Pemko 300 Series Adjustable As...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$104.62
$86.70
Pemko 300 Series Adjustable Astragal with Self-Adjusting Pile Brush for Double Doors

Pemko 300 Series Adjustable Astragal with Self-Adjusting Pile Brush for Double Doors

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Model: 300C84
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$104.62
$86.70
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Pemko 300 Series Adjustable Astragal with Self-Adjusting Pile Brush for Double Doors

Professional Double Door Sealing Solution

The Pemko 300 Series Adjustable Astragal features a spring-loaded, self-adjusting pile brush insert designed for double-door entryways with gaps of 3/8"; or less. This aluminum-based meeting stile mortises into one of two double active doors and provides comprehensive sealing against smoke, sound, light infiltration, and energy loss. Available in various finishes with custom cutting options from 24"; to 197"; maximum length.

Professional Features & Benefits

  • Gap Compatibility: Designed for double-door gaps of 3/8"; or less with flexible pile bristles that conform to surface irregularities.
  • Custom Length Options: Available from 24"; minimum to 197"; maximum length with custom cutting capabilities for precise installation fit.
  • Self-Adjusting Design: Spring-loaded mechanism automatically adjusts when doors shift, reducing maintenance requirements and ensuring consistent sealing performance.
  • Durable Aluminum Construction: Aluminum base material with overall height of 15/16"; provides long-lasting performance in commercial applications.
  • Comprehensive Sealing Performance: Prevents smoke, sound, light infiltration, drafts, dirt, and insects while improving energy efficiency and acoustics.
  • Easy Installation: Non-handed design mortises into one door of double active pairs using #4 x 1-1/4"; sheet metal screws.
  • Fire Safety Compliance: Helps prevent smoke spread in fire events while maintaining proper door operation.
  • Flexible Pile Bristles: Conform to surface irregularities and provide compressed sealing for optimal performance between double doors.

Technical Specifications

  • Department: Door Hardware
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Substrate: Aluminum
  • Product Type: Astragals
  • Series: 300 Series
  • Subcategory: Astragals

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 300 Series Adjustable Astragals deliver professional-grade sealing performance with durable aluminum construction and self-adjusting pile brush technology. The spring-loaded design reduces maintenance requirements while providing consistent sealing against smoke, sound, and energy loss. Engineered for demanding commercial applications where reliable double-door sealing is essential.

Product Specs

Department:
Door Hardware
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Substrate:
Aluminum
Product Type:
Astragals
Series:
300 Series
Subcategory:
Astragals

