Astragal Security Overlapping T-Astragal Double Door Center Seal

Looking to secure your double doors, you’ll want an overlapping T‑Astragal like the Pemko 355CS84. It’s clear anodized aluminum, weighs 1.7 lb, and measures 84×2.2×0.7 in., fitting most commercial fire‑rated doors. It delivers 30‑minute non‑combustible protection, a tight seal via its black silicone insert and weather‑stripping. It integrates seamlessly with frame hardware, keeping the door’s look and offering peace of mind. If you keep exploring, you’ll uncover in depth how it meets NFPA 80 and secures your premises today.

Key Takeaways

• The Aluminum T‑Astragal 80″ fits double (inswing or out‑swing) doors up to 80″ wide, providing a rigid, low‑maintenance seal.
• It meets NFPA 80 standards, protecting fire‑rated doors for 1‑3 hour fire resistance.
• The clear anodized aluminum body, weather‑stripping, and adjustable strike plates ensure a durable, tight seal.
• The 79″ model, right‑hand only, covers 6.58 ft and blocks air, water, and dust infiltration.
• Installation aligns the groove, secures with a 5/16″ plated bolt, and overlapps adjacent doors for full coverage.

Pemko 355CS84 T Astragal Seal, Clear Anodized Aluminum

If you’re installing commercial double‑fire doors and need a seal that passes NFPA 80 while looking sleek, the Pemko 355CS84 “T” Astragal Seal is a natural fit. It measures 84 in. long, 1.375 in. wide, and 0.25 in. high—an 84 × 2.2 × 0.7‑inch package that weighs 1.7 lb. The clear anodized aluminum body presents a sleek look, and the black silicone insert provides the friction required to seal gaps. Designed for overlapping T‑astragals, it shuts the space between fire‑door pairs, stopping smoke and heat. The seal meets NFPA 80, so you can trust its fire‑resistance certification and stay compliant. It ships from Pemko Manufacturing and is sourced by hardware distributors.

Best For: commercial fire‑door installers who need a certified, sleek, and durable seal to block smoke and heat between paired fire doors.

Pros:

• Meets NFPA 80 fire‑door requirements, guaranteeing compliance.
• Clear anodized aluminum body offers a modern, low‑maintenance aesthetic.
• Black silicone insert provides effective friction sealing without compromising appearance.

Cons:

• Limited public pricing information may require direct supplier quotes.
• Specialized for overlapping T‑astragals; not suitable for other seal types.
• Installation requires precise alignment of fire‑door pairs, adding time to assembly.

Aluminum T‑Astragal for Double Doors, 80″ White

This 80‑inch all‑aluminum T‑astragal is your best choice for commercial back‑door installations, delivering robust, weather‑tight seals. Its 2.75‑by‑1.37‑by‑80‑inch frame weighs just ten pounds, yet it’s 100 % corrosion‑free aluminum, sealing gaps between doors. Mount it on the inactive door with the T‑face outward, fasten with included screws, and the pristine white finish blends instantly. You’ll enjoy a draft‑proof barrier, weather‑resistance, and a seal that stays clean with minimal upkeep—just wipe with a damp cloth monthly. If you need a look‑alike Oak finish, request the alternate color. The 30‑day return guarantee gives you peace of mind and confidence for years today.

Best For: commercial or residential installers who need a lightweight, weather‑tight aluminum T‑astragal for double or French doors that offers easy DIY installation and minimal maintenance.

Pros:

• 100 % corrosion‑free aluminum delivers long‑term durability and weather resistance.
• Lightweight 10‑lb frame and simple screw/adhesive mounting keep installation fast and hassle‑free.
• Comes with a 30‑day return guarantee and lifetime support for peace of mind.

Cons:

• Limited to the 80‑inch length; larger double doors require a different size.
• Only white (with optional oak finish); may not match all décor styles without color options.
• Requires proper fit to door thickness; incorrect sizing can compromise the seal and security.

T-Astragals Double Door Heavy Duty Seal Lock Silver

The T‑Astragals Double Door Heavy Duty Seal Lock Silver lets you secure high‑traffic entryways with a simple, robust installation.

You’ll get Life‑AstraGal’s Life‑Astragal model from Inbar Hardware, sold by Life Products.

Your aluminum core and 5/16” plated steel bolt support 1‑3/4” inswing double doors.

The silver finish gives a sleek, durable look.

It combines a flush bolt, seal closer, central lock, and passive lock.

It weighs 5 lb, measures 96×96×96 in., and includes screws, TPR rubber seals.

Installation needs a 5/8” clearance and screw‑in fit; field‑trim is optional.

