Description
Pemko PK33 PemkoPrene® Adhesive Perimeter Gasket
The PK33 PemkoPrene® Adhesive Perimeter Gasket is a high-performance, commercial-grade seal designed for tighter door frames. Additionally, it features extremely low closing force, ensuring doors close easily while maintaining a secure seal against smoke, fire, air, sound, and weather. Because the seal begins compressing at 3/16″ and seals gaps up to 1/16″, it provides precise and reliable protection for fire-rated door assemblies.
Moreover, the PK33 is made from self-extinguishing, non-toxic high-temperature silicone, making it resistant to sunlight, ozone, and UV rays. In fact, it is impervious to fungus and mildew, providing long-lasting performance in demanding commercial environments. Furthermore, it is easy to install, adhesive-backed, and can be used on the top and sides of steel, composite, and wood fire doors.
Key Features
- Adhesive-backed PemkoPrene® material for simple installation
- Extremely low closing force for smooth door operation
- Compresses to seal gaps up to 1/16″ (starts compressing at 3/16″)
- Seals against smoke, fire, air, sound, and weather
- Resistant to sunlight, ozone, UV, moisture, fungus, and mildew
- Available in dark brown, black
- Commercial-grade, long-lasting durability
- Suitable for steel, composite, and wood fire doors up to 3 hours
Certifications & Ratings
- Fire Rated – UL10C Positive Pressure
- Underwriters Laboratory 4L10
- Smoke Tested – UL1784
- Sound Tested – ASTM E90
- Air Infiltration Tested
- BHMA Certified
- GREENGUARD Gold Certified
Specifications
- Gasket Type: Adhesive-backed perimeter gasket
- Width: 3/8″
- Seal Compression: Begins at 3/16″, seals up to 1/16″ gap
- Material: PemkoPrene® high-temperature silicone
- Available Coil Lengths: 17, 20.
- Colors: Black, Dark Brown
Overall, the PK33 PemkoPrene® Adhesive Perimeter Gasket delivers precise sealing, low closing force, and long-lasting performance, making it ideal for commercial fire doors and tight-fitting frames. As a result, it ensures both safety and reliable door operation in demanding environments.









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