manufacturer sizing chart for proper model selection.
How fast can I get the NGP 420NA 42 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 NGP 420NA 42 come with a warranty?
Absolutely. The NGP 420NA 42 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 NGP 420NA 42?
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 NGP 420NA 42 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.
!