National Guard Products 103NA Adjustable Neoprene Perimeter Weatherstrip – Anodized Aluminum, Head-and-Jamb Set

National Guard Products (NGP) model 103NA is an adjustable neoprene perimeter weatherstrip finished in anodized aluminum with a black closed-cell elastomeric foam seal. Supplied as a complete head-and-jamb set (one head piece plus two jamb pieces), the 103NA is available in five door-opening sizes — 3′0 × 7′0, 4′0 × 7′0, 6′0 × 7′0, 6′0 × 8′0, and 8′0 × 8′0 — making it suitable for standard single doors, oversized single doors, and pairs. The 103NA is UL-certified for fire-rated hollow metal doors up to 3 hours and wood fire doors up to 90 minutes under both standard and positive-pressure test conditions, and it carries a UL Smoke & Draft Control Gasketing listing to ANSI/UL1784 Category H. This is a made-to-order product with a typical lead time of 10–15 business days.

103NA Perimeter Weatherstrip – Key Features

• Premium Aluminum Extrusion: Frame carrier is extruded from Aluminum Alloy 6063, T5 Temper for a lightweight, corrosion-resistant frame that holds a clean anodized finish over the life of the door.
• Advanced Elastomeric Seal: The sealing element is a synthetic EPDM rubber in a polypropylene thermoplastic matrix closed-cell advanced elastomeric foam, delivering very good abrasion resistance, tensile strength, and compression memory — maintaining a consistent perimeter seal through years of door cycles.
• Wide Temperature Range: Rated for continuous use from −81°F to 275°F, ensuring reliable performance in exterior doors, cold-storage applications, and high-temperature environments near fire-rated assemblies.
• Flame- and Moisture-Resistant Foam: The neoprene insert is both flame-resistant and moisture-resistant, with good resistance to ozone, sunlight, and aging — critical properties for exterior perimeter sealing in commercial and institutional buildings.
• Tool-Free Field Adjustment: Adjustment screws on 10-inch centers allow the seal to be moved through a 1/4-inch adjustment range without re-positioning or relocating the mounting holes — simplifying installation and fine-tuning on out-of-plumb frames.
• Stainless Steel Fasteners Furnished: Each set includes #6 × 3/4″ or #6 × 1-1/2″ stainless steel sheet-metal screws (SMS), eliminating the need to source separate hardware and preventing fastener corrosion at the frame interface.
• UL Fire-Door Certified – Standard Pressure: Certified by UL to CAN/ULC-S104 and ANSI/UL10B; complies with NFPA 80 and NFPA 252 for hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes.
• UL Fire-Door Certified – Positive Pressure: Certified by UL to ANSI/UL10C; complies with IBC, NFPA 80, and NFPA 252 for hollow metal positive-pressure fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes.
• Smoke & Draft Control Gasketing: Certified by UL to ANSI/UL10C and ANSI/UL1784 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.
• Air Infiltration Control: Recommended by NGP as a minimum air-leakage product, providing a tight perimeter seal that supports energy-code compliance and occupant comfort.
• Head-and-Jamb Set Convenience: Sold as a matched set (1 head + 2 jambs) cut to the selected opening size, reducing field measuring and minimizing material waste on the job site.

Technical Details

Pro Tip: Because adjustment screws are spaced on 10-inch centers with a 1/4-inch range of travel, installers can fine-tune the seal compression at multiple independent points along the frame stop without drilling new mounting holes — a significant time-saver on hollow metal frames that are slightly out of square or where the door is shimmed after the weatherstrip is mounted.