Description

Pemko 305_R Standard Perimeter Gasket-Sponge Neoprene

The Pemko 305_R Standard Perimeter Gasketing is a durable, code-compliant sealing solution designed for commercial and fire-rated door assemblies. Constructed from aluminum or stainless steel with a sponge neoprene insert, this perimeter gasket provides reliable protection against smoke, fire, air infiltration, and weather.

Designed for installation on the side of the door frame (top and sides), it compresses securely against the door to form a tight, consistent seal. It can also be used as a meeting stile gasket, offering versatile performance across a variety of door applications.

Key Features

• Seals gaps up to the depth of its seal (see line drawing for seal depth)
• Screw-applied installation for secure mounting
• Can be used as a perimeter gasket or meeting stile seal
• Supplied with a slightly compressible sponge neoprene insert
• Flexible in both high and low temperature environments
• Resistant to deterioration from oily substances

Specifications

• Fasteners: PHSMS #6 x 5/8″
• Maximum Length: 185″
• Minimum Length: 2′
• Mounting Location: Side of frame
• Mounting Type: Screw applied
• Overall Height: 47/250″
• Profile Height: 7/8″

Certifications & Compliance

• GREENGUARD Gold Certified
• UL 4L10 Listed
• UL 1784 – Air Leakage Tests of Door Assemblies
• UL 10C – Positive Pressure Fire Tests of Door Assemblies
• ASTM E-283-04 (2012)
• ANSI/BHMA A156.22 – Door Gasketing and Edge Seal Systems

Applications

• Fire-rated door assemblies
• Commercial and institutional buildings
• Smoke and air control
• Weather protection for door perimeters
• Meeting stile sealing

The Pemko 305_R Standard Perimeter Gasketing with Sponge Neoprene Insert delivers dependable sealing performance, enhanced durability, and compliance with industry standards—making it an ideal choice for demanding commercial environments.

Finish Available

• 305CR – Clear Anodized Aluminum