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National Guard Products 172SA Silicone Concealed Fastener Perimeter Weatherstrip — Anodized Aluminum, Head-and-Jamb Set
The National Guard Products (NGP) 172SA is a silicone perimeter weatherstrip finished in Anodized Aluminum with a black silicone insert, engineered for demanding commercial and institutional door openings where fire-rated performance, smoke and draft control, and long-term seal integrity are required. Sold as a complete head-and-jamb set (one head piece plus two jamb pieces), the 172SA is 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—making it suitable for single-door, paired-door, and oversized commercial openings alike. The extruded aluminum retainer applies directly to the frame stop with furnished stainless steel screws, and a snap-on cover conceals all fastener heads for a finished, professional appearance. This is a made-to-order product with a lead time of 10–15 business days.
High-Performance Silicone Perimeter Weatherstrip Features
- Fire-Rated Up to 3 Hours (Hollow Metal) / 90 Minutes (Wood): UL-Certified to CAN/ULC-S104 and ANSI/UL10B, complying with NFPA 80 and NFPA 252 for application to hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes.
- Positive Pressure Certified: UL-Certified to ANSI/UL10C, meeting the requirements of IBC, NFPA 80, and NFPA 252 for positive pressure applications on hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes.
- Smoke & 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: Independently certified gasketing system that meets the American National Standard for Door Gasketing and Edge Sealing Systems, including performance tests for heat and cold, and is listed in the BHMA Certified Products Directory.
- Air Infiltration Control: Recommended by NGP for minimum air leakage and a tight perimeter seal, supporting energy-efficient and pressurization-controlled building envelopes.
- FM200 and Halon Compatible: Silicone compound is specifically recommended for facilities using FM200 or Halon fire suppression systems, where chemical resistance to gaseous agents is critical.
- Extreme Temperature Flexibility: Silicone insert remains flexible across a wide temperature range of -81°F to 300°F, ensuring consistent sealing performance in both cold-storage and high-heat environments.
- Ozone, UV, and Aging Resistant: Synthetic rubber polymer formulation delivers excellent resistance to ozone, UV radiation, and long-term aging, reducing maintenance and replacement cycles in high-exposure applications.
- Flame-Resistant and Moisture-Resistant Insert: The black silicone gasket is both flame-resistant and moisture-resistant, suitable for vestibules, stairwells, and exterior-adjacent assemblies.
- Concealed Fastener Design: A snap-on aluminum cover hides all screw heads after installation, delivering a clean architectural finish consistent with premium commercial hardware specifications.
- Anodized Aluminum Retainer: The extruded Aluminum Alloy 6063, T5 Temper retainer with an Anodized Aluminum finish resists corrosion and maintains its appearance over the life of the opening.
- Head-and-Jamb Set in Five Sizes: Configured as a complete three-piece set covering the full door perimeter, available in 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 to match single, double, and oversized commercial door frames.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model | 172SA |
| Product Type | Silicone Perimeter Weatherstrip, Concealed Fastener, Head-and-Jamb Set |
| Finish | Anodized Aluminum |
| Insert Material | Silicone (Black) |
| Retainer Material | Aluminum Alloy 6063, T5 Temper |
| Profile Size | 7/8” x 5/16” |
| Temperature Range | -81°F to 300°F |
| Fasteners Furnished | #6 x 3/4” Stainless Steel Sheet Metal Screws |
| Screw Holes | Slotted for field adjustment |
| Application Surface | Frame stop (screw applied) |
| Fastener Concealment | Snap-on cover conceals screw heads |
| Available Opening Sizes | 3’0 x 7’0 | 4’0 x 7’0 | 6’0 x 7’0 | 6’0 x 8’0 | 8’0 x 8’0 |
| Set Configuration | 1 Head + 2 Jambs (complete perimeter set) |
| Stock Status | Made to Order — 10 to 15 Business Day Lead Time |
| UL Fire Rating — Standard Pressure | CAN/ULC-S104 and ANSI/UL10B; Hollow Metal up to 3 Hours, Wood up to 90 Minutes; complies with NFPA 80 and NFPA 252 |
| UL Fire Rating — Positive Pressure | ANSI/UL10C; Hollow Metal up to 3 Hours, Wood up to 90 Minutes; complies with IBC, NFPA 80, and NFPA 252 |
| Smoke & Draft Control | UL Certified to ANSI/UL10C and ANSI/UL1784 Category ‘H’; complies with IBC and NFPA 105 for ‘S’ labeled Positive Pressure Hollow Metal doors up to 3 Hours, Wood up to 90 Minutes |
| BHMA Certification | ANSI/BHMA A156.22; listed in BHMA Certified Products Directory |
| BHMA Performance Tests | Heat and Cold (ANSI/BHMA A156.22) |
| Flame Resistance | Yes |
| Moisture Resistance | Yes |
| Ozone / UV / Aging Resistance | Excellent |
| Fire Suppression Compatibility | Recommended for FM200 and Halon fire suppression systems |
Pro-Tip for Perimeter Sealing
The NGP 172SA mounts directly to the frame stop surface using the furnished #6 x 3/4” stainless steel sheet metal screws. The slotted screw holes allow lateral adjustment during installation so the silicone gasket can be precisely positioned against the door face before screws are fully tightened—an important advantage on hollow metal frames where stop profiles can vary slightly. Once the retainer is secured, press the snap-on cover into place to conceal fastener heads and deliver the clean, finished appearance typically required on architecturally specified commercial projects. Because this is a made-to-order set, confirm your opening size and handing requirements before ordering to avoid delays on your project schedule.
| Gasketing Set Size | 3'0 x 7'0 Set or 4'0 x 7'0 Set or 6'0 x 7'0 Set or 6'0 x 8'0 Set or 8'0 x 8'0 Set |
| Brand | National Guard Products |
| Housing Finish | Aluminum |
| Smoke Rated | Smoke Rated |
| Weatherstripping Type | Perimeter Gasketing |
| Housing Size | 7/8" x 5/16" |
| Insert Color | Black |
| Fasteners | #6 x 3/4" Stainless Steel Sheet Metal Screws Furnished |
| Fire Rated | Fire Rated |
| Insert Material | Silicone |
| Mounting Type | Screw Applied - Exp Screw, Surface Mounted |
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