Zero International 8878A 84" A...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$61.24
Zero International 8878A 84" Aluminum Door Gasketing with Snap-On Cover

Zero International 8878A 84" Aluminum Door Gasketing with Snap-On Cover

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Model: 8878A 84
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$61.24
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Zero International 8878A 84" Aluminum Door Gasketing with Snap-On Cover

Achieve elite architectural sealing and a flawless profile with the Zero International 8878A 84" Door Gasketing. Engineered for high-end commercial entries, hotel rooms, classrooms, and offices, this surface-mounted perimeter gasketing system provides heavy-duty weather, sound, and smoke protection without sacrificing aesthetics.

The standout feature of the 8878A is its multi-piece construction: it utilizes a high-grade aluminum housing that mounts directly to the frame, which is then capped off with a seamless snap-on aluminum cover. This completely conceals the installation screws, protecting them from tampering and ensuring a sleek, rivet-free architectural look.

Equipped with a flexible, high-recovery Silicone Ring Seal (Bulb), this perimeter gasket ensures low closing force while creating an airtight compression seal against drafts, moisture, exterior noise, and smoke. The Clear Anodized Aluminum finish (A) blends perfectly with standard silver or clear-coated aluminum storefront entries.

Key Features

  • Concealed Fasteners (Snap-On Cover): Features a sleek tamper-resistant aluminum beauty cover that snaps directly over the mounting base, hiding all screws for a beautiful, clean architectural appearance.

  • High-Performance Engineered Silicone Bulb: Equipped with a 0.250" silicone ring seal that compresses easily and returns to form perfectly. Excellent temperature resistance—won't become brittle in freezing cold or gummy in intense heat.

  • Elite Acoustic & Smoke Seal: Ideal for isolating room acoustics (STC rated) and blocking smoke transmission, making it perfect for office partitions, recording spaces, and commercial egress doors.

  • Heavy-Duty Architectural Construction: Extruded from 6063-T5 aluminum for exceptional durability against impacts in highly trafficked commercial spaces.

  • Clean Anodized Finish: The Clear Anodized (A) coating resists weathering, oxidation, and scratches, ensuring the perimeter stays professional-looking for years.

  • 84" Length for Standard Frames: Pre-cut at 84 inches (7 feet), making it the perfect size for standard commercial door jamb heights. It can be easily field-trimmed to exact dimensions.

Product Specifications

Attribute Specification
Brand Zero International (an Allegion Brand)
Model Number 8878A-84
Type Surface-Mounted Perimeter Gasket with Snap-On Cover
Material Extruded Heavy-Gauge 6063-T5 Aluminum
Finish Clear Anodized Aluminum (A)
Gasket Insert Type Silicone Ring / Bulb Seal (0.250" projection)
Profile Width 0.295" (Aluminum Base profile thickness)
Profile Height 0.875" (7/8" Total aluminum face width)
Length 84" (7 Feet)
Certifications UL10c Fire Rated, Smoke & Draft Control (Category H), Sound Rated
Fasteners Included TEK screws included (completely hidden after installation)

Manufacturer Resources

Zero Full Line Catalog

Product Specs

Commercial/Residential:
Commercial
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Gasketing
Department:
Door Hardware