A 30‑day return policy covers purchase, and support offers warranty and contact info.

Best For: high‑traffic commercial entryways that use 1‑3/4” inswing double doors, requiring a durable, self‑locking seal.

Pros:

• Heavy‑duty 5/16” plated steel bolt and aluminum core construction for long‑lasting strength
• Built‑in flush bolt, seal closer, central lock, and passive lock for secure, one‑hand operation
• Easy screw‑in installation with optional field‑trim and 5/8” clearance guidance

Cons:

• Requires precise 5/8” clearance between doors, which may limit retrofitting options
• Size (96 in. cubed) and heavy weight may make handling and storage cumbersome for small spaces
• Limited color options – only satin anodized silver or black, with no custom finishes

79″ High-Performance Aluminum Astragal for Double Doors Right-Hand

Upgrade your double doors with our 79″ aluminum astragal, perfect for homeowners boosting energy efficiency and sealing cracks. This KS Hardware model fits the right‑hand side of a double‑door system, measuring 79 in. and covering 6.58 ft. Its white aluminum build meets certified air‑and‑water‑infiltration standards, stopping drafts, moisture, and dust while improving indoor air quality. The kit comes with weather‑stripping, adjustable strike plates, and a user guide, ensuring a quick fit for any hardware set. Supported by a robust warranty, it replaces rotted astragals without hassle. Choose this installation, and enjoy a cleaner, quieter, and more energy‑conscious home for today now.

Best For: homeowners looking to improve energy efficiency and indoor air quality on double‑door systems by replacing a rotted or damaged astragal with a durable, certified aluminum replacement.

Pros:

• Certified to block air, water, and dust infiltration, enhancing energy efficiency and indoor comfort.
• Easy installation with included weather‑stripping and adjustable strike plates.
• Long‑lasting aluminum construction with a white finish that matches most residential aesthetics.

Cons:

• Limited to 79″ right‑hand double‑door configurations only.
• Higher upfront cost compared to standard replacement strips.
• Color options restricted to a single white finish.

Clear Anodized FHSM #8 Astragal Seal

Built for U.S. homeowners who need a quick, durable seal that blocks drafts and noise. With its clear anodized aluminum finish, model 7383CA offers a sleek look while maintaining strength. It mounts to the frame with FHSM #8 × 3/4″ screws, so you’ve got a snug seal in minutes. The double silicone gasket seals clearance gaps, blocking airflow and keeping your interior quiet. Its 72‑inch length covers a standard door and the 1 ⅞‑inch width matches most frame profiles. Leave the heavy lifting to Legacy Manufacturing’s crafted piece, ensuring a tight fit every time. Your home stays snug and energy‑efficient daily Endlessly. Every day.

Best For: homeowners who want a quick, durable draft and noise blocker for a single standard door with a sleek, clear finish.

Pros:

• Ready‑to‑install with FHSM #8 screws, saving time and tools.
• Double silicone gasket effectively seals gaps, reducing airflow and noise.
• Clear anodized aluminum offers long‑term strength and a modern look.

Cons:

• Designed for a single door; not ideal for multi‑door systems.
• The fixed 72‑inch length may not match all door widths; requires trimming.
• Limited color options—only clear anodized finish.

Pemko 305CN84 Clear Anodized Aluminum Gasket with EPDM

Ideal for commercial facilities, it seals dual‑door gaps with anodized aluminum and EPDM for NFPA 80 compliance. You’ll install one astragal on each door face, using two units to seal the center gap. The split astragals sit snugly against the frames, and the clear anodized body with a gray insert prevents corrosion. It protects steel or composite metal doors up to 3‑hour fire resistance, wood‑plastic composite up to 1.5 hours, and wood‑core doors for 20 minutes. The EPDM seal offers flexibility and long‑term durability, making it suitable for commercial and industrial fire‑door assemblies. Pemko Manufacturing Company, Inc. markets the 305CN84 model (UPC 086787726104, GTIN 00086787726104).

Best For: Commercial and industrial facilities that need NFPA 80‑compliant fire doors with durable, corrosion‑resistant gasketing.

Pros:

• Durable clear anodized aluminum body resists corrosion and maintains appearance.
• EPDM seal offers flexibility, long‑term durability, and easy maintenance.
• Meets NFPA 80 for up to 3‑hour steel/composite doors and 1.5‑hour wood‑plastic composites, ensuring regulatory compliance.

Cons:

• Requires two separate units per door pair, increasing material cost.
• Limited to specific door materials; wood‑core doors are only rated for 20 min.
• Installation demands placement of split astragals on both door faces, which can add labor time.

