Pemko 357 T Overlapping Astrag...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$78.31
$58.06
Pemko 357 T Overlapping Astragal 2" Width Galvannealed Steel Door Seal System – angled top view showing mounting hole

Pemko 357 T Overlapping Astragal 2" Aluminum Double Door Seal

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Model: 357C 84IN
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$78.31
$58.06
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Pemko 357 T Overlapping Astragal — 2" Aluminum Double Door Seal System

The Pemko 357 T Overlapping Astragal is a surface-applied sealing system for pairs of commercial doors. Its 2" wide aluminum profile closes the gap between door leaves to block drafts, light, smoke, and moisture. Available in Clear Anodized, Dark Bronze Anodized, and Galvannealed Steel finishes in 84", 96", and 120" lengths. UL 10C positive pressure fire rated, air infiltration tested, and UL 4L10 listed — meeting NFPA 80 requirements for fire door pairs.

Features & Benefits

  • Profile Dimensions: 2" width × 1/8" height aluminum extrusion
  • Available Lengths: 84", 96", and 120"
  • Finishes: Clear Anodized Aluminum, Dark Bronze Anodized Aluminum, Galvannealed Steel
  • Fire & Code Compliance: UL 10C positive pressure fire rated, air infiltration tested, UL 4L10 listed
  • NFPA 80: Suitable for fire door pairs when installed per NFPA 80 requirements
  • Energy Performance: Seals door-pair gap to reduce air infiltration and HVAC load
  • Security: Eliminates the gap between door leaves, reducing pry-attack vulnerability
  • Acoustic: Reduces sound transmission between spaces
  • Warranty: 5-year manufacturer warranty

Technical Specifications

  • Model: 357
  • Material: Aluminum (Clear Anodized, Dark Bronze Anodized); Galvannealed Steel
  • Width: 2"
  • Height: 1/8"
  • Lengths: 84", 96", 120"
  • UL Listing: Air Infiltration Tested, Fire Rated UL 10C Positive Pressure, Underwriters Laboratory 4L10
  • Application: Commercial
  • Warranty: 5 Year

Typical Applications

  • Commercial office buildings and corporate campuses
  • Healthcare facilities and hospitals
  • Educational institutions
  • Government and municipal buildings
  • Retail and hospitality properties
  • Multi-family and mixed-use residential
  • Industrial and warehouse facilities

Note: When installing pairs of fire doors, care must be taken to maintain the requirements of NFPA 80.

Product Specs

Features:
When Installing Pairs of Fire Doors Care Must be Taken to Maintain the Requirements of NFPA 80
Warranty:
5 Year
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Astragals
Subcategory:
Astragals
Commercial/Residential:
Commercial
UL Listing Type:
Air Infiltration Tested, Fire Rated- UL10C- Positive Pressure, Underwriters Laboratory 4L10
Product Model:
357
Product Length:
84", 96", 120"
Product Dimension:
W: 2", H: 1/8"
Product Category:
Door Trim and Accessories
Product Substrate:
Aluminum
Department:
Door Hardware

