Pemko S442 High-Temperature Si...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$79.00
$54.95
Pemko S442 High-Temperature Silicone Fire/Smoke Gasketing 1/2" x 1/2" with Adhesive Backing

Pemko S442 High-Temperature Silicone Fire/Smoke Gasketing 1/2" x 1/2" with Adhesive Backing

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Model: S442BL25
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$79.00
$54.95
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Pemko S442 High-Temperature Silicone Fire/Smoke Gasketing 1/2"; x 1/2"; with Adhesive Backing

Professional Fire-Rated Door Sealing Solution

The Pemko S442 adhesive-backed fire and smoke gasketing provides comprehensive protection against smoke, fire, air, sound, and weather infiltration. This high-temperature silicone gasket features 1/2"; x 1/2"; dimensions and is engineered for commercial-grade applications with self-extinguishing, non-toxic properties. Available in multiple coil lengths including 17, 18, 20, 21, 25 and 510 ft. options, the S442 meets stringent fire door requirements with Category J and H ratings for various door types and fire ratings up to 3 hours.

Professional Features & Benefits

  • Precise Dimensions: 1/2"; x 1/2"; profile designed for optimal sealing performance on door frames for top and side applications.
  • Fire Door Compatibility: Category J gaskets for steel frames and classified doors rated up to 3 hours, wood and plastic composite doors up to 1-1/2 hours, and wood core doors for 20 minutes.
  • High-Temperature Silicone Construction: Self-extinguishing and non-toxic material provides reliable performance under extreme fire conditions with impervious resistance to fungus and mildew.
  • Multi-Hazard Protection: Seals effectively against smoke, fire, air, sound, and weather infiltration for comprehensive door perimeter protection.
  • Environmental Resistance: Unaffected by sunlight, ozone, and ultraviolet rays while maintaining consistent sealing properties in demanding conditions.
  • Flexible Length Options: Available in 17, 18, 20, 21, 25 and 510 ft. coils to accommodate various project requirements and minimize waste.
  • Easy Installation: Adhesive backing allows for quick application to door frames without additional fasteners or tools.
  • Manufacturer Warranty: 2 Year warranty coverage for added confidence and protection in commercial applications.

Technical Specifications

  • ANSI/BHMA: 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
  • Application: Door Frames to Seal Top and Sides of Door
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Features: Self-Extinguishing, Non-Toxic, Impervious to Fungus and Mildew
  • Product Category: Door Trim and Accessories
  • Product Dimension: H: 1/2", W: 1/2";
  • Product Group: Door Trim and Accessories
  • Product Model: S442
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Substrate: Silicone
  • Product Type: Gaskets
  • Subcategory: Gaskets & Weatherstripping
  • Warranty: 2 Year

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Industrial and Manufacturing Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • Hospitality and Entertainment Venues

Why Choose Pemko Quality?

Pemko S442 fire and smoke gasketing delivers professional-grade reliability with high-temperature silicone construction that meets stringent UL10C fire ratings and BHMA certification standards. The self-extinguishing, non-toxic material provides long-lasting commercial performance with 2 Year warranty coverage. Engineered for demanding commercial applications where code compliance and dependable fire protection are essential.

Product Specs

Features:
Self-Extinguishing, Non-Toxic, Impervious to Fungus and Mildew
Application:
Door Frames to Seal Top and Sides of Door
Warranty:
2 Year
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Gaskets
Subcategory:
Gaskets & Weatherstripping
ANSI/BHMA:
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
Commercial/Residential:
Commercial
Product Model:
S442
Product Dimension:
H: 1/2", W: 1/2"
Product Category:
Door Trim and Accessories
Product Substrate:
Silicone
Department:
Door Hardware

Pemko S442BL25 – Frequently Asked Questions

1) Will Pemko S442 silicone gasketing work on a 3-hour rated steel door frame?
Yes. The S442 is a Category J gasket, which covers steel frames and classified doors rated up to 3 hours. The same gasket carries Category H coverage for wood and plastic composite doors up to 1-1/2 hours, and wood core doors at 20 minutes. It's fire rated to UL10C positive pressure and smoke tested to UL1784, so it works where the smoke seal is part of the fire door assembly requirement.
2) Where on the door does Pemko S442 gasketing get applied, and does it seal the bottom?
The S442 mounts to the door frame and seals the top and sides of the door only. It is not a bottom seal. For the sill you need a separate door bottom or automatic door bottom plus a threshold. Buyers gasketing a full opening should plan on the S442 for the head and both jambs, with a different part for the bottom.
3) Is Pemko S442 approved for commercial fire door use, or is it a residential weatherstrip?
Commercial. The S442 is BHMA certified and carries Intertek (Warnock Hersey) and Underwriters Laboratory 4L10 listings, which is the paperwork an AHJ or a fire door inspector looks for when the gasketing is part of the labeled assembly. Residential-grade adhesive weatherstrip has none of that and will fail a fire door inspection on a rated opening.
4) What size is the Pemko S442 gasket profile?
The S442 silicone bulb measures 1/2 inch by 1/2 inch. That's the profile section that sits in the frame rabbet, so check you have at least a 1/2 inch flat stop face to land the adhesive on before ordering. On a tight stop, a lower-profile gasket is the better call.
5) Does Pemko S442 need screws, or is the adhesive backing enough?
Adhesive backing only, no fasteners or drilling. You peel and press it onto the frame stop. That's the main reason it gets specified for retrofit work on occupied buildings, since a maintenance tech can re-gasket an opening without pulling the frame or making holes. Surface prep matters: the stop needs to be clean and dry for the adhesive to hold.
6) How much Pemko S442 gasketing do I need for one door, and does it come in bulk coils?
The S442 is sold in seven lengths per color: 17, 18, 20, 21, 25, 30, and 510. The short lengths suit doing a single opening, and the 510 coil is the bulk option for a facility standardizing gasketing across many doors in one order. Cut to length on site with a sharp blade.
7) Is Pemko S442 gasketing rated for sound control, or just fire and smoke?
Both. The S442 is sound tested to ASTM E90 and air infiltration tested, on top of the UL1784 smoke rating and UL10C fire rating. In practice that makes it a single gasket for an opening that needs a smoke seal for code and acoustic separation for the occupants, which is a common combination on healthcare corridors, exam rooms, and hotel entry doors.
8) Is Pemko S442 silicone gasketing OK on an exterior door that gets full sun?
Yes. The silicone is unaffected by sunlight, ozone, and ultraviolet rays, and it's impervious to fungus and mildew, which is where cheaper foam and vinyl gasketing fails first on a sun-exposed or humid opening. It also seals against air and weather infiltration, not just smoke.
9) What colors does Pemko S442 fire and smoke gasketing come in?
Three: black silicone, dark brown silicone, and white silicone. Since the gasket sits on the face of the stop where it's visible when the door is open, most people match it to the frame paint, black or brown on dark hollow metal and white on painted white frames.
10) Does Pemko S442 gasketing count toward LEED or a green building spec?
The S442 is Greenguard Gold certified, which is the low chemical emissions certification institutional specs most often call for on interior products in schools and healthcare. The silicone is also non-toxic and self-extinguishing. Those are the two attributes an environmental spec section normally asks for on perimeter gasketing.
How fast can I get the Pemko S442BL25 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 S442BL25 come with a warranty?
Absolutely. The Pemko S442BL25 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 S442BL25?
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 S442BL25 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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