NGP 178SA Overlapping Astragal...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$407.54
NGP 178SA overlapping astragal with silicone seal, anodized aluminum, showing flat bar profile and pre-drilled mounting hole

NGP 178SA Overlapping Astragal with Silicone Seal - Anodized Aluminum, 120" Maximum Height

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Model: 178SA-84

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

$407.54
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NGP 178SA Overlapping Astragal with Silicone Seal, Anodized Aluminum

The NGP 178SA is an overlapping astragal with a synthetic siloxane rubber polymer seal in an aluminum alloy 6063 T5 temper frame, anodized finish. Available in 84", 85", and 96" lengths, with a maximum installation height of 120". The silicone seal maintains flexibility and memory across a temperature range of -100 F to 500 F. Certified to ANSI/BHMA A156.22 for heat and cold applications. Recommended for areas equipped with FM200 or Halon fire suppression systems.

Features

  • Frame: Aluminum alloy 6063 T5 temper, anodized finish
  • Seal: Synthetic siloxane rubber polymer; black; flame-resistant and moisture-resistant
  • Maximum Installation Height: 120"
  • Available Lengths: 84", 85", 96"
  • Temperature Range: -100 F to 500 F
  • Seal Properties: Excellent flexibility and memory; resistant to ozone, UV, and aging
  • Fire Suppression Compatibility: Suitable for FM200 and Halon suppression system environments
  • Certification: ANSI/BHMA A156.22, heat and cold applications
  • Fasteners Included: #10 x 3/4" SMS fasteners
  • Optional Accessory: FATT (Fast Attach Tape) available separately

Typical Applications

  • Commercial office buildings
  • Educational facilities
  • Healthcare institutions
  • Retail establishments
  • Industrial and warehouse facilities
  • Multi-tenant residential properties
  • Government and municipal buildings

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Astragal
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