Pemko 357C 84IN – Frequently Asked Questions

1) Will the Pemko 357 astragal work on a pair of fire doors?
The 357 T overlapping astragal is UL 10C positive pressure fire rated and Underwriters Laboratory 4L10 listed, so it can go on a fire-rated pair. The catch is the install: when you put an astragal on a pair of fire doors, the installation has to maintain the requirements of NFPA 80, which governs things like clearances and the fasteners you use. Rating the part and rating the opening are two different things, so follow NFPA 80 on the install and the pair stays compliant.
2) How much of the door face does a 2 inch overlapping astragal cover, and will it clear my exit device or lock trim?
The 357 profile is 2 inches wide and only 1/8 inch high, so it sits nearly flush on the door face and laps the gap between leaves. That 1/8 inch projection is the number that matters if you have surface trim near the meeting stile, since anything mounted on the inactive leaf within 2 inches of the edge will conflict with the astragal run. Measure from the leaf edge inward 2 inches on the face where it mounts.
3) Do I need an astragal on a pair of doors or will weatherstripping alone seal it?
Perimeter gasketing seals the head and jambs. It does nothing for the vertical gap where two leaves meet, and on a pair that gap is where you get the draft, the light leak, and the pry point. An overlapping astragal like the Pemko 357 is the piece that closes it, lapping from one leaf across onto the other. If you are gasketing a pair, you need both: weatherstrip the frame, astragal the meeting stiles.
4) Is there an astragal with a vinyl or neoprene seal instead of bare metal?
The Pemko 357 is a metal-to-metal overlapping profile with no gasket insert. If your opening needs a compressible seal at the meeting stile, the Cal-Royal EAST-501 is an aluminum T-astragal with a vinyl insert, and the NGP 109N is an overlapping astragal with a neoprene seal in an 84 inch length. A gasketed astragal gives you more forgiveness on an uneven pair; the bare metal 357 relies on the overlap itself and is the one that carries UL 10C positive pressure fire rating and air infiltration testing.
5) Is the Trimco 5001 or 5002 an alternative to the Pemko 357 overlapping astragal?
No, they solve different problems on the pair. The Pemko 357 is a full-height overlapping astragal in 84", 96", and 120" that runs the length of the meeting stile to close the gap between leaves. The Trimco 5001 is a stainless steel lock astragal for use with mortise or cylindrical locks, and the Trimco 5002 is a stainless steel lock astragal measuring 1-9/16" by 6" for use with cylindrical locks. Those are short pieces that guard the latch area at the lock, not a continuous seal for the full door height. If the goal is to block draft, light, and sound along the whole meeting stile, the 357 is the full-length part.
6) Is the Cal-Royal EAST-501 a substitute for the Pemko 357 astragal?
They serve the same opening but seal differently. The Pemko 357 is a solid 2" by 1/8" aluminum or galvannealed steel overlapping profile that closes the gap between leaves by metal overlap alone. The Cal-Royal EAST-501 is an aluminum T-astragal with a vinyl insert for double doors, so the sealing line at the meeting stile is a replaceable vinyl element rather than metal. On a fire door pair, note the 357 carries UL 10C positive pressure fire rating and UL 4L10 listing. If a maintenance crew wants a soft insert they can replace without pulling the extrusion, the EAST-501 is the T-astragal with that feature.
7) Which finish of the Pemko 357 astragal should I use on an exterior door pair?
All three finishes carry the same UL 10C positive pressure fire rating and air infiltration testing, so pick on appearance and substrate. Clear Anodized and Dark Bronze Anodized are aluminum, which is the usual choice on exterior openings and matches anodized storefront and frame finishes. Galvannealed Steel is the one to specify when you want a paintable surface or want the astragal to match hollow metal doors that get field-painted. Each finish is offered in all three lengths.
8) Can I standardize the Pemko 357 astragal across a whole building of double doors?
That is what it is built for. The 357 is a commercial-application astragal offered in one 2 inch profile across three finishes and three lengths, 84, 96, and 120 inches, so one part number family covers 7, 8, and 10 foot pairs in a facility. Because it is UL 10C positive pressure fire rated and 4L10 listed, the same profile works on your rated pairs and your non-rated ones, which means one spec line instead of two and one item on the stockroom shelf.
9) Which leaf does the Pemko 357 astragal mount to, the active or inactive door?
Surface-mount it on the inactive leaf so the 2 inch profile laps over onto the active leaf when the pair is closed. Running it on the active leaf would trap the inactive door shut. Mount holes are prepped in the extrusion for surface fastening, and on a rated pair the fastening has to follow NFPA 80.
10) What should I use instead of the Pemko 357 if I need a soft seal at the meeting stile for sound and smoke?
The Pemko 357 seals metal to metal with a 2" by 1/8" overlapping profile. If the specification calls for a compressible gasket at the meeting stile instead, the NGP 109N is an overlapping astragal with a neoprene seal supplied in 84" length for commercial doors. The tradeoff is length coverage: the 357 is available in 84", 96", and 120", so on 8-foot and 10-foot leaves it runs full height in one piece.
11) For a plain metal astragal with no gasket, how does the Pemko 357 compare to the NGP 139A?
Both are bare metal astragals with no insert. The NGP 139A is a solid metal astragal of anodized aluminum construction. The Pemko 357 is a 2" wide by 1/8" high overlapping profile offered in Clear Anodized Aluminum, Dark Bronze Anodized Aluminum, and Galvannealed Steel, in 84", 96", and 120". The 357 gives you a steel option and a dark bronze anodized option where the finish has to match existing bronze hardware or where a paintable galvannealed substrate is wanted, and it is UL 10C positive pressure fire rated and UL 4L10 listed for fire door pairs.
12) Which astragal covers a taller opening without splicing two pieces together?
The Pemko 357 overlapping astragal is stocked in 84", 96", and 120" lengths, so a 7-foot, 8-foot, or 10-foot leaf takes a single continuous piece in Clear Anodized Aluminum, Dark Bronze Anodized Aluminum, or Galvannealed Steel. Among the comparable overlapping astragals, the NGP 176A 84 is supplied at 84" and the NGP 109N with neoprene seal at 84", both sized to a standard 7-foot door. For a facility standardizing across mixed door heights, the 357 keeps one model number across all three.
13) Will an overlapping astragal stop the pry gap between double doors?
It closes the sightline. The 357 laps 2 inches of the face across the joint between leaves, so there is no open vertical gap to get a bar into at the meeting stiles, and it blocks the light and draft path at the same time. It is a surface-applied aluminum or galvannealed steel profile, not a locking device, so it hardens the gap rather than replacing the latching hardware on the pair.
How fast can I get the Pemko 357C 84IN 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 357C 84IN come with a warranty?
Absolutely. The Pemko 357C 84IN 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 357C 84IN?
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