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National Guard Products 137SDKB Silicone Dense Bulb Perimeter Weatherstrip Head-and-Jamb Set, Dark Bronze
National Guard Products (NGP) model 137SDKB is a Silicone Dense Bulb Perimeter Weatherstrip set finished in Dark Bronze anodized aluminum with a black dense silicone bulb insert. Sold as a complete head-and-jamb set (one head piece plus two jamb pieces), this screw-applied perimeter seal is engineered for demanding commercial and institutional openings where fire rating, smoke control, air infiltration performance, and long-term durability are required. Five standard opening configurations 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—making the 137SDKB a versatile solution for single doors, pairs, and oversized commercial openings. Because each set is made to order, please allow 10–15 business days for production and shipment.
High-Performance Silicone Dense Bulb Weatherstrip Features
- Aluminum Alloy Frame: Extruded from Aluminum Alloy 6063, T5 Temper for a rigid, corrosion-resistant retainer that holds its shape over the life of the opening.
- Dense Silicone Bulb Insert: The black synthetic rubber polymer bulb delivers excellent flexibility and memory, compressing uniformly against the door face and rebounding to its original profile with every cycle.
- Extreme Temperature Performance: Remains flexible and functional across a rated temperature range of −81°F to 300°F, making it suitable for cold-storage corridors, mechanical rooms, and exterior vestibules alike.
- Flame and Moisture Resistance: The silicone bulb is flame-resistant and moisture-resistant, protecting building interiors from water infiltration and meeting the demands of fire-rated assemblies.
- Ozone, UV, and Aging Resistance: Silicone chemistry provides exceptional resistance to ozone, ultraviolet radiation, and long-term environmental aging—critical for perimeter seals on exterior or high-light-exposure openings.
- FM200 and Halon Compatible: Specifically recommended for areas protected by FM200 or Halon fire suppression systems, where chemical compatibility of all door components is essential.
- UL Certified Fire Door Gasketing: Certified by UL to CAN/ULC-S104 and ANSI/UL10B for hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes; also UL Certified to ANSI/UL10C for Positive Pressure applications on the same door types.
- Smoke and Draft Control: Certified 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).
- NFPA and IBC Compliance: Complies with NFPA 80, NFPA 252, and IBC requirements for fire door assemblies, supporting code-compliant door packages.
- ANSI/BHMA A156.22 Certified: Performance-tested to the American National Standard for Door Gasketing and Edge Sealing Systems, listed in the BHMA Certified Products Directory.
- Stainless Steel Fasteners Included: #6 x 3/4" stainless steel sheet metal screws are furnished with each set, eliminating the need to source separate hardware.
- Slotted Screw Holes for Adjustment: Factory-slotted holes allow field adjustment of the retainer position for a precise, consistent compression fit against the door.
- Head-and-Jamb Set Configuration: Each order ships as a matched set—one head strip and two jamb strips—cut to the selected opening size for straightforward installation on the frame stop.
- Made to Order: Produced specifically for each order; allow 10–15 business days for fabrication and shipment.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 137SDKB |
| Product Type | Silicone Dense Bulb Perimeter Weatherstrip, Head-and-Jamb Set |
| Finish | Dark Bronze (DKB) |
| Bulb Insert Material | Dense Silicone (Black), Synthetic Rubber Polymer |
| Retainer Material | Aluminum Alloy 6063, T5 Temper |
| Typical Section Profile | 7/8" x 5/16" |
| Set Components | 1 Head Strip + 2 Jamb Strips |
| 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 Method | Screw-applied to frame stop |
| Fasteners Included | #6 x 3/4" Stainless Steel Sheet Metal Screws |
| Screw Holes | Slotted for field adjustment |
| Temperature Range | −81°F to 300°F |
| Flame Resistance | Flame-Resistant |
| Moisture Resistance | Moisture-Resistant |
| Ozone / UV Resistance | Excellent Resistance to Ozone, UV, and Aging |
| Fire Suppression Compatibility | Recommended for FM200 and Halon Fire Suppression System Areas |
| UL Fire Door Certification | Certified by UL to CAN/ULC-S104 and ANSI/UL10B; Hollow Metal up to 3 Hrs., Wood up to 90 Min. |
| UL Positive Pressure Certification | Certified by UL to ANSI/UL10C; Hollow Metal up to 3 Hrs., Wood up to 90 Min.; complies with IBC, NFPA 80 and NFPA 252 |
| Smoke & Draft Control Certification | Certified by UL 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 Hrs. and Wood doors up to 90 Min. |
| BHMA Certification | ANSI/BHMA A156.22 Certified; Listed in the BHMA Certified Products Directory |
| Availability | Made to Order; 10–15 Business Day Lead Time |
Pro-Tip for Perimeter Sealing
The NGP 137SDKB is designed for surface application directly to the frame stop, making it compatible with standard hollow metal and wood door frames without mortising or routing. Take advantage of the factory-slotted screw holes to fine-tune the retainer position before final tightening, ensuring even bulb compression across the full height of both jambs and the full width of the head. Use the furnished #6 x 3/4" stainless steel sheet metal screws to resist corrosion in high-humidity or exterior-adjacent applications. For fire-rated assemblies, confirm that the installed gasketing is visible on the door schedule and labeled consistently with the UL-certified door and frame assembly to satisfy AHJ review under NFPA 80.
| 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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