Description

Pemko S773 Triple-Fin Adhesive Perimeter Gasket

The Pemko S773 Adhesive-Backed Perimeter Gasket is a high-performance, commercial-grade door seal engineered to deliver superior protection against smoke, fire, air infiltration, sound transmission, and weather elements. Ideal for hospitality, healthcare, multi-family housing, and other noise-sensitive environments, its advanced triple-fin design effectively blocks light and sound from entering a room—enhancing privacy, comfort, and safety.

Manufactured from high-temperature silicone, the S773 remains flexible and durable in extreme conditions, performing reliably between -58°F and 450°F. Its self-adhesive backing allows for quick, secure installation on the sides and top of door frames, creating a tight seal with excellent compression—while still allowing doors to latch easily.

Key Features & Benefits

• Triple-fin gasket design blocks light and reduces sound infiltration
• Seals against smoke, fire, air, sound, and weather
• Air infiltration rating: Only 0.09 CFM per foot of crack (ASTM E-283-91 tested)
• High-temperature silicone construction withstands extreme heat and cold
• Self-extinguishing and non-toxic material
• Resistant to sunlight, ozone, UV rays, fungus, and mildew
• Excellent compression memory for long-term performance
• Longest-lasting commercial-grade door seal

Certifications & Testing

• UL 10C – Positive Pressure Fire Tests
• UL 1784 – Air Leakage (Smoke) Tests
• ASTM E90 / BS EN ISO 140-3 – Sound Control
• ASTM E-283-04 (2012) – Air Infiltration
• ANSI/BHMA A156.22 Certified
• Underwriters Laboratory 4L10 Listed
• GREENGUARD Gold Certified
• Environmental Product Declaration (EPD)

Approved for use on:

• Steel frames and hollow metal fire doors rated up to 3 hours
• Wood and composite fire doors rated up to 1-1/2 hours
• Wood core fire doors rated up to 20 minutes

Specifications

• Material: Silicone
• Mounting Type: Self-adhesive
• Mounting Location: Side and top of frame
• Height: 3/8″
• Width: 1/2″
• Minimum Gap Size: 1/8″
• Weight: 0.02 lbs
• Available Lengths: 17′, 18′, 20′, 21′, 25′, 30′, 250′, and 510′ coils
• Maximum Length: 510′
• Minimum Length: 17′
• Not recommended for beveled doors

Available Finishes

• S773BL – Black Silicone
• S773W – White Silicone

Storage & Shelf Life

• Shelf life: 6 months from purchase
• Store between 50°F and 100°F

The Pemko S773 Triple-Fin Adhesive Perimeter Gasket delivers dependable, code-compliant protection with long-term durability—making it the trusted choice for commercial and hospitality door sealing applications where fire safety, smoke containment, and sound control are critical.