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National Guard Products 172SDKB Silicone Concealed Fastener Perimeter Weatherstrip – Dark Bronze Head-and-Jamb Set
National Guard Products (NGP) 172SDKB is a concealed fastener perimeter weatherstrip set finished in Dark Bronze anodized aluminum with a black silicone insert. Engineered for commercial and institutional openings, the 172SDKB ships as a complete head-and-jamb set — one head piece and two jamb pieces — sized to the opening you select. It 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. The aluminum extrusion is screw-applied to the frame stop, and a snap-on cover conceals all fastener heads for a clean, finished appearance. This product carries UL certifications for fire-rated door applications and is BHMA certified to ANSI/BHMA A156.22, making it a high-performance solution for perimeter sealing on hollow metal and wood fire-rated doors.
High-Performance Perimeter Weatherstrip Features
- Dark Bronze Finish: Aluminum Alloy 6063, T5 Temper extrusion in a Dark Bronze finish coordinates with commercial door frames and hardware for a consistent architectural appearance.
- Black Silicone Insert: The synthetic rubber polymer silicone bulb seal delivers excellent flexibility and memory, maintaining a consistent perimeter seal through repeated door cycles.
- Extreme Temperature Performance: Rated for a temperature range of -81°F to 300°F, the silicone insert remains flexible at extreme temperatures — critical for cold-storage, exterior, and high-heat environments.
- Flame- and Moisture-Resistant: The silicone insert is both flame-resistant and moisture-resistant, contributing to the product's suitability for fire-rated openings and exterior applications.
- Ozone, UV, and Aging Resistance: Excellent resistance to ozone, UV exposure, and long-term aging helps the seal maintain performance over the life of the installation.
- FM200 and Halon Compatible: Recommended for areas utilizing FM200 or Halon fire suppression systems, where chemical resistance of the seal material is a priority.
- Concealed Fastener Design: A snap-on cover conceals screw heads after installation, providing a finished aesthetic suitable for high-visibility public and commercial interiors.
- Slotted Screw Holes for Adjustment: Screw holes are slotted, allowing field adjustment of the seal position against the door face for optimal compression and seal performance.
- Stainless Steel Fasteners Furnished: #6 x 3/4" stainless steel sheet metal screws are included with each set, eliminating the need to source separate hardware.
- UL Certified – Standard and Positive Pressure Fire Ratings: Certified by UL to CAN/ULC-S104 and ANSI/UL10B, and also certified by UL to ANSI/UL10C (Positive Pressure), complying 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.
- Smoke and 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 rated up to 3 hours and Wood fire doors rated up to 90 minutes.
- BHMA Certified – ANSI/BHMA A156.22: Certified gasketing complies with the American National Standard for Door Gasketing and Edge Sealing Systems and is listed in the BHMA Certified Products Directory, including performance tests for heat and cold.
- Head-and-Jamb Set Convenience: Sold as a matched set (1 head + 2 jambs) cut to your selected opening size, simplifying ordering and ensuring consistent profile across the entire door perimeter.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 172SDKB |
| Product Type | Concealed Fastener Perimeter Weatherstrip – Head-and-Jamb Set |
| Finish | Dark Bronze |
| Insert / Seal Material | Black Silicone (Synthetic Rubber Polymer) |
| Extrusion Material | Aluminum Alloy 6063, T5 Temper |
| Profile Section (Typical) | 7/8" x 5/16" |
| Set Configuration | 1 Head + 2 Jambs |
| 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 |
| Application Surface | Screw-applied to the frame stop |
| Fastener Concealment | Snap-on cover conceals screw heads |
| Screw Holes | Slotted for field adjustment |
| Fasteners Furnished | #6 x 3/4" Stainless Steel Sheet Metal Screws |
| Temperature Range | -81°F to 300°F; remains flexible at extreme temperatures |
| Flame Resistance | Flame-Resistant |
| Moisture Resistance | Moisture-Resistant |
| Environmental Resistance | Excellent resistance to ozone, UV, and aging |
| Fire Suppression Compatibility | Recommended for areas using FM200 or Halon fire suppression systems |
| UL Certification – Standard Fire | Certified by UL to CAN/ULC-S104 and ANSI/UL10B; complies with NFPA 80 and NFPA 252 — Hollow Metal fire doors up to 3 hours; Wood fire doors up to 90 minutes |
| UL Certification – Positive Pressure | Certified by UL to ANSI/UL10C; complies with IBC, NFPA 80 and NFPA 252 — Hollow Metal fire doors up to 3 hours; Wood fire doors up to 90 minutes |
| Smoke & Draft Control | Certified by UL to ANSI/UL10C and ANSI/UL1784 Category 'H'; complies with IBC and NFPA 105 — 'S' labeled Positive Pressure Hollow Metal fire doors up to 3 hours; Wood fire doors up to 90 minutes |
| BHMA Certification | ANSI/BHMA A156.22; listed in the BHMA Certified Products Directory; performance tests for heat and cold |
| Stocking Status | Made to Order |
| Lead Time | 10–15 Business Days |
Pro-Tip for Perimeter Sealing
The NGP 172SDKB is designed to be surface-applied directly to the frame stop using the furnished #6 x 3/4" stainless steel sheet metal screws. Because the screw holes are slotted, installers can fine-tune the lateral position of the seal for optimal compression against the door face before final tightening. Once the screws are set, simply press the snap-on cover over the extrusion to conceal all fastener heads — no additional finishing hardware required. When ordering, confirm your opening size from the five available configurations so the head and jamb pieces arrive pre-cut and ready to install.
| 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 | Dark Bronze |
| 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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