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National Guard Products 137NA Neoprene Bulb Perimeter Weatherstrip Set – Anodized Aluminum
National Guard Products (NGP) model 137NA is a neoprene bulb perimeter weatherstrip head-and-jamb set finished in anodized aluminum with a black neoprene bulb insert. Each set includes one head piece and two jamb pieces, sized to fit the complete door frame perimeter and screw-applied directly to the frame stop. Designed for commercial hollow metal and wood door openings, the 137NA delivers a tight, compression seal around the full perimeter — reducing air infiltration, blocking smoke and draft, and meeting rigorous UL fire-door certification requirements. The set is available in five standard opening sizes and is made to order with a lead time of 10–15 business days.
High-Performance Weatherstrip Features
- Aluminum Alloy Frame Body: Extruded from Alloy 6063, T5 temper for a rigid, dimensionally stable retainer that holds its profile over the life of the door.
- Neoprene Bulb Seal: The bulb insert is manufactured from synthetic EPDM rubber in a polypropylene thermoplastic matrix, offering very good abrasion resistance, tensile strength, and memory so the seal rebounds reliably after every door cycle.
- Flame- and Moisture-Resistant: The neoprene compound is flame-resistant and moisture-resistant, maintaining sealing integrity in demanding building environments.
- Wide Temperature Range: Rated from -81°F to 275°F, making the 137NA suitable for exterior applications subject to extreme cold or heat loading.
- Ozone, Sunlight, and Aging Resistance: Good resistance to ozone, UV sunlight, and long-term aging keeps the bulb pliable and effective throughout the door assembly's service life.
- UL Fire-Door Certified (Standard Pressure): Certified by UL to CAN/ULC-S104 and ANSI/UL10B; 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.
- UL Positive Pressure Certified: Certified by UL to ANSI/UL10C; complies with IBC, 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 rated up to 3 hours and wood fire doors rated up to 90 minutes.
- BHMA Certified Performance: Certified to ANSI/BHMA A156.22 performance tests for heat and cold, and listed in the BHMA Certified Products Directory.
- Air Infiltration Control: Recommended for minimum air leakage and a tight perimeter seal around commercial door openings.
- Stainless Steel Fasteners Furnished: #6 x 3/4" stainless steel sheet metal screws are included with every set.
- Slotted Screw Holes: Factory-slotted screw holes allow field adjustment for precise fit against the door face.
- Five Standard Opening Sizes: Available as a complete head-and-jamb set 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 configurations.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 137NA |
| Product Type | Neoprene Bulb Perimeter Weatherstrip Head-and-Jamb Set |
| Finish | Anodized Aluminum |
| Seal / Insert Color | Black Neoprene |
| Frame Body Material | Aluminum Alloy 6063, T5 Temper |
| Seal Material | Synthetic EPDM Rubber in Polypropylene Thermoplastic Matrix |
| Typical Profile Section | 7/8" x 5/16" |
| Set Configuration | 1 Head + 2 Jambs (full 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 Included | #6 x 3/4" Stainless Steel Sheet Metal Screws |
| Screw Holes | Slotted for field adjustment |
| Temperature Range | -81°F to 275°F |
| Flame Resistance | Yes |
| Moisture Resistance | Yes |
| UL Fire-Door Listing (Standard Pressure) | Certified to CAN/ULC-S104 and ANSI/UL10B; NFPA 80 and NFPA 252 — Hollow Metal up to 3 Hrs., Wood up to 90 Min. |
| UL Positive Pressure Listing | Certified to ANSI/UL10C; IBC, NFPA 80 and NFPA 252 — Hollow Metal up to 3 Hrs., Wood up to 90 Min. |
| Smoke & Draft Control | Certified to ANSI/UL10C and ANSI/UL1784 Category 'H'; 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; Listed in BHMA Certified Products Directory |
| Availability | Made to Order |
| Lead Time | 10–15 Business Days |
Pro-Tip for Perimeter Sealing
The NGP 137NA is surface-applied directly to the frame stop on the head and both jambs, forming a continuous neoprene bulb seal around the full door perimeter. The factory-slotted screw holes allow you to shift the retainer slightly during installation so the bulb makes consistent contact with the door face before you lock down the furnished #6 x 3/4" stainless steel sheet metal screws. For fire-rated and smoke-listed openings, verify that the door and frame assembly carry the appropriate UL label to match the 137NA's certifications — the weatherstrip alone does not confer a fire rating on an unlisted opening.
| Gasketing Set Size | 3'0 x 7'0 Set or 4'0 x 7'0 Set or 6'0 x 7'0 Set |
| Brand | National Guard Products |
| Housing Finish | Aluminum |
| 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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