Zero International 8042S Black...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$43.50
$37.59
Zero 8042S Black Double Fin Silicone Self-Adhesive Weatherstripping

Zero International 8042S Black Double Fin Silicone Self-Adhesive Weatherstripping with Fire-Rated Smoke and Draft Control

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Model: 8042SBK204

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

$43.50
$37.59
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Zero International 8042S Black Double Fin Silicone Self-Adhesive Weatherstripping with Fire-Rated Smoke and Draft Control

Zero International, an Allegion brand recognized as the standard for quality in door sealing hardware, presents the 8042S Black Double Fin Silicone Self-Adhesive Weatherstripping. Engineered for commercial door applications, this weatherstripping is fire-rated to UL10C with positive pressure performance and has been tested for smoke and draft control, making it a dependable choice for code-compliant openings. Constructed with a double fin silicone design in black and equipped with 3M self-adhesive tape for straightforward application, it also carries sound seal and air seal ratings and meets ANSI/BHMA R0E154. On special order, the ZAG (Zero Anti-Ligature Gasketing) feature is also available for applications requiring anti-ligature protection.

Key Features

  • Fire-Rated Performance: UL10C listed with positive pressure rating for use in fire-rated door assemblies.
  • Smoke and Draft Control: Tested for smoke and draft control to help maintain a sealed, code-compliant opening.
  • Double Fin Silicone Construction: Black double fin silicone design provides a durable, flexible seal along the door edge.
  • Self-Adhesive Installation: Equipped with 3M self-adhesive tape for simplified, mess-free mounting without additional fasteners.
  • Sound Seal Rated: Helps reduce sound transmission through the door opening for improved acoustic control.
  • Air Seal Rated: Provides an effective air infiltration barrier to improve energy efficiency at the door.
  • ANSI/BHMA R0E154 Compliance: Meets recognized industry standards for door sealing hardware performance.
  • Optional ZAG Feature: Available on special order in Zero Anti-Ligature Gasketing configuration for specialized security and safety applications; contact sales for details.

Certifications & Compliance

  • UL10C Fire-Rated – Positive Pressure
  • Smoke and Draft Control Tested
  • ANSI/BHMA R0E154

Technical Specifications

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

Typical Applications

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

Why Zero International 8042S?

Zero International weatherstripping products deliver professional-grade sealing performance backed by UL10C fire rating, positive pressure testing, and smoke and draft control certification. Built with durable double fin silicone construction and convenient 3M self-adhesive application, the 8042S is engineered for demanding commercial door applications where code compliance and reliable sealing performance are essential.