Zero International 8878A 84 – Frequently Asked Questions

1) Will one piece of Zero 8878A cover a standard commercial door frame?
The 8878A comes pre-cut at 84 inches, which is 7 feet, so a single piece covers one jamb leg of a standard commercial opening. A typical frame needs two jamb pieces plus a head piece, so plan on more than one length per opening. It field-trims easily with a hacksaw or miter saw for the exact jamb height.
2) How much gap will the 8878A silicone bulb seal take up?
The silicone ring seal projects 0.250 inch, so it is compressing about a quarter inch of gap between the stop and the door face. The aluminum base itself is 0.295 inch thick with a 0.875 inch (7/8) face width, so measure your stop for that footprint before ordering. Silicone was chosen for recovery: it compresses at low closing force and springs back rather than taking a set.
3) Is Zero 8878A gasketing approved for a fire rated door?
Yes. The 8878A carries UL10c fire rating and is listed for Smoke and Draft Control, Category H, along with a sound rating. That combination is what a facility needs on rated corridor and stairwell openings where smoke leakage is inspected.
4) Silicone bulb, vinyl, brush, or magnetic seal - which perimeter gasket should I use?
The 8878A uses a silicone bulb, which holds up across temperature swings and is the type to pick for smoke and acoustic work on exterior or rated openings. If you want a lower-cost interior draft seal, the NGP 155V is a vinyl perimeter seal on a mill aluminum frame, and the Cal-Royal PG-601 is an aluminum channel with a vinyl insert. For a hollow metal frame where you want positive contact without compression drag, the NGP 159MA is a magnetic seal. A nylon brush seal like the NGP 602A is for sliding or high-cycle contact, not for sealing smoke.
5) Do I need to buy screws or anchors to install Zero 8878A gasketing?
TEK screws come with the gasketing, so for a hollow metal or aluminum frame you have what you need in the box. It is surface mounted to the frame face, meaning no routing or frame prep, but count your pieces per opening: two jambs and a head. Door bottom sealing is a separate item, this is perimeter only.
6) What is the closest equivalent to the Zero International 8878A perimeter gasketing from another brand?
The Zero 8878A is a surface-mounted perimeter gasket built from a 6063-T5 extruded aluminum housing with a silicone ring seal and a snap-on aluminum cover that conceals the mounting screws. The nearest peer by construction is the Cal-Royal PG-601, an aluminum channel perimeter gasketing that carries a vinyl insert rather than silicone. Both mount to the frame stop as a perimeter seal; the difference to confirm before you order is the insert material, since silicone holds its recovery across a wider temperature swing than vinyl and the 8878A's cover conceals fasteners while a plain channel leaves them exposed.
7) I need a perimeter seal that works in a walk-in cooler vestibule and unheated exterior entry. Is the 8878A the right choice or is there a better option?
The 8878A uses a silicone ring seal chosen specifically because it will not turn brittle in freezing cold or gummy in heat, which suits unheated and exterior openings. If you want a seal with a published temperature window on the label, the NGP 108NA is a neoprene sponge seal in an anodized aluminum frame rated for a temperature range of -20 F to 200 F. Neoprene sponge compresses softer than a silicone bulb, so it takes less closing force but compresses permanently faster under constant contact; the silicone bulb on the 8878A is a high-recovery profile intended for repeated cycling.
8) Is a brush seal a substitute for the 8878A on a smoke-rated door?
No. The NGP 602A is a nylon brush seal in an anodized aluminum housing, and a brush fill is a sweeping seal for dust, light, and air movement, not a compression seal. The 8878A carries a silicone bulb that compresses to an airtight seal and is specified for smoke and draft control on commercial egress doors. If the opening is smoke rated, the brush seal is not an exchange for it; use a bulb or sponge compression seal such as the 8878A or the NGP 108NA neoprene sponge seal.
9) For a sound-rated office or studio door, how does the 8878A compare to a magnetic seal?
The 8878A is a sound-rated silicone bulb perimeter gasket sold in an 84 inch length, which is the common jamb-leg height for commercial frames. The NGP 159MA is a magnetic seal in anodized aluminum, also offered at 84 inches; a magnetic seal pulls itself to a steel door face for positive contact with very low closing force, which is why it shows up on acoustic and studio openings. The magnetic version requires a ferrous strike surface on the door, so on an aluminum or fiberglass leaf the 8878A silicone bulb is the one that will seal.
10) Does the snap-on cover on the 8878A actually hide the screws?
It does. The aluminum housing mounts to the frame with the included TEK screws, then a separate snap-on aluminum cover presses over the base and conceals every fastener. That gives you a rivet-free face and keeps the screws out of reach in dorms, schools, and other openings where people pick at hardware.
11) Will the clear anodized finish on the 8878A match my aluminum storefront doors?
The A finish is clear anodized aluminum, which is the standard silver look on most aluminum storefront and clear-coated entrances, so it blends rather than contrasts. The anodizing also resists oxidation and scratching, which matters on a perimeter seal that gets brushed by every person coming through.
12) Is there an 84 inch anodized aluminum alternative if I want a different seal material?
The NGP 159MA is also sold in an 84 inch length with an anodized aluminum housing, using a magnetic seal instead of a silicone bulb. The NGP 108NA is another anodized aluminum framed option, running a neoprene sponge seal rated from -20 F to 200 F. Both are perimeter seals, but only the 8878A is listed here as UL10c fire rated with Category H smoke and draft control.
13) Will the 8878A stand up to heavy traffic in a hotel or school corridor?
The housing is extruded 6063-T5 aluminum, a structural architectural temper, not a thin roll-formed channel, so it takes cart and luggage impact without deforming. It is a commercial-duty product, and the concealed-fastener cover removes the loose screw heads that usually fail first on high-traffic openings.
14) Can I use the 8878A to cut sound between an office and a corridor?
Yes, it is sound rated and the silicone bulb makes a continuous compression seal around the perimeter, which is where most sound leaks on a door. It is used on office partitions, conference and recording spaces, classrooms, and hotel rooms. Pair it with a door bottom or automatic door bottom, since a perimeter seal alone leaves the undercut open and that will undo the acoustic work.
15) What is a simpler perimeter seal if I do not need the concealed snap-on cover?
The snap-on cover on the 8878A hides the TEK screws for a tamper-resistant, rivet-free face, which matters on lobby and storefront entries that are seen up close. Where appearance is not driving the job, the NGP 155V is a vinyl perimeter seal in a mill aluminum frame, a single-piece channel with the fasteners left exposed and a mill rather than anodized finish. Note that the 8878A is finished clear anodized to blend with silver and clear-coated aluminum storefront, so a mill frame will read differently against anodized jambs.
16) I am standardizing perimeter gasketing across a hotel. Which of these can I run on both the guest room doors and the back-of-house exterior doors?
The 8878A is a single profile that covers both duties: it is a commercial surface-mounted perimeter gasket carrying UL10c fire rating, smoke and draft control, and a sound rating, with a silicone bulb that handles exterior temperature swings and an 84 inch length that field-trims to the jamb. Among the alternatives, the NGP 108NA neoprene sponge seal is the other weather-oriented choice at -20 F to 200 F, while the NGP 602A nylon brush seal suits only dust and air movement on interior or utility doors. Running one silicone bulb profile across the property keeps the spare stock and the replacement insert to a single line item.
How fast can I get the Zero International 8878A 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 Zero International 8878A 84 come with a warranty?
Absolutely. The Zero International 8878A 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 Zero International 8878A 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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