Pemko S771 Self-Adhesive Astra...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$33.50
Pemko S771 Self-Adhesive Astragal Meeting Stile Seal 7/16"; x 9/32"; Fire Rated

Pemko S771 Self-Adhesive Astragal Meeting Stile Seal 7/16" x 9/32" Fire Rated

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Model: S771D8
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$33.50
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Pemko S771 Self-Adhesive Astragal Meeting Stile Seal 7/16"; x 9/32"; Fire Rated

Professional Sound Attenuation and Weatherization Solution

The Pemko S771 Self-Adhesive Astragal Meeting Stile Seal delivers professional-grade sound attenuation and weatherization for pairs of doors. This high-quality silicone seal measures 7/16"; wide by 9/32"; high and maintains flexibility between -58�F and 450�F with excellent resistance to compression set. Available in 7-foot minimum lengths up to 30-foot maximum lengths, the T-shaped seal provides Category H and J fire ratings with UL 10C certification for various door assemblies.

Professional Features & Benefits

  • Dimensional Specifications: 7/16"; width by 9/32"; height T-shaped profile designed for meeting stile and astragal applications on door pairs.
  • Extreme Temperature Performance: Maintains flexibility from -58�F to 450�F with high resistance to flex fatigue and low closing force requirements.
  • Fire-Rated Construction: Category H gaskets rated for steel frames and doors up to 3 hours, wood/composite doors up to 1.5 hours, and wood core doors for 20 minutes with UL 10C certification.
  • Self-Adhesive Installation: Pre-cut strips install easily with household scissors, requiring no mechanical fasteners and field-cuttable to required lengths.
  • Multi-Function Performance: Prevents heat loss, slows smoke passage, provides weatherization, and reduces interior and exterior noise transmission.
  • Professional Certifications: GREENGUARD Gold Certified, UL 1784 air leakage tested, ASTM E-283-04 and E90-2009 compliant, BHMA A156.22 certified.
  • Flexible Length Options: Available in lengths from 7-foot minimum to 30-foot maximum for various door configurations and project requirements.
  • Universal Door Compatibility: Suitable for glass, metal, or wood doors in single or double active configurations with non-handed installation.

Technical Specifications

  • Department: Door Hardware
  • Features: Low Closing Force; Prevent Heat Loss
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 7/16", H: 9/32";
  • Product Group: Door Trim and Accessories
  • Product Length: 7 FT
  • Product Model: S771
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Substrate: Aluminum
  • Product Type: Astragals
  • Subcategory: Astragals
  • UL Listing Type: Air Infiltration Tested; Intertek Testing (Warnock Hersey); Sound Tested- ASTM E90; BHMA Certified; Smoke Tested- UL1784; Fire Rated UL10C- Positive Pressure; Underwriters Laboratory 4L10; Greenguard Gold Certified

Professional Applications

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

Fire Rating Compliance

The S771 provides Category H gasket performance for steel frames and classified steel covered composite or hollow metal doors rated up to 3 hours, wood and plastic covered composite doors up to 1.5 hours, and wood core doors for 20 minutes without hose stream. Category J gasket ratings apply for similar door assemblies with equivalent time ratings, ensuring comprehensive fire protection compliance with UL 10C positive pressure fire testing.

Why Choose Pemko Quality?

Pemko astragal seals deliver professional-grade performance with high-quality silicone construction that withstands extreme temperatures from -58�F to 450�F and maintains low closing force requirements. GREENGUARD Gold certification and comprehensive UL testing including UL 10C positive pressure fire testing ensure reliable performance in demanding commercial applications. The combination of sound attenuation, weatherization, and fire rating capabilities makes this an essential component for professional door installations.