Product Specs

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

Zero International 8042SBK204 – Frequently Asked Questions

1) Will Zero International 8042S weatherstripping keep a fire-rated door assembly compliant?
The 8042S silicone fin gasketing is UL10C listed with a positive pressure rating, so it's built for use in fire-rated door assemblies. It has also been tested for smoke and draft control, which is the separate requirement that comes up on smoke barrier and corridor openings in healthcare and multi-family work. It meets ANSI/BHMA R0E154 as well. If your spec calls for a gasket on a positive pressure fire door plus an S-label smoke seal, this one covers both in a single product.
2) How does the Zero 8042S mount, and do I need to drill the frame?
No drilling and no fasteners. The 8042S comes with 3M self-adhesive tape on the back and presses onto the stop face of the frame. That makes it the fast option on occupied buildings, retrofit work, and hollow metal frames you don't want to punch holes in. Zero publishes install instructions for the 8042 at https://zensupply.com/content/pdf/zero-international/zero-8042-install-instructions.pdf. Note that adhesive-mount gasketing needs a clean, dry, degreased stop surface to hold, unlike the screw-applied aluminum-housed seals it competes with.
3) What length of Zero 8042S do I need to gasket one standard door opening?
The 8042S is sold in continuous coils of 17 feet (204 inches), 19 feet (228 inches), 21 feet (240 inches), and 25 feet (300 inches). You cut it to length on site. Work out your run as head plus both jambs: a typical 3070 single opening needs roughly 3 feet across the head and 7 feet down each jamb, so the 17 foot coil covers one opening with a little spare. A pair of doors, or several openings on the same floor, is what the 21 and 25 foot coils are for.
4) Adhesive silicone fin gasket or an aluminum-housed perimeter seal, which should I use?
Two different install jobs. The 8042S is a bare silicone double fin with 3M tape, so it goes on with no screws and no housing, which suits retrofit and occupied openings. An aluminum-retainer seal like the Cal-Royal PG-601 aluminum channel perimeter gasketing with vinyl insert, the NGP 155V vinyl perimeter seal with mill aluminum frame, or the NGP 108NA neoprene sponge seal with anodized aluminum frame screws to the stop and gives you a rigid channel plus a replaceable insert, which is what most institutional specs want on high-abuse openings. If the requirement driving the job is the fire label and smoke and draft control, the 8042S is the one carrying UL10C with positive pressure.
5) What is the difference between Zero International 8042S silicone weatherstripping and the NGP 155V vinyl perimeter seal?
Both are perimeter seals for commercial door frames, but they differ in sealing material and mounting. The Zero 8042S uses a double fin silicone seal in black with 3M self-adhesive tape, so it goes on the stop face without fasteners, and it is UL10C fire-rated with positive pressure plus smoke and draft control testing. The NGP 155V is a vinyl perimeter seal carried in a mill aluminum frame, so it is a housing-and-insert design that mounts to the frame as a rigid channel. Choose the 8042S when the opening is a fire-rated or smoke-rated assembly and you want an adhesive-applied silicone fin; choose the 155V when you want an aluminum-framed vinyl seal on the jamb.
6) What should I use instead of Zero 8042S weatherstripping at the bottom of the door?
The 8042S is a perimeter seal applied along the door edge with 3M self-adhesive tape, so it addresses the head and jambs rather than the sweep line at the sill. For the bottom condition, the Cal-Royal PG-601 is an aluminum channel perimeter gasketing with a vinyl insert from the Door Shoes Series, which is the family that handles the shoe at the door bottom. On many commercial openings both get specified together: silicone fin gasketing around the perimeter and a shoe at the bottom edge.
7) Can I use the NGP 602A brush seal in place of Zero 8042S silicone gasketing on a fire door?
They are not interchangeable on a rated opening. The NGP 602A is a nylon brush seal in an anodized aluminum housing, a filament seal built to sweep against the door face. The Zero 8042S is a double fin silicone seal that is UL10C fire-rated with positive pressure and tested for smoke and draft control, and it also carries sound seal and air seal ratings. When the opening is a fire-rated assembly needing smoke and draft control, specify the 8042S. The brush seal suits openings where a nylon filament seal in an aluminum housing is what the job calls for, such as dust or light-gap control.
8) Can I use the Zero 8042S on the bottom of the door to stop drafts under it?
No. The 8042S is perimeter gasketing for the head and jambs, where the door closes against the frame stop. The gap under a door is a different part: you need a door bottom, sweep, or door shoe for that, and a threshold to seal against. Buy the 8042S for the three sides of the frame and handle the sill separately.
9) Will the Zero 8042S help with noise between rooms and air leakage?
Both are rated on this gasket. The 8042S carries a sound seal rating and an air seal rating, which is what the double fin does for you: two lines of contact instead of one. For property managers chasing tenant noise complaints or drafty corridor doors, that's the practical reason to pick a fin seal over a single-bulb gasket. Sealing the perimeter alone won't finish the job if the undercut is still open.
10) Is Zero 8042S weatherstripping suitable for exterior doors and cold climates?
Silicone is the reason to pick it. The 8042S uses a silicone fin rather than vinyl or neoprene, and silicone holds its flexibility across a wider temperature swing, so it doesn't stiffen and stop sealing in winter the way a vinyl insert can. It's specified for commercial openings. If you want a stated temperature range on paper for an extreme location, the NGP 108NA neoprene sponge seal is rated -20 F to 200 F.
11) Can I get Zero 8042 gasketing in an anti-ligature version for a behavioral health unit?
Yes, as a special order. Zero offers the ZAG (Zero Anti-Ligature Gasketing) configuration for applications needing anti-ligature protection. It isn't a stock option on the standard 8042S coil, so it has to go through sales as a special order. If you're doing patient rooms or holding cells, specify ZAG up front rather than ordering standard gasketing and trying to swap it later.
12) What seals a metal door against a metal frame better, a silicone fin gasket or a magnetic seal?
A magnetic seal like the NGP 159MA, supplied in 84 inch anodized aluminum lengths, pulls itself tight to a steel door and generally gives the tightest acoustic and air seal, but it only works if the door face is ferrous and it needs a screw-applied housing. The Zero 8042S double fin silicone works on any door material, goes on with 3M tape, and is the one that carries UL10C positive pressure plus smoke and draft control. On a fire or smoke-rated opening, the rating usually decides it.
13) Which perimeter seal installs without drilling the frame, the Zero 8042S or an aluminum-framed seal?
The Zero 8042S mounts with 3M self-adhesive tape, so it applies to the stop without fasteners and without drilling. The aluminum-framed alternatives are housing-mounted products: the NGP 155V is a vinyl perimeter seal in a mill aluminum frame, the NGP 108NA is a neoprene sponge seal in an anodized aluminum frame, and the Cal-Royal PG-601 is aluminum channel gasketing with a vinyl insert. Those channel types are the direction to go when a rigid frame anchored to the jamb is preferred over an adhesive-applied fin, for example on a high-traffic opening where the seal takes repeated contact.
14) I need one gasket type across a whole building of commercial openings. Does Zero 8042S or a fixed-length seal standardize better?
The Zero 8042S is supplied in coil lengths of 17 feet, 19 feet, 21 feet, and 25 feet, which is enough to cut the head and both jambs of a standard opening from one length and repeat it across the building, and it is UL10C fire-rated with positive pressure, smoke and draft control tested, and meets ANSI/BHMA R0E154, so the same part serves rated and non-rated doors. A fixed-length alternative such as the NGP 159MA magnetic seal is supplied in an 84 inch length, which sets the piece size for you rather than letting you cut to the opening.
15) Do I have to order the Zero 8042S in black, or are there other colors?
Black only on the 8042S. The product is a black double fin silicone gasket, and length is the only choice you make when ordering: 17, 19, 21, or 25 foot coils. Black reads as a shadow line against most frame colors, which is why it's the standard pick on dark bronze and painted hollow metal. On a light or clear anodized frame where you want the seal to disappear, an aluminum-housed seal like the NGP 155V with a mill aluminum frame or the NGP 159MA magnetic seal in anodized aluminum blends better.
16) I need to keep dust and light out of a warehouse door but it isn't fire rated. Is the 8042S overkill?
Probably, if there's no label on the opening. The 8042S is a UL10C positive pressure, smoke and draft rated silicone gasket, and you pay for that rating whether the opening needs it or not. For a plain industrial door where you just want to stop dust, debris, and light spill, a brush seal such as the NGP 602A nylon brush seal in an anodized aluminum housing sweeps across an irregular gap without dragging. Keep the 8042S for the rated and conditioned openings in the building.
How fast can I get the Zero International 8042SBK204 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 8042SBK204 come with a warranty?
Absolutely. The Zero International 8042SBK204 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 8042SBK204?
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 Zero International 8042SBK204 from ZenSupply?
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