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National Guard Products 127SDKB Silicone Sponge Perimeter Weatherstrip Head-and-Jamb Set – Dark Bronze
National Guard Products (NGP) 127SDKB is a silicone sponge perimeter weatherstrip head-and-jamb set finished in Dark Bronze with a black closed-cell microcellular silicone insert. Engineered for commercial and institutional openings, this screw-applied gasketing system installs directly to the frame stop and ships as a complete three-piece set — one head piece and two jamb pieces — sized to fit your opening. Five standard opening sizes are available: 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 127SDKB is UL-certified for fire-rated hollow metal and wood door assemblies, BHMA-certified to ANSI/BHMA A156.22, and qualifies as smoke and draft control gasketing — making it one of the most code-critical perimeter seals available for demanding commercial applications.
High-Performance Silicone Sponge Weatherstrip Features
- Patent-Pending Microcellular Silicone Sponge: NGP's closed-cell silicone sponge insert delivers excellent flexibility and memory, returning to its original profile after each door cycle to maintain a consistent, reliable seal.
- Extreme Temperature Performance: Rated from -81°F to 300°F, the silicone insert remains flexible across the full range of climatic and mechanical conditions encountered in commercial buildings.
- Flame-Resistant and Moisture-Resistant Construction: The closed-cell sponge resists moisture absorption and meets flame-resistance requirements, making it suitable for fire-rated door assemblies.
- Ozone, UV, and Aging Resistance: The silicone formulation withstands ozone attack, ultraviolet exposure, and long-term aging — reducing maintenance intervals in high-traffic or exterior-adjacent openings.
- FM200 and Halon Compatible: Specifically recommended for facilities that use FM200 or Halon fire suppression systems, where chemical compatibility of door components is required.
- Aluminum Alloy 6063-T5 Carrier: The extruded aluminum carrier provides a rigid, corrosion-resistant backbone that holds alignment on the frame stop throughout the door's service life.
- Dark Bronze Finish with Black Insert: The Dark Bronze anodized-style aluminum carrier and black silicone sponge insert coordinate with popular dark-finish commercial hardware and hollow metal frames.
- UL Fire and Positive Pressure Certified: Certified by UL to CAN/ULC-S104, ANSI/UL10B, and ANSI/UL10C — compliant with NFPA 80 and NFPA 252 for hollow metal fire doors up to 3 hours and wood fire doors 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 'S'-labeled positive pressure hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes.
- BHMA Certified to ANSI/BHMA A156.22: Listed in the BHMA Certified Products Directory, confirming compliance with the American National Standard for Door Gasketing and Edge Sealing Systems, including performance tests for heat and cold.
- Stainless Steel Screws Included: #6 x 3/4" stainless steel sheet metal screws are furnished with every set, so no separate fastener order is required.
- Made to Order — Five Opening Sizes: Available 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 to cover single and double commercial openings; allow 10–15 business days for production.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 127SDKB |
| Product Type | Perimeter Weatherstrip Head-and-Jamb Set, Screw Applied |
| Finish | Dark Bronze |
| Insert Material | Patent-Pending Microcellular Silicone, Closed-Cell Sponge (Black) |
| Carrier Material | Aluminum Alloy 6063, T5 Temper |
| Typical Profile Section | 1" x 3/16" |
| Set Configuration | 1 Head + 2 Jambs (complete perimeter set) |
| 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 | Frame Stop, Screw Applied |
| Fasteners Furnished | #6 x 3/4" Stainless Steel Sheet Metal Screws |
| Screw Holes | Slotted for Field Adjustment |
| Temperature Range | -81°F to 300°F |
| Fire Rating (Hollow Metal) | Up to 3 Hours |
| Fire Rating (Wood Doors) | Up to 90 Minutes |
| UL Certifications | CAN/ULC-S104, ANSI/UL10B (Standard), ANSI/UL10C (Positive Pressure) |
| Smoke & Draft Control | UL Certified to ANSI/UL10C and ANSI/UL1784 Category 'H' |
| Building Code Compliance | NFPA 80, NFPA 105, NFPA 252, IBC |
| BHMA Certification | ANSI/BHMA A156.22 (Heat and Cold Performance Tests); Listed in BHMA Certified Products Directory |
| Flame Resistance | Yes |
| Moisture Resistance | Yes |
| Ozone / UV / Aging Resistance | Excellent |
| FM200 / Halon Compatible | Yes — Recommended for Fire Suppression System Environments |
| Availability | Made to Order — 10 to 15 Business Day Lead Time |
Pro-Tip for Perimeter Sealing
The NGP 127SDKB is surface applied directly to the frame stop, not mortised or routed into the frame. Because the screw holes are slotted for adjustment, installers can shift the carrier laterally after initial fastening to fine-tune sponge compression against the door face before final tightening. All required #6 x 3/4" stainless steel sheet metal screws are furnished in the set, so no additional fasteners need to be sourced in the field. For fire-rated and smoke-control openings, confirm that the door clearances and frame preparation comply with the door manufacturer's listing and the authority having jurisdiction (AHJ) before installation.
| 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 | 1" x 3/16" |
| 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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