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National Guard Products 134N DKB Neoprene Bulb Perimeter Weatherstrip Head-and-Jamb Set – Dark Bronze
The National Guard Products (NGP) 134N DKB is a Neoprene Bulb Perimeter Weatherstrip head-and-jamb set finished in Dark Bronze anodized aluminum with a black neoprene bulb insert. Engineered for commercial and institutional openings, this screw-applied perimeter seal mounts directly to the frame stop, delivering a continuous, compression-fit barrier against air infiltration, smoke, drafts, and moisture on all three sides of the door opening. Sold as a complete set — one head piece and two jamb legs — 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. Because each set is cut and assembled to the ordered opening size, the 134N DKB is a made-to-order product with a lead time of approximately 10–15 business days. It carries UL fire-door certifications under both non-positive and positive pressure standards, making it a code-compliant choice for fire-rated hollow metal and wood door assemblies.
High-Performance Neoprene Bulb Weatherstrip Features
- Fire-Door Certified (Non-Positive Pressure): UL-certified to CAN/ULC-S104 and ANSI/UL 10B, 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.
- Positive Pressure Fire-Door Certified: UL-certified to ANSI/UL 10C, complying with IBC, NFPA 80, and NFPA 252 — suitable for positive pressure hollow metal assemblies up to 3 hours and wood doors up to 90 minutes.
- Smoke and Draft Control Gasketing: Certified by UL to ANSI/UL 10C and ANSI/UL 1784 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.
- BHMA Certified Performance: Complies with ANSI/BHMA A156.22, 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.
- Exceptional Weather Resistance: The EPDM rubber compound in a polypropylene thermoplastic matrix delivers good resistance to ozone, sunlight, and aging, keeping the seal effective over the life of the door opening.
- Wide Temperature Range: Rated from -81°F to 275°F, making this perimeter seal suitable for exterior openings in extreme climates as well as high-temperature-adjacent fire-rated corridors.
- Flame and Moisture Resistant: The neoprene bulb compound is both flame-resistant and moisture-resistant, resisting deterioration in wet or high-humidity environments such as exterior entries, vestibules, and stairwells.
- Very Good Abrasion Resistance, Tensile Strength, and Memory: The neoprene bulb returns to its original profile after compression, maintaining a consistent seal across thousands of door cycles.
- Air Infiltration Control: Recommended by NGP as a minimum air-leakage product, creating a tight seal around the full perimeter of the door to reduce energy loss and improve HVAC efficiency.
- Dark Bronze Aluminum Extrusion: The carrier is extruded from Aluminum Alloy 6063, T5 Temper in a Dark Bronze finish — a popular architectural finish that coordinates with dark bronze door frames, closers, and exit hardware on commercial projects.
- Furnished Stainless Steel Fasteners: #6 x 3/4" stainless steel sheet metal screws are included, providing corrosion resistance for exterior and high-humidity installations.
- Slotted Screw Holes for Field Adjustment: Screw holes are slotted, allowing in-field adjustment of the seal position to achieve optimal compression against the door face without removing and re-drilling.
- Complete Head-and-Jamb Set: One head piece and two jamb legs are supplied per set, sized to the ordered opening, eliminating field measuring and cutting for the three sealing sides.
- Made-to-Order Availability in Five Sizes: Ordered to the specific opening — 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 — for a precise, professional installation with no material waste.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model | 134N DKB |
| Product Type | Neoprene Bulb Perimeter Weatherstrip Head-and-Jamb Set |
| Finish | Dark Bronze |
| Insert / Seal Material | Black Neoprene (EPDM Rubber in Polypropylene Thermoplastic Matrix) |
| Carrier Material | Aluminum Alloy 6063, T5 Temper |
| Typical Profile Section | 7/8" x 5/16" |
| Application / Mounting | Screw-applied to the door frame stop |
| Set Configuration | 1 Head + 2 Jambs (three-sided 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 |
| Fasteners Furnished | #6 x 3/4" Stainless Steel Sheet Metal Screws (included) |
| Screw Holes | Slotted for field adjustment |
| Temperature Range | -81°F to 275°F |
| Flame Resistance | Flame-Resistant |
| Moisture Resistance | Moisture-Resistant |
| Ozone / UV Resistance | Good Resistance to Ozone, Sunlight, and Aging |
| Abrasion / Tensile / Memory | Very Good Abrasion Resistance, Tensile Strength, and Memory |
| UL Fire-Door Certification (Non-Positive Pressure) | Certified to CAN/ULC-S104 and ANSI/UL 10B; complies with NFPA 80 and NFPA 252 — Hollow Metal up to 3 hrs., Wood up to 90 min. |
| UL Fire-Door Certification (Positive Pressure) | Certified to ANSI/UL 10C; complies with IBC, NFPA 80 and NFPA 252 — Hollow Metal up to 3 hrs., Wood up to 90 min. |
| Smoke & Draft Control | Certified by UL to ANSI/UL 10C and ANSI/UL 1784 Category 'H'; complies with IBC and NFPA 105 — 'S'-labeled Positive Pressure Hollow Metal up to 3 hrs., Wood up to 90 min. |
| BHMA Certification | ANSI/BHMA A156.22 Certified; listed in the BHMA Certified Products Directory; includes performance tests for heat and cold |
| Availability | Made to Order — approximately 10–15 business day lead time |
Pro-Tip for Perimeter Sealing
The NGP 134N DKB is designed for surface application directly to the door frame stop. The furnished #6 x 3/4" stainless steel sheet metal screws secure the aluminum carrier, and the slotted screw holes allow the installer to shift the profile inward or outward to dial in the correct compression of the neoprene bulb against the door face before final tightening. For fire-rated openings, always verify that the door, frame, and all hardware are listed together as a compliant assembly under the applicable UL certification (ANSI/UL 10B for non-positive pressure or ANSI/UL 10C for positive pressure) and that installation follows the requirements of NFPA 80 and the authority having jurisdiction (AHJ).
| 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 | Neoprene |
| Mounting Type | Screw Applied - Exp Screw, Surface Mounted |
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