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National Guard Products 137N DKB Neoprene Smoke-Rated Meeting-Edge Astragal Set – Dark Bronze
The National Guard Products (NGP) 137N DKB Neoprene Smoke-Rated Astragal Set is a two-piece meeting-edge astragal set engineered in a Dark Bronze anodized aluminum extrusion with a black neoprene EPDM insert. Designed specifically for the meeting edge of a pair of fire-rated or smoke-control doors, this astragal set delivers certified smoke, draft, and positive-pressure performance on hollow metal fire doors rated up to 3 hours and wood fire doors rated up to 90 minutes. Ordering as a set provides both pieces required to seal the full meeting edge of an active/inactive door pair — making this an essential component for commercial door assemblies subject to IBC, NFPA 80, NFPA 105, and NFPA 252 compliance requirements.
Key Features of the NGP 137N DKB Smoke-Rated Astragal Set
- UL-Certified Fire and Positive Pressure Performance: Certified by UL to ANSI/UL10B and CAN/ULC-S104 for standard fire testing, and to ANSI/UL10C for positive pressure conditions — compliant with NFPA 80 and NFPA 252 on hollow metal doors up to 3 hours and wood doors up to 90 minutes.
- Smoke and Draft Control Gasketing: Certified by UL to ANSI/UL10C and ANSI/UL1784 Category 'H'; meets IBC and NFPA 105 requirements for use on 'S'-labeled positive pressure hollow metal fire doors up to 3 hours and wood fire doors up to 90 minutes.
- High-Performance Neoprene EPDM Insert: The synthetic EPDM rubber in a polypropylene thermoplastic matrix provides very good abrasion resistance, tensile strength, and memory — maintaining a reliable seal through heavy traffic and repeated door cycles.
- Wide Temperature Range: Rated from -81°F to 275°F, this neoprene insert performs in extreme cold and heat without cracking or deforming, making it suitable for a broad range of climate conditions.
- Flame-Resistant and Moisture-Resistant: The neoprene compound resists ignition and moisture intrusion, supporting both fire-rated and weather-exposed applications at paired entry doors.
- Ozone, Sunlight, and Aging Resistant: Good resistance to environmental degradation helps preserve sealing effectiveness and appearance over the service life of the door assembly.
- Aluminum Alloy 6063, T5 Temper Extrusion: The Dark Bronze extruded aluminum body provides structural rigidity with a durable, professionally finished appearance compatible with commercial door hardware finishes.
- Slotted Screw Holes for Field Adjustment: Screw holes are slotted to allow precise positioning at the meeting edge, accommodating minor door alignment variations during installation.
- Stainless Steel Screws Furnished: #6 x 3/4" stainless steel sheet metal screws are included, providing corrosion-resistant fastening without a separate hardware purchase.
- Two-Piece Set — Both Meeting-Edge Pieces Included: Ordering the 137N DKB as a set delivers two astragal pieces — one for each leaf of the door pair — so both sides of the meeting edge are covered in a single order.
- Available in 84" and 96" Piece Heights: Select the piece height that matches your door pair height; pieces are available in standard 84-inch and 96-inch lengths to fit most commercial door openings.
- Air Infiltration Control: Recommended by NGP as a product for minimum air leakage and a tight seal at the meeting edge of paired doors, supporting energy efficiency and comfort in conditioned spaces.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 137N DKB |
| Product Type | Two-Piece Meeting-Edge Smoke-Rated Astragal Set |
| Finish | Dark Bronze (DKB) |
| Insert / Seal Material | Black Neoprene (Synthetic EPDM Rubber in Polypropylene Thermoplastic Matrix) |
| Extrusion Material | Aluminum Alloy 6063, T5 Temper |
| Typical Section Profile | 7/8" x 5/16" |
| Available Piece Heights | 84 inch and 96 inch |
| Pieces per Set | Two (2) — one per door leaf at the meeting edge |
| Fasteners Included | #6 x 3/4" Stainless Steel Sheet Metal Screws |
| Screw Hole Type | Slotted for field adjustment |
| Temperature Range | -81°F to 275°F |
| Flame Resistance | Flame-Resistant |
| Moisture Resistance | Moisture-Resistant |
| Environmental Resistance | Good resistance to ozone, sunlight, and aging |
| Abrasion / Tensile Performance | Very good abrasion resistance, tensile strength, and memory |
| UL Certifications | Certified by UL to ANSI/UL10B, CAN/ULC-S104 (standard fire); ANSI/UL10C (positive pressure); ANSI/UL1784 Category 'H' (smoke and draft control) |
| Fire Door Rating — Hollow Metal | Up to 3 hours |
| Fire Door Rating — Wood | Up to 90 minutes |
| Applicable Standards | IBC, NFPA 80, NFPA 105, NFPA 252 |
| Smoke Label | Suitable for 'S'-labeled positive pressure hollow metal and wood fire doors |
| Availability | Made to Order — Lead time approximately 10–15 business days |
Pro Tip: The 137N DKB is ordered and shipped as a two-piece set — both meeting-edge pieces are included to seal the active and inactive leaves of a door pair. Slotted screw holes allow field adjustment for precise meeting-edge alignment. Per IBC, NFPA 80, NFPA 105, and NFPA 252, the gap at the meeting edge between fire-labeled doors must not exceed 1/8". Additionally, fire-rated astragal seals such as this one cannot replace any astragal required on the door by the door manufacturer to maintain its fire label — always verify compliance with the door manufacturer's listing requirements before installation.
| Length | 84 Inch or 96 Inch |
| Brand | National Guard Products |
| Housing Finish | Dark Bronze |
| Smoke Rated | Smoke Rated |
| Weatherstripping Type | Astragal |
| Housing Size | 7/8" x 5/16" |
| Insert Color | Black |
| Fasteners | #6 x 3/4" Stainless Steel SMS |
| Set Type | Two-piece meeting-edge set |
| Fire Rated | Fire Rated |
| Insert Material | Neoprene |
| Mounting Type | Screw Applied - Exp Screw, Surface Mounted |
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