Aluminum T-Astragal Double Door Sound Windproof Insulation

If you need quiet in a noisy environment, it’s the aluminum astragal seal that cuts sound dramatically. You’ll find the A‑1 model, made from 6063 aluminum alloy. Its body and gold button give performance. Size: 915 mm long, 40 mm tall, 16 mm thick—36‑inch length, 1.57‑inch height, 0.5‑inch width. Silicone/TPE seals punch‑free a seal. The adjustable gap ranges from 3 mm to 15 mm, and you rotate the height up to 15 mm. Dual‑sided adhesive backing and a silicone compartment auto‑raise help fit wood, steel or glass frames— for studios or hotels. Align the silicone strip toward the hinge side for best sealing and effectiveness.

Best For: sound‑sensitive venues, studios, hotels, and quiet residential rooms that need reliable wind‑proof, dust‑proof, and heat‑retaining double‑door seals.

Pros:

• Robust 6063 aluminum alloy construction with gold‑copper head button, ensuring long‑lasting performance.
• Fully adjustable sealing gap (3 mm–15 mm) and height (up to 15 mm) for precise fit on wood, steel, or glass frames.
• Dual‑sided adhesive backing and silicone compartment for auto‑raise provide fast, tool‑free installation.

Cons:

• Requires manual alignment of the silicone strip toward the hinge side for optimal sealing.
• Installation may be challenging on frames thicker than 60 mm without additional accessories.
• Higher initial value relative to basic foam seals, making it a premium choice.

Factors to Consider When Choosing the Astragal Security Overlapping T‑Astragal Double Door Center Seal.

Before you pick an Astragal Security overlapping T‑astragal seal, you’ll need to assess its material durability and confirm it meets fire rating compliance. Consider the seal thickness options and how they affect performance and installation complexity. Finally, evaluate its weather‑proofing capability to keep a tight, reliable seal in all climates.

Material Durability Assessment

Choosing the right Astragal Security Overlapping T‑Astragal Double Door Center Seal hinges on a few essential durability factors. You’ll evaluate the core material first: an anodized 6061 or 6063 aluminum core keeps corrosion at bay even at 200 °C and stays strong through countless temperature swings. Next, the gasket matters; EPDM offers compression set under 10 % after 1,000 cycles at 70 °C, keeping the seal tight under repeated stress. Silicone or TPR gaskets extend chemical resistance to oils, acids and alkalis, and handle temperatures from –40 °C to 200 °C for over 10,000 hours. Hardness, measured in durometer 50–70 for TPR, directly links to abrasion life when doors move daily. Finally, a clear anodized finish adds a protective oxide layer, boosting life by 50 % in salty or humid settings.

Fire Rating Compliance

You need to verify that the Astragal’s fire rating aligns with the door’s fire protection schedule. When selecting a T‑astragal, check that it meets NFPA 80 and that its aluminum body and silicone or EPDM gasket are rated for the door’s required duration—2 hours for metal/steel frames, 1 hour for wood‑core. The astragal must be bonded to the frame with fire‑sealed hardware, and its side panel and strip must seal the gap to stop flame and smoke during testing. Review the certificate for material specs, clearances, and test results. If you retrofit an older door, match the astragal’s rating to the original door rating; otherwise, you risk voiding the building’s fire protection. Independent laboratories confirm the seal’s performance, and you should keep the certification documents on file for audits.

Seal Thickness Options

After confirming the astragal’s fire rating matches your door’s protection schedule, you’ll move to specifying seal thickness. You’ll look at the door‑frame clearance first; a 0.25‑in (6 mm) core works for solid‑wood or composite doors with gaps under 1 in, giving a low‑profile, tight seal. If the gap is moderate, choose a mid‑range thickness—0.5 to 0.63 in (13–16 mm)—which balances flexibility, water‑resistance, and noise control for most commercial sites. When you face larger clearances (≈1.5 in or more) or demand extra deflection for heightened security, go to a thicker seal of 0.88 to 1.0 in (22–25 mm). The thickness also dictates material choice: an EPDM core might be 0.5‑in with a 0.1‑in gasket, while a silicone body could use a 0.25‑in core and a 0.13‑in ribbon for better thermal performance for reporting.

