Pemko 303 Fire-Rated Perimeter...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$153.00
$147.28
Pemko 303 Fire-Rated Perimeter Gasketing with Insert - 1-1/8" x 1/4" Aluminum

Pemko 303 Fire-Rated Perimeter Gasketing with Insert - 1-1/8" x 1/4" Aluminum

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Model: 303DPK 72X84
$153.00
$147.28
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$153.00
$147.28
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Pemko 303 Fire-Rated Perimeter Gasketing with Insert - 1-1/8"; x 1/4"

Professional Fire-Rated Door Sealing Solution

The Pemko 303 Standard Perimeter Gasketing provides Category J gasket performance for listed steel frames and classified doors with fire ratings up to 3 hours for steel doors, 1-1/2 hours for wood and plastic covered composite doors, and 20 minutes for wood core doors. This rigid jamb weatherstrip features 1-1/8"; x 1/4"; aluminum construction with silicone insert and can seal gaps up to the depth of its seal from standard 1/16"; openings. UL10C Positive Pressure fire rated and GREENGUARD Gold certified for superior performance and environmental safety.

Professional Features & Benefits

  • Precision Dimensions: 1-1/8"; height x 1/4"; width aluminum profile designed for standard 1/16"; gaps with sealing capability up to full seal depth.
  • Multi-Hour Fire Rating: UL10C Positive Pressure fire rated for steel doors up to 3 hours, composite doors up to 1-1/2 hours, and wood core doors for 20 minutes.
  • Durable Aluminum Construction: Rigid aluminum substrate with silicone insert provides long-lasting performance and weather resistance.
  • Comprehensive Testing Certifications: Air infiltration tested, sound tested per ASTM E90, smoke tested UL1784, and BHMA certified for professional applications.
  • Flexible Gap Sealing: Each weatherstrip can accommodate gaps up to the depth of its seal, providing versatile installation options.
  • Environmental Certification: GREENGUARD Gold certified for low chemical emissions and indoor air quality.
  • Premium Fastening System: Supplied with stainless steel fasteners as standard with alternative fastener options available.
  • Manufacturer Warranty: 5 Year warranty coverage for added confidence and protection.

Technical Specifications

  • ANSI/BHMA: Air Infiltration Tested, Sound Tested ASTM E90, BHMA Certified, Smoke Tested UL1784, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, GREENGUARD Gold Certified
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Dimension: W: 1/4", H: 1-1/8";
  • Product Group: Door Trim and Accessories
  • Product Model: 303
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Substrate: Aluminum
  • Product Type: Gaskets
  • Subcategory: Gaskets & Weatherstripping
  • Warranty: 5 Year

Professional Applications

  • Fire-Rated Commercial Door Systems
  • Healthcare Facility Fire Barriers
  • Educational Institution Safety Compliance
  • Industrial Fire Separation Requirements
  • Multi-Tenant Residential Fire Doors
  • Government and Municipal Building Safety
  • High-Rise Building Fire Protection Systems

Why Choose Pemko Quality?

Pemko perimeter gasketing delivers professional-grade fire protection with comprehensive UL10C Positive Pressure fire rating and multi-hour performance capabilities for demanding commercial applications. GREENGUARD Gold certification and 5 Year warranty demonstrate the company's commitment to environmental responsibility and long-term reliability. Engineered for critical fire and life-safety applications where dependable sealing performance is essential for code compliance and occupant protection.

Product Specs

Warranty:
5 Year
Subcategory:
Gaskets & Weatherstripping
Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Gaskets
ANSI/BHMA:
Air Infiltration Tested, Sound Tested ASTM E90, BHMA Certified, Smoke Tested UL1784, Fire Rated UL10C Positive Pressure, cUL Listed 4L10, GREENGUARD Gold Certified
Commercial/Residential:
Commercial
Product Model:
303
Product Dimension:
W: 1/4", H: 1-1/8"
Product Category:
Door Trim and Accessories
Product Substrate:
Aluminum
Department:
Door Hardware