NGP 178SA-84 – Frequently Asked Questions

1) Will the NGP 178SA astragal work on a pair of doors, or is it for a single door?
The 178SA is an overlapping astragal, so it mounts to one leaf of a pair and laps over the meeting edge of the other. That is what closes the gap between the two active leaves. If your opening is a single door in a frame, this is the wrong part, you want perimeter gasketing instead. Note it is a one-sided overlapping profile, not a split or T-astragal, so unlike the Pemko 369 split astragal or the Cal-Royal EAST-501 T-astragal you install one piece on one leaf rather than mating halves on both.
2) Can the NGP 178SA astragal handle a walk-in freezer or a boiler room door?
Temperature range on the silicone seal is -100 F to 500 F, and it stays flexible at both ends, so cold storage and high-heat mechanical rooms are both inside its band. The seal is a synthetic siloxane rubber polymer, which is also why it resists ozone, UV and aging rather than going hard and taking a set the way a vinyl insert can.
3) Is the NGP 178SA astragal BHMA certified, and to which standard?
It is BHMA certified to ANSI/BHMA A156.22, tested for heat and cold applications. That is the gasketing and edge seal standard, so it is the citation a spec writer or facilities buyer needs on a submittal for a commercial opening.
4) Which astragal should I use on a server room with FM200 or Halon fire suppression?
The NGP 178SA is the one NGP recommends for FM200 and Halon areas. Those systems only hold a concentration if the room stays sealed, and the silicone seal is flame resistant and moisture resistant with the memory to keep pulling tight against the meeting edge after repeated cycles. A pile brush astragal like the Pemko 300 Series or the Pemko 369 sweeps debris but does not give you the same compression seal for holding an agent concentration.
5) I need an astragal that works around a mortise lock on a pair of doors. Is the NGP 178SA the right one?
No. The 178SA is a full-height overlapping seal running the leaf, meant to close the gap and seal it, not to clear lock hardware. For an opening where the astragal has to work around a lock, the Trimco 5001 lock astragal is made for mortise or cylindrical locks, and the Trimco 5002 is the cylindrical-lock version at 1-9/16 by 6 inches. Both are stainless steel and short, covering the lock area rather than the full height.
6) What is the closest equivalent to the NGP 178SA overlapping astragal for a pair of doors?
The Pemko 300 Series adjustable astragal is the nearest peer for the same job: it is an astragal for double doors that seals the meeting stile, using a self-adjusting pile brush instead of the 178SA's silicone seal. The 178SA overlaps the inactive leaf with a silicone bulb in an anodized aluminum carrier and is BHMA certified to ANSI/BHMA A156.22 for heat and cold. Choose on seal material: pile brush tolerates a meeting stile that does not close consistently, while silicone gives a compression seal that holds from -100 F to 500 F.
7) The NGP 178SA overlaps one leaf; what do I use if I need gasketing on both meeting stiles instead?
The Pemko 369 split astragal seal is the alternative for that condition. It is a split astragal with a pile brush insert measuring 13/32 inch by 11/32 inch in aluminum, applied so the seal is divided between the two leaves rather than carried on a single overlapping member. The NGP 178SA is an overlapping type: one continuous anodized aluminum piece runs up to 120 inches on one leaf and laps the other. Use the split profile where both leaves must be free to open independently without a lip crossing the gap.
8) Does the NGP 178SA astragal come with fasteners, or do I need to buy screws separately?
#10 x 3/4 inch sheet metal screws ship with it, so a standard hollow metal or wood leaf needs nothing extra to hang it. Fast Attach Tape (FATT) is available as an option if you would rather not put screws through the face of the door, which matters on a leaf you do not want to drill.
9) What is the NGP 178SA astragal made of, and will it hold up outdoors?
Frame is 6063 aluminum alloy in T5 temper, anodized, with a black silicone seal. Anodized aluminum is corrosion resistant, and the seal carries stated resistance to ozone, UV and aging, so exterior and high-exposure openings are within what the material is built for.
10) My pair of doors has an uneven gap at the meeting edge. Will an overlapping astragal like the 178SA close it?
An overlapping profile laps over the gap rather than trying to meet a mating half, so it tolerates an inconsistent meeting edge better than a split astragal does. The silicone seal has stated memory characteristics, meaning it recovers its shape after being compressed door cycle after door cycle instead of taking a permanent set. If the gap varies a lot down the height, the Pemko 300 Series adjustable astragal with a self-adjusting pile brush is the other approach, adjustment rather than overlap.
11) What is a simpler astragal than the NGP 178SA for an interior double door that does not see extreme temperatures?
The Cal-Royal EAST-501 aluminum T-astragal with vinyl insert for double doors covers that case with an aluminum carrier and a vinyl seal. The NGP 178SA carries a synthetic siloxane rubber polymer seal certified to ANSI/BHMA A156.22 for heat and cold, holding flexibility from -100 F to 500 F, and is recommended for rooms served by FM200 or Halon fire suppression. Where the opening is conditioned on both sides and no temperature or suppression-gas requirement applies, a vinyl insert astragal is the plainer specification; reserve the silicone seal for openings that state one.
12) I need an astragal on a fire-rated pair of doors. How does the NGP 178SA compare with the Pemko 369?
The Pemko 369 split astragal seal with pile brush insert is listed as fire-rated aluminum, 13/32 inch by 11/32 inch, and its stated product function is gasketing. The NGP 178SA is certified to ANSI/BHMA A156.22 performance tests for heat and cold and is recommended for areas using FM200 or Halon fire suppression systems, with flame-resistant and moisture-resistant properties. On a labeled opening, match the astragal to the door manufacturer's listing and the door thickness; on an unlabeled opening where the concern is sealing against smoke, air and suppression agent, the 178SA silicone profile is the applicable choice.
13) Is the NGP 178SA astragal rated for commercial use, or is it a residential product?
Commercial. It is specified for office buildings, schools, healthcare, retail, industrial and warehouse space, multi-tenant residential and government buildings. The aluminum frame and BHMA A156.22 certification are what put it in the commercial column rather than a residential-grade seal.
14) Can I use the Trimco 5002 and the NGP 178SA on the same pair of doors?
They address different parts of the opening and are not mutually exclusive. The Trimco 5002 is a stainless steel lock astragal, 1-9/16 inch by 6 inch, used with cylindrical locks, and the Trimco 5001 is the version for mortise or cylindrical locks; both sit at the latch. The NGP 178SA runs the meeting stile as an overlapping astragal with a silicone seal and ships with #10 x 3/4 inch SMS fasteners. Where an overlapping full-height astragal is already installed, it laps the gap at the lock as well, so confirm the lock trim clears the astragal lip before adding a separate lock astragal.
How fast can I get the NGP 178SA-84 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 178SA-84 come with a warranty?
Absolutely. The NGP 178SA-84 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 178SA-84?
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
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