National Guard Products 135NA Neoprene Bulb Perimeter Weatherstrip – Anodized Aluminum, Head-and-Jamb Set

National Guard Products (NGP) model 135NA is a neoprene bulb perimeter weatherstrip finished in anodized aluminum with a black neoprene bulb insert. Sold as a complete head-and-jamb set — one head piece plus two jamb pieces — this screw-applied perimeter seal mounts directly to the frame stop to create a tight, durable seal around the full perimeter of commercial door openings. Five opening sizes are available: 3'0 x 7'0, 4'0 x 7'0, 6'0 x 7'0, 6'0 x 8'0, and 8'0 x 8'0. The 135NA carries UL fire door certifications for both standard and positive-pressure conditions, UL smoke and draft control listing, and BHMA certification to ANSI/BHMA A156.22 — making it a code-compliant, high-performance solution for hollow metal and wood fire-rated doors in commercial and institutional construction.

High-Performance Neoprene Bulb Weatherstrip Features

• Aluminum Alloy 6063-T5 Extrusion: The carrier is extruded from Aluminum Alloy 6063, T5 Temper, delivering a rigid, dimensionally stable frame mount that resists corrosion and holds fastener position over years of service.
• Synthetic EPDM / Neoprene Bulb in Polypropylene Thermoplastic Matrix: The black bulb seal is formulated from synthetic EPDM rubber in a polypropylene thermoplastic matrix, providing a resilient, compressible profile that conforms to door-leaf irregularities for a consistently tight perimeter seal.
• Very Good Abrasion Resistance, Tensile Strength, and Memory: The neoprene compound resists surface wear from repeated door cycles, maintains seal integrity under compression, and returns to its original profile — extending the effective service life of the gasketing system.
• Flame-Resistant and Moisture-Resistant: The bulb material is engineered to resist flame spread and moisture intrusion, both critical performance attributes for fire-rated door assemblies in commercial occupancies.
• Wide Service Temperature Range (–81°F to 275°F): Remains flexible and functional across extreme temperature conditions, from cold-storage environments to high-heat exposure during fire events.
• Good Resistance to Ozone, Sunlight, and Aging: The EPDM/neoprene formulation resists environmental degradation, keeping the bulb pliable and effective even in applications with UV or ozone exposure.
• UL Certified – Standard Fire (ANSI/UL10B and CAN/ULC-S104): Certified for application to hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes, in compliance with NFPA 80 and NFPA 252.
• UL Certified – Positive Pressure Fire (ANSI/UL10C): Meets positive-pressure fire-door requirements per ANSI/UL10C, IBC, NFPA 80, and NFPA 252 for hollow metal doors up to 3 hours and wood doors up to 90 minutes.
• UL Smoke and Draft Control Gasketing – Category 'H' (ANSI/UL10C and ANSI/UL1784): Listed for use on 'S'-labeled positive-pressure hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes, in compliance with IBC and NFPA 105.
• BHMA Certified to ANSI/BHMA A156.22: Independently certified to the American National Standard for Door Gasketing and Edge Sealing Systems, including performance tests for heat and cold, and listed in the BHMA Certified Products Directory.
• Stainless Steel Fasteners Furnished: #6 x 3/4" stainless steel sheet metal screws are included, providing corrosion-resistant fastening appropriate for commercial installations.
• Slotted Screw Holes for Field Adjustment: Factory-slotted holes allow on-site positioning adjustment of the weatherstrip carrier, simplifying alignment to the door stop and optimizing bulb contact without field fabrication.
• Made to Order in Five Opening Sizes: Available as a complete head-and-jamb set for door openings of 3'0 x 7'0, 4'0 x 7'0, 6'0 x 7'0, 6'0 x 8'0, and 8'0 x 8'0 — precision-cut to your specified opening at the factory.

Technical Details

Pro-Tip for Perimeter Sealing

The NGP 135NA is designed for surface application directly to the frame stop. Because the screw holes are factory-slotted, installers can shift the carrier laterally after initial placement to optimize bulb compression against the door face before final tightening. Use the furnished #6 x 3/4" stainless steel sheet metal screws for best corrosion resistance, especially in high-humidity or exterior vestibule applications. When ordering a head-and-jamb set, confirm your rough opening size matches one of the five available factory sizes — 3'0 x 7'0, 4'0 x 7'0, 6'0 x 7'0, 6'0 x 8'0, or 8'0 x 8'0 — to ensure pieces arrive precision-cut and ready to install without field modification. Plan for the 10–15 business day made-to-order lead time when scheduling fire-door hardware submittals and installation milestones.