National Guard Products 172NA Neoprene Concealed Fastener Perimeter Weatherstrip, Anodized Aluminum — Head-and-Jamb Set

National Guard Products (NGP) model 172NA is a neoprene concealed-fastener perimeter weatherstrip finished in anodized aluminum with a black neoprene insert. Sold as a complete head-and-jamb set (one head piece plus two jamb pieces), the 172NA mounts surface-applied to the door frame stop, where its snap-on aluminum cover conceals all screw heads for a clean, professional appearance. The set ships 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 — and is made to order with a typical lead time of 10–15 business days. UL-certified for fire-rated hollow metal doors up to 3 hours and wood fire doors up to 90 minutes, and ANSI/BHMA A156.22 certified, the 172NA delivers reliable perimeter sealing, smoke and draft control, and air infiltration reduction for commercial and institutional openings.

High-Performance Perimeter Weatherstrip Features

• Concealed Fastener Design: A snap-on aluminum cover conceals screw heads after installation, delivering a finished appearance on the frame stop without exposed hardware.
• Aluminum Alloy 6063-T5 Extrusion: The carrier extrusion is formed from Alloy 6063, T5 temper — a commercial-grade specification widely used in architectural door and frame hardware for strength and corrosion resistance.
• EPDM Neoprene Seal in Polypropylene Matrix: The black seal is a synthetic EPDM rubber set in a polypropylene thermoplastic matrix, providing very good abrasion resistance, tensile strength, and compression memory for long-lasting perimeter contact.
• Broad Temperature Range: Rated from -81°F to 275°F, the seal maintains flexibility and performance across extreme climate conditions, from cold-climate installations to heat-exposed frames.
• Flame-Resistant and Moisture-Resistant: The neoprene compound resists flame spread and moisture ingress, supporting use on fire-rated openings and exterior or vestibule applications.
• Ozone, Sunlight, and Aging Resistance: Good resistance to ozone, UV exposure, and long-term aging helps preserve seal integrity in high-traffic or exterior-facing installations.
• Slotted Screw Holes for Field Adjustment: Slotted mounting holes allow lateral adjustment during installation so installers can fine-tune seal compression against the door face without re-drilling.
• Stainless Steel Fasteners Furnished: #6 x 3/4" stainless steel sheet metal screws are included, resisting corrosion in damp or exterior environments.
• UL-Certified Fire Door Rating: Certified by UL to CAN/ULC-S104 and ANSI/UL10B for hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes, complying with NFPA 80 and NFPA 252.
• Positive Pressure Fire Certification: Certified by UL to ANSI/UL10C for positive-pressure applications, 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/UL10C and ANSI/UL1784 Category ‘H’, complying 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.
• ANSI/BHMA A156.22 Certified: Meets ANSI/BHMA A156.22 performance tests for heat and cold and is listed in the BHMA Certified Products Directory for door gasketing and edge sealing systems.
• Five Opening Sizes Available: Offered as a complete head-and-jamb set in 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, covering standard single and double door openings in commercial applications.

Technical Details

Pro-Tip for Perimeter Sealing

The NGP 172NA is designed for surface application directly to the door frame stop. During installation, use the slotted screw holes to fine-tune the horizontal position of the weatherstrip before final tightening, ensuring consistent seal compression along the full height of each jamb and across the head. The furnished #6 x 3/4" stainless steel sheet metal screws resist corrosion in damp or exterior-facing vestibule conditions. Once the carrier is secured, the snap-on cover presses into place over the screw heads, completing the clean architectural finish. For fire-rated openings, verify that the door and frame assembly carry the appropriate UL labels matching the 172NA’s certified ratings prior to installation.