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National Guard Products 134SDKB Silicone Dense Bulb Perimeter Weatherstrip Head-and-Jamb Set, Dark Bronze
National Guard Products (NGP) model 134SDKB is a silicone dense bulb perimeter weatherstrip head-and-jamb set finished in Dark Bronze with a black closed-cell silicone sponge bulb insert. Each set includes one head piece and two jamb pieces, sized and cut to fit your opening, and is screw-applied directly to the frame stop to create a tight, compression seal around the full perimeter of the door. The 134SDKB is engineered to deliver exceptional air infiltration control, smoke and draft containment, and UL-certified fire door performance on both hollow metal and wood fire-rated door assemblies. Five 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 — and every set is made to order with a lead time of 10–15 business days.
High-Performance Silicone Bulb Weatherstrip Features
- Aluminum Alloy 6063-T5 Retainer: Extruded from Alloy 6063, T5 Temper aluminum for a rigid, corrosion-resistant carrier that holds its shape over years of heavy door cycling.
- Closed-Cell Silicone Sponge Bulb: The synthetic rubber polymer bulb is a closed-cell sponge construction that provides excellent flexibility and memory, springing back to its original profile after every door closure for a consistent, airtight seal.
- Extreme Temperature Stability: Rated from -81°F to 300°F, the silicone insert remains flexible and functional in both severe cold and high-heat environments where standard vinyl or neoprene gaskets can stiffen or degrade.
- Flame-Resistant and Moisture-Resistant: The silicone compound resists ignition and repels moisture, making it suitable for fire-rated openings and humid or wet-area applications.
- Superior UV, Ozone, and Aging Resistance: Silicone's molecular stability means the bulb will not crack, harden, or discolor from prolonged UV or ozone exposure, preserving both performance and appearance.
- FM200 and Halon Compatible: Specifically recommended for facilities that use FM200 or Halon fire suppression systems, where gasket material compatibility with suppression agents is a code and insurance requirement.
- UL-Certified Fire Door Rating: Certified by UL to CAN/ULC-S104, ANSI/UL10B, and ANSI/UL10C (Positive Pressure); 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.
- 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 up to 3 hours and wood fire doors up to 90 minutes.
- ANSI/BHMA A156.22 Certified: Tested and certified to the American National Standard for Door Gasketing and Edge Sealing Systems, including BHMA performance tests for heat and cold, and listed in the BHMA Certified Products Directory.
- Head-and-Jamb Set Configuration: Sold as a complete three-piece perimeter set (one head, two jambs) pre-cut to your specified opening size, eliminating field measuring and cutting errors.
- Five Opening Sizes Available: Choose from 3'0 x 7'0, 4'0 x 7'0, 6'0 x 7'0, 6'0 x 8'0, or 8'0 x 8'0 to match standard and oversized door openings including single, double, and large commercial frames.
- Made to Order: Each set is custom-produced to your specified opening; allow 10–15 business days for production and shipment.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 134SDKB |
| Product Type | Silicone Dense Bulb Perimeter Weatherstrip Head-and-Jamb Set |
| Finish | Dark Bronze (DKB) |
| Insert / Bulb Material | Black Closed-Cell Silicone Sponge (Synthetic Rubber Polymer) |
| Retainer Material | Aluminum Alloy 6063, T5 Temper |
| Typical Section Profile | 7/8" x 5/16" |
| Set Contents | 1 Head piece + 2 Jamb pieces (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 Method | Screw-applied to the frame stop |
| 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 Door Rating — Standard Pressure | UL Certified to CAN/ULC-S104 and ANSI/UL10B; NFPA 80 and NFPA 252 compliant; Hollow Metal up to 3 Hours, Wood up to 90 Minutes |
| Fire Door Rating — Positive Pressure | UL Certified to ANSI/UL10C; IBC, NFPA 80, and NFPA 252 compliant; Hollow Metal up to 3 Hours, Wood up to 90 Minutes |
| Smoke and Draft Control | UL Certified to ANSI/UL10C and ANSI/UL1784 Category 'H'; IBC and NFPA 105 compliant; 'S' labeled Positive Pressure Hollow Metal up to 3 Hours, Wood up to 90 Minutes |
| BHMA Certification | ANSI/BHMA A156.22 Certified; Listed in BHMA Certified Products Directory |
| Fire Suppression Compatibility | Recommended for FM200 and Halon fire suppression systems |
| Additional Properties | Flame-Resistant, Moisture-Resistant, UV-Resistant, Ozone-Resistant |
| Availability | Made to Order — 10 to 15 Business Day Lead Time |
Pro-Tip for Perimeter Sealing
The NGP 134SDKB is surface-applied directly to the frame stop on the head and both jambs of the door frame. The slotted screw holes allow the retainer to be shifted slightly during installation so the silicone bulb compresses evenly against the door face for a uniform seal across the full perimeter. Use the furnished #6 x 3/4" stainless steel sheet metal screws to ensure corrosion resistance at the fastener points — a critical detail on fire-rated and smoke-control openings where hardware integrity is part of the listed assembly. On positive-pressure fire door assemblies, confirm the frame and door are within the manufacturer's tolerances before installation to ensure the UL-listed performance is maintained.
| 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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