Pemko 300C84 – Frequently Asked Questions

1) Does a Pemko 300 astragal mount on both doors of a pair, or just one?
Just one. The 300 Series is a meeting stile that mortises into one leaf of a double active pair, and the pile brush bridges across to the face of the opposite door. It is non-handed, so you can put it on whichever leaf suits the hardware layout without ordering a left or right version. Fasten it with #4 x 1-1/4 inch sheet metal screws.
2) Should I use a brush astragal or an overlapping metal astragal on a pair of doors?
They solve different problems. A brush meeting stile like the Pemko 300 mortises into one leaf and seals with pile bristles, so both leaves stay independently operable and the bristles absorb doors that are slightly out of alignment. An overlapping astragal such as the NGP 176A or the NGP 109N with its neoprene seal laps over the gap from the face, which gives a more positive physical closure but forces a closing sequence on the pair. For a fire door pair where you need a solid metal lap, the NGP 139SP steel astragal with 3/4 inch overlap is the type to look at. Brush is the choice where you want smoke, light, sound, drafts and insect control without changing how the doors operate.
3) Can I use a Pemko 300 astragal where a lock or exit device is mounted on the meeting stile?
The 300 Series is a continuous brush meeting stile mortised into the door edge, so it wants a clear edge to run in. Where the pair has a mortise or cylindrical lock landing on the meeting stile, the astragal built for that condition is a lock astragal cut around the hardware, like the Trimco 5001 stainless lock astragal for mortise or cylindrical locks, or the Trimco 5002 at 1-9/16 by 6 inches for cylindrical locks. Use the brush stile on pairs where the edge is unobstructed and the lock astragal where hardware interrupts it.
4) What is the difference between the Pemko 300 Series adjustable astragal and the NGP 139A astragal?
The Pemko 300 Series is an aluminum meeting stile with a spring-loaded, self-adjusting pile brush insert that mortises into one leaf of a double active pair and seals gaps of 3/8 inch or less. The NGP 139A is a solid metal astragal of anodized aluminum construction, with no brush or flexible insert element. Both are aluminum astragals for double doors; the 300 Series closes the meeting gap with compressible pile, while the 139A is a solid section.
5) Is there a fire-rated astragal to use instead of a pile brush astragal on a rated pair?
The NGP 139SP is a steel fire-rated door astragal with 3/4 inch overlap coverage. It is the choice where a rated pair calls for a steel overlapping section, whereas the Pemko 300 Series is an aluminum mortised meeting stile with a pile brush insert that helps prevent smoke spread.
6) Will a Trimco 5001 or 5002 lock astragal do the same job as a Pemko 300 Series astragal?
No. 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 inch by 6 inch for use with cylindrical locks. Those are short pieces that address the lock area at the meeting point. The Pemko 300 Series is a full-height aluminum meeting stile with a pile brush that seals the length of the gap against smoke, sound, light, drafts, dirt, and insects.
7) How much will a mortised Pemko 300 astragal stick out past the door edge?
The extrusion has an overall height of 15/16 inch, and because it mortises into the door edge rather than surface mounting over the face, it does not add an overlapping lip that a door has to close over. That matters on a pair with panic hardware or a coordinator, where a face-applied overlapping astragal changes which leaf has to close first. A brush meeting stile like this keeps both leaves free to swing independently.
8) What finishes does the Pemko 300 astragal come in, and will it match my aluminum storefront doors?
Four finishes: clear anodized aluminum, dark bronze anodized aluminum, gold anodized aluminum, and mill finish extruded bronze. Clear anodized is the match for standard aluminum storefront, and dark bronze anodized lines up with the bronze anodized storefront framing most commonly paired with it. The mill finish bronze is a brass extrusion rather than anodized aluminum, so it reads warmer and will patina. Both 84 and 96 inch lengths are offered in all four.
9) Can I cut a Pemko 300 astragal down on site to fit my door height?
It is available cut to length from the factory anywhere from 24 to 197 inches, which is the cleaner route when the door height is non-standard. If you are trimming a stock 84 or 96 inch piece in the field, cut the aluminum extrusion and the pile to the same length and re-drill for the #4 x 1-1/4 inch sheet metal screws so the fastener spacing still lands in solid material.
10) I need a solid metal astragal instead of a brush type. What is the alternative?
For a solid metal meeting stile rather than a pile seal, the NGP 139A is a solid metal astragal in anodized aluminum, and the NGP 139SP is a steel version with 3/4 inch overlap coverage. A vinyl-insert T-astragal is another route, the Cal-Royal EAST-501 aluminum T-astragal with vinyl insert. The Pemko 300 is the choice when you want the seal to self adjust to a moving pair; the metal types are the choice when you want a rigid physical lap across the gap.
11) What double door astragal seals with a vinyl insert instead of a brush?
The Cal-Royal EAST-501 is an aluminum T-astragal with a vinyl insert for double doors. It is the alternative when a solid vinyl sealing element is preferred over the flexible pile bristles used in the Pemko 300 Series aluminum astragal.
12) What overlapping astragal covers the gap from the face of the door rather than mortising into the edge?
The NGP 176A is an overlapping astragal in anodized aluminum available in an 84 inch length, and the NGP 109N is an overlapping astragal with a neoprene seal in an 84 inch length. Both overlap the meeting point; the Pemko 300 Series instead mortises into one leaf of a double active pair.
13) Which double door astragal handles doors that shift out of alignment over time?
The Pemko 300 Series uses a spring-loaded mechanism that adjusts automatically when doors shift, with pile bristles that conform to surface irregularities. Fixed-section alternatives include the NGP 139A solid metal astragal in anodized aluminum and the Cal-Royal EAST-501 aluminum T-astragal with a vinyl insert.
14) What astragal comes in a length other than a standard 84 or 96 inch door height?
The Pemko 300 Series aluminum astragal is offered in 84 inch and 96 inch sizes and can be custom cut from 24 inches to a 197 inch maximum. The NGP 109N and NGP 176A overlapping astragals are cataloged at an 84 inch length.
15) Will the Pemko 300 astragal hold up on a high traffic pair of doors, or will the brush wear out?
The body is an aluminum extrusion, and the wearing part is the replaceable pile insert rather than the metal. Because the insert is spring loaded, it takes up movement as the leaves settle instead of the bristles being crushed against a fixed position, which is what shortens brush life on a static seal. For a property manager standardizing across a building, the same profile in one finish across every pair keeps the look consistent and the replacement part common.
16) What does an adjustable brush astragal actually stop between double doors?
Smoke, sound, light, drafts, dirt and insects. The pile bristles compress into the gap and conform to irregularities in the opposite door face, which is why it works on pairs that are not perfectly flat or perfectly aligned. On a commercial building it is doing two jobs at once: cutting the light and noise leak between spaces, and closing the path air takes through a pair of exterior doors.
17) Which astragal should be specified when a stainless steel finish is required at the meeting stile?
The Trimco 5001 and Trimco 5002 lock astragals are stainless steel. The Pemko 300 Series is aluminum based and is offered in clear anodized aluminum, dark bronze anodized aluminum, gold anodized aluminum, and mill finish extruded bronze.
How fast can I get the Pemko 300C84 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 300C84 come with a warranty?
Absolutely. The Pemko 300C84 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 300C84?
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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