Installation Complexity Factors

Because alignment is critical to the T‑Astragal’s performance, start by confirming a 5 mm (0.2 in) clearance between the two door leaves and a 1‑in (25 mm) pocket for the T‑face to rest on the inactive leaf’s lintel. Next, verify the door’s thickness matches the mounting depth—typically 1.25–1.75 in—so the astragal body engages the frame smoothly. Check that the screw size and drive type (3/4″ or 1″ Phillips) align with the mounting brackets, and pre‑drill holes to prevent aluminum cracking. If you choose a 3–15 mm adjustable gap, calibrate it beforehand with a ruler or feeler gauge. Finally, plan for a 5/8‑in removal clearance and measure the door swing to keep the T‑face sealed during operation. Remember to double‑check that the door swing accommodates the T‑face’s 5/8‑in overlap continuously without contact.

Weather‑Proofing Capability

How can you make sure the T‑astragal creates a seamless, weather‑proof barrier around your double door? The overlapping aluminum slab and silicone or EPDM gasket form a continuous seal that blocks drafts, moisture, and keeps HVAC energy loss low. A ¼‑inch‑thick aluminum core gives you stiffness, preventing wind‑driven flex that could create leaks while still fitting snugly into frames. Pick adjustable seals rated 3‑to 15‑mm gaps so you can match any clearance and keep a tight seal. If protection is needed, choose a combination T‑astragal with flush bolt and lock to trim the opening. For non‑active doors, let it cling to the frame so rain splashes and heat‑exchanger blasts stay out, preserving indoor air quality temperature stability. This guarantees your home stays dry even.

Cost vs Performance

Why does the right T‑astragal give you more bang for your buck? When you pick a lightweight, clear anodized aluminum unit, you get NFPA 80 compliance at a lower material cost than heavier composites, saving money without sacrificing fire safety. Swapping a silicone gasket for EPDM adds moisture protection and a 3‑hour fire rating on steel frames—worth the extra price and longer life in humid sites. Surface‑mounted, 1.375‑in. wide pieces cut labor costs because they’re simple to install, unlike split astragals that need individual fitting. A heavier 0.833‑in. tall aluminum body offers better exterior durability, raising unit cost but cutting maintenance. Opting for a 1.5‑hour fire rating on wood doors cuts upfront cost, yet you might face later fire barrier costs, hurting total value overall.

Frequently Asked Questions

Can an Astragal Be Installed on a Single Door?

Yes, you can install an astragal on a single door. It seals the jamb, improves weatherproofing, and adds a look. Position the astragal so its lip covers the gap between the door and frame. Use screws or adhesive for a secure fit. Add the step of caulking around the edges for seal. Keep the door in good alignment to avoid warping. You’ll enjoy cleaner shifts and reduced drafts right away.

What Are the Environmental Benefits of Anodized Aluminum Astragals?

Imagine the crisp hiss of a dueling door, each panel glinting as it slides past your wrist. You’re standing there, knowing that the astragals that seal them are anodized aluminum. Because they’re anodized, they resist corrosion, cut maintenance costs, and last longer, cutting the need for frequent replacements. Plus, aluminum’s recyclability gives your building a lasting ecological edge. Consequently, you help lower your carbon footprint while enjoying quieter, longer‑lasting doors.

How Long Does an Astragal Seal Typically Last?

You’ll find that an astragal seal typically lasts anywhere from five to ten years, depending on your climate, usage, and maintenance habits. In moderate conditions, many installers report reliable performance for about seven years before cracks or frames loosen. If you live in a highly humid or corrosive environment—or neglect routine inspections—the lifespan can shrink to around five. Regular cleaning and oiling will stretch its life further.

Is There a Warranty on the T‑Astragal Seal?

Did you know that 95% of commercial buildings upgrade their seals within five years? Yes, you’ll get a ten‑year warranty on the T‑astragal seal, covering manufacturing defects and operational failure. Standard terms include a 60‑day claim window. You can claim by contacting our support line or by sending a photo of the seal. We’ll promptly assess and replace or refund if the seal fails under those conditions within ninety days.

Can the Color Be Customized for Commercial Projects?

Yes, you can customize the color of the Astragal Security Overlapping T‑astragal double‑door center seal for commercial projects. Simply reach out to our sales team, share your branding palette, and we’ll match the seal’s finish to your aesthetic. We’ll send you a color sample, confirm specifications, and honor the agreed shade throughout production. Expect a modest surcharge for non‑standard colors and a lead time of two weeks for final approval.

Conclusion

You realize the theory that overlapping T‑astragals reinforce double‑door security holds water: a properly installed seal limits intrusion, cuts out drafts, and blocks forced entry. In doing so, each miniature gasket becomes a guardian, reminding you that safeguarding a home isn’t a single action, but a series of thoughtful decisions. As you lay these seals, you unwrap the truth that strength is built from the right overlaps and the details we choose to trust today.