National Guard Products 120NA Neoprene Sponge Perimeter Weatherstrip Head-and-Jamb Set – Anodized Aluminum

National Guard Products (NGP) 120NA is a perimeter door weatherstrip head-and-jamb set featuring a patent-pending microcellular EPDM neoprene sponge seal housed in an anodized aluminum retainer. Each set includes one head strip and two jamb strips, covering the full door perimeter when screw-applied to the frame stop. Available in five standard opening sizes — 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 120NA delivers UL-certified fire-door compliance, positive-pressure smoke and draft control, and outstanding air infiltration resistance, making it an ideal choice for hollow metal and wood fire-rated openings in commercial and institutional construction.

High-Performance Perimeter Weatherstrip Features

• Aluminum Alloy Frame: Extruded from Alloy 6063, T5 Temper for a rigid, corrosion-resistant retainer that holds consistent contact along the full door perimeter.
• Patent-Pending Microcellular EPDM Seal: The synthetic EPDM rubber in a polypropylene thermoplastic matrix forms a closed-cell advanced elastomeric foam insert with very good abrasion resistance, tensile strength, and memory — maintaining an effective seal over repeated door cycles.
• Wide Temperature Range: Engineered to perform from -81°F to 275°F, suiting high-heat vestibules, cold-storage corridors, and all typical commercial environments.
• Flame- and Moisture-Resistant: The neoprene sponge insert is rated flame-resistant and moisture-resistant, contributing to its suitability on fire-rated openings.
• Ozone, Sunlight, and Aging Resistance: Good resistance to environmental degradation keeps the seal performing reliably without cracking or hardening over time.
• UL-Certified Fire-Door Compliance: Certified by UL to CAN/ULC-S104 and ANSI/UL 10B for hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes; complies with NFPA 80 and NFPA 252.
• Positive Pressure Certification: Certified by UL to ANSI/UL 10C — the more demanding positive-pressure fire test — complying with IBC, NFPA 80, and NFPA 252 for hollow metal doors up to 3 hours and wood doors up to 90 minutes.
• Smoke and Draft Control Gasketing: Certified by UL to ANSI/UL 10C and ANSI/UL 1784 Category 'H'; complies with IBC and NFPA 105 for use on 'S'-labeled positive-pressure hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes.
• BHMA Certified Performance: Certified to ANSI/BHMA A156.22 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 with every set.
• Slotted Screw Holes: Factory-slotted mounting holes allow field adjustment for precise seal contact and alignment on the frame stop.
• Made to Order: Each set is fabricated to the specified opening size; please allow 10–15 business days lead time.

Technical Details

Pro-Tip for Perimeter Sealing

The NGP 120NA is designed for surface application directly to the frame stop. Because the screw holes are factory-slotted, installers can shift each strip slightly inward or outward to dial in consistent contact pressure around the full door perimeter before final tightening. The furnished #6 x 3/4" stainless steel sheet metal screws resist corrosion, making them well suited for high-humidity corridors, exterior vestibules, and stairwell enclosures. When ordering, confirm your exact door opening size — the 120NA is made to order in five pre-configured sizes, so selecting the correct nominal opening at the time of purchase ensures a field-ready fit without field cutting the retainer.