Product Specs

Features:
Low Closing Force; Prevent Heat Loss
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Astragals
Subcategory:
Astragals
UL Listing Type:
Air Infiltration Tested; Intertek Testing (Warnock Hersey); Sound Tested- ASTM E90; BHMA Certified; Smoke Tested- UL1784; Fire Rated UL10C- Positive Pressure; Underwriters Laboratory 4L10; Greenguard Gold Certified
Product Model:
S771
Product Length:
7'
Product Dimension:
W: 7/16", H: 9/32"
Product Substrate:
Aluminum
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Pemko S771D8 – Frequently Asked Questions

1) Will the Pemko S771 astragal seal work on a pair of fire rated doors?
Yes, and the rating depends on what the doors are made of. The S771 silicone seal carries Category H and J gasket ratings under UL 10C positive pressure: up to 3 hours on steel frames and steel covered composite or hollow metal doors, up to 1.5 hours on wood and plastic covered composite doors, and 20 minutes on wood core doors without hose stream. It is also smoke tested to UL 1784 and BHMA certified.
2) How much space does the S771 meeting stile seal need between a pair of doors?
The S771 is a T-shaped silicone seal measuring 7/16 inch by 9/32 inch, so it needs a meeting stile gap that the 9/32 inch height of the bulb can bridge under compression. It is non-handed and mounts on glass, metal, or wood doors in single or double active configurations. If your gap between leaves is much wider than that, an overlapping metal astragal such as the NGP 176A is the part that covers the joint instead.
3) Does the Pemko S771 astragal seal need screws or mechanical fasteners to install?
No fasteners. The S771 is self-adhesive, so the strip presses onto the meeting stile with no drilling and no screws. It cuts to length with household scissors in the field, which is why it works as a retrofit on doors already hung.
4) Will a silicone door seal hold up in an unconditioned warehouse or a boiler room?
The S771 silicone stays flexible from -58F to 450F and resists compression set and flex fatigue, so it does not go hard in a cold loading dock or slump in a hot mechanical space. It also keeps closing force low, which matters on openings that have to stay ADA-friendly to push.
5) Is the Pemko S771 a sound seal or just a weather seal?
Both. The S771 is sound tested to ASTM E90 and air infiltration tested to ASTM E-283-04, so it is used to cut noise transfer through the meeting stile of a pair as well as to stop drafts and heat loss. On an office or exam room pair, the meeting stile is usually the leak path that undoes everything else you sealed.
6) What is the difference between the Pemko S771 seal and a metal astragal like the NGP 139A?
Two different parts for the same joint. The S771 is a self-adhesive silicone T-seal, 7/16 by 9/32 inch, that sticks to the face of the meeting stile and compresses when the leaves close. A solid metal astragal like the NGP 139A anodized aluminum or the NGP 139SP steel fire-rated astragal is a rigid bar that screws on and physically overlaps the gap, giving security and a hard stop as well as a seal. Pick the S771 when you want gasketing on an existing pair without machining; pick a metal astragal when the joint needs a covered, fastened overlap.
7) Is there a fire rated astragal seal that meets green building or indoor air quality requirements?
The Pemko S771 is GREENGUARD Gold Certified alongside its UL 10C fire rating, which is the certification specifiers look for on schools and healthcare projects chasing low chemical emissions. It is also Intertek (Warnock Hersey) tested and BHMA certified, so it clears the usual institutional submittal checklist without a separate product for the green requirement.
8) I need an astragal that works with a mortise or cylindrical lock on the inactive leaf. Is the Pemko S771 the right part?
No. The S771 is a compression gasket with no cutout for lock hardware. If the astragal has to clear a mortise or cylindrical lock, use a lock astragal instead: the Trimco 5001 stainless steel lock astragal is made for mortise or cylindrical locks, and the Trimco 5002, at 1-9/16 by 6 inches, for cylindrical locks. The S771 handles sealing, not lock coverage.
9) Do I need a different S771 seal for a left hand versus right hand door?
No. The S771 is non-handed, so one part number covers either leaf of a pair and either swing. That makes it straightforward to standardize across a building: order 7 foot or 8 foot in one color and stock it for every pair, rather than carrying handed parts.
10) Can the Pemko S771 be used on a single door instead of a pair of doors?
Yes. Although the S771 is built for the meeting stile of door pairs, it is rated for single or double active configurations on glass, metal, or wood doors, and being self-adhesive and field-cuttable there is no prep involved in running it down a jamb or head. Note that it is sold in 7 foot and 8 foot lengths, so a single opening usually gets one strip cut down.
How fast can I get the Pemko S771D8 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 S771D8 come with a warranty?
Absolutely. The Pemko S771D8 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 S771D8?
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 S771D8 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.
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