Pemko S771D Silicone Astragal & Meeting Stile Gasket - 84" Dark Brown
The Pemko S771D is a professional-grade, Self-Adhesive Silicone Gasket engineered for use as an astragal or meeting stile seal on pairs of doors. Finished in a discreet Dark Brown (D), this 84-inch (7 ft) strip creates a tight, flexible barrier that significantly reduces sound transmission, prevents heat loss, and slows the passage of smoke. Manufactured from high-quality silicone, the S771D offers superior resistance to "compression set"—ensuring the seal bounces back after every opening—and maintains its integrity under extreme temperature fluctuations.
Institutional Grade Features
- Advanced Material Performance: Remains flexible in extreme environments ranging from -58°F to 450°F, ensuring a low closing force and consistent seal in both walk-in freezers and high-heat mechanical rooms.
- Fire & Life Safety Certified: UL10C Positive Pressure rated, making it suitable for steel doors rated up to 3 hours and wood/plastic composite doors rated up to 1-1/2 hours.
- Acoustic & Thermal Shield: Designed for superior sound attenuation and weatherization, acting as a thermal break to reduce energy costs and improve occupant comfort in LEED-certified buildings.
- Flex Fatigue Resistance: Engineered to withstand hundreds of thousands of cycles without cracking or losing its shape, providing a long-term solution for high-traffic entryways.
- Easy Field Installation: Features a high-bond adhesive backing for quick application without the need for mechanical fasteners. The 84" length can be easily trimmed to fit standard or custom door heights.
Technical Specifications
- Manufacturer: Pemko (ASSA ABLOY)
- Model Number: S771D (Dark Brown) / S771C (Clear)
- Length: 84" (7 Feet)
- Material: Siliconoseal (High-Grade Silicone)
- Fire Rating: UL10C - Category H & J
- Standards: Meets UBC 7-2 (1997) Part II for positive pressure openings.
| Gasketing Set Size | 7 ft roll |
| Brand | Pemko |
| Mounting Type | Adhesive Applied |
| Fire Rated | Fire Rated |
| Smoke Rated | Smoke Rated |
| Sound Rated | Sound Rated |
| Insert Material | Silicone, Single Fin |
| Gasketing Finish | Dark Brown |
| Weatherstripping Type | Astragal |
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