Pemko 303DPK 72X84 – Frequently Asked Questions

1) Is the Pemko 303 perimeter gasketing approved for use on a fire-rated steel door assembly?
Fire rated UL10C Positive Pressure and cUL Listed 4L10. The Pemko 303 delivers Category J gasket performance on listed steel frames and classified doors, and on steel doors it carries fire ratings up to 3 hours. It is also BHMA certified, smoke tested to UL1784 and air infiltration tested, so it covers the usual line items on a commercial door hardware spec for gasketing. The rating belongs to the assembly, so the frame has to be a listed steel frame and the door a classified door for those hours to apply.
2) Can I use Pemko 303 gasketing on a wood fire door, and what rating do I get?
You can, but the hours drop with the door. On wood and plastic covered composite doors the 303 is good to 1-1/2 hours, and on wood core doors it is 20 minutes. The full 3 hour rating only applies to steel doors. The Category J performance is stated for listed steel frames and classified doors, so the frame side still needs to be a listed steel frame no matter which door leaf you are gasketing.
3) How much gap will the Pemko 303 weatherstrip close on a door frame?
It is built around a standard 1/16 inch clearance between door and stop, and it will seal gaps up to the depth of its seal. The aluminum carrier itself is 1/4 inch wide and 1-1/8 inch high, so the strip sits on the stop face and the insert bridges the clearance. On a frame with uneven or excessive clearance you are past what a rigid perimeter strip is meant to take up, and the fix is the frame, not a bigger gasket.
4) Does Pemko 303 gasketing come with screws, and how does it fasten to the frame?
Stainless steel fasteners ship with it as standard, and alternative fastener options are available if your job calls for something else. The 303 is a rigid jamb weatherstrip: the aluminum carrier screws to the frame stop and the insert does the sealing. Nothing else is required to mount it.
5) Do I have to specify the insert type when ordering Pemko 303 gasketing?
Yes. Insert type is a separate choice from size and finish, and there are three: Eco-V, PemkoPrene, or sponge silicone. All three sit in the same 1/4 inch wide by 1-1/8 inch high rigid aluminum carrier, so the frame preparation and the fastening are identical whichever you pick. Leave it off the order and the part is not fully specified.
6) Will Pemko 303 gasketing cut down noise and smoke transfer through corridor doors?
It is sound tested per ASTM E90, smoke tested to UL1784 and air infiltration tested, which is the test package a hospital or school corridor spec normally asks for on a perimeter seal. Bear in mind the strip only closes the head and jamb clearance. Whatever is happening at the bottom of the door is a separate seal, and the sound result you get on a real opening depends on the whole assembly, not the gasket alone.
7) Can Pemko 303 perimeter gasketing be added to apartment corridor and stairwell fire doors that are already hung?
It is a surface applied jamb weatherstrip, so it goes onto the frame stop of an existing opening with the supplied stainless steel fasteners rather than needing any door prep. The 303 is a commercial product and its Category J performance is stated for listed steel frames and classified doors, which is what corridor and stair doors in multi-family buildings normally are. On steel doors that means coverage up to 3 hours.
8) Which Pemko 303 finish should I order to match dark bronze frames?
Dark bronze anodized aluminum is the match. The other two choices are clear anodized aluminum, which suits aluminum and stainless openings, and mill finish aluminum, which is bare unfinished aluminum and the one to take if the strip is going to be painted out with the frame. Finish is chosen independently of size and insert type, so you can standardize one finish across a whole building's openings.
9) Is Pemko 303 gasketing acceptable for a school or healthcare project with low-emission material requirements?
GREENGUARD Gold certified, which is the certification those specs usually name for indoor air quality in schools and healthcare spaces. It also carries the BHMA certification and the UL10C Positive Pressure fire rating, so one part answers both the environmental line and the life-safety line on the door hardware schedule.
How fast can I get the Pemko 303DPK 72X84 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 303DPK 72X84 come with a warranty?
Absolutely. The Pemko 303DPK 72X84 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 303DPK 72X84?
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 303DPK 72X84 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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