Pemko S771C Silicone Astragal & Meeting Stile Gasket - 84" Length
The Pemko S771C is a professional-grade, Self-Adhesive Silicone Gasket engineered for use as an astragal or meeting stile seal on pairs of doors. This 84-inch (7 ft) strip is designed to create a tight, flexible barrier that significantly reduces sound transmission (smoke and sound), prevents heat loss, and slows the passage of smoke. Manufactured from high-quality silicone, the S771C offers superior resistance to compression set and maintains its seal integrity even under extreme temperature fluctuations, making it an essential component for LEED-certified and fire-rated openings.
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.
- Compression Set Resistance: Unlike lower-grade rubber seals, this silicone gasket resists "taking a set" or flattening over time, ensuring the seal "bounces back" after every door cycle.
- Easy Field Installation: Features a high-bond adhesive backing for quick installation without the need for mechanical fasteners. The 84" length can be easily trimmed to fit standard or undersized door heights.
Technical Specifications
- Manufacturer: Pemko (ASSA ABLOY)
- Model Number: S771C (Clear) / S771D (Dark Brown)
- 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 |
| Weatherstripping Type | Astragal |
| Gasketing Finish | Clear |
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