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National Guard Products 133NA Neoprene Sponge Perimeter Weatherstrip Head-and-Jamb Set – Anodized Aluminum
The National Guard Products (NGP) 133NA is a perimeter weatherstrip head-and-jamb set featuring a patent-pending microcellular EPDM neoprene sponge seal housed in an anodized aluminum retainer. Sold as a complete set — one head piece and two jamb pieces — and available in five 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), the 133NA screw-applies directly to the door frame stop to create a continuous, tight perimeter seal against air infiltration, moisture, smoke, and flame. This is a made-to-order product with a lead time of 10–15 business days.
High-Performance Perimeter Weatherstrip Features
- Patent-Pending Microcellular EPDM Seal: Constructed from a Synthetic EPDM Rubber in a Polypropylene Thermoplastic Matrix Closed Cell Advanced Elastomeric Foam for superior resilience and long-term compression recovery.
- Exceptional Memory and Tensile Strength: Engineered with very good abrasion resistance, tensile strength, and memory — the seal returns to its original shape cycle after cycle, maintaining a consistent perimeter barrier.
- Wide Temperature Performance: Rated for a temperature range of -81°F to 275°F, making it suitable for exterior door applications in extreme climates.
- Flame-Resistant and Moisture-Resistant: The EPDM foam compound is both flame-resistant and moisture-resistant, supporting the product's fire door certifications and long service life.
- Ozone, Sunlight, and Aging Resistance: Good resistance to ozone, UV exposure, and general environmental aging helps the seal maintain its integrity in demanding conditions.
- UL Fire Door Certified (Standard and Positive Pressure): Certified by UL to CAN/ULC-S104 and ANSI/UL10B, and Positive Pressure certified by UL to ANSI/UL10C — compliant 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 rated up to 3 hours and wood fire doors up to 90 minutes.
- ANSI/BHMA A156.22 Certified: Certified gasketing complies with the American National Standard for Door Gasketing and Edge Sealing Systems and is 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, resisting corrosion for reliable long-term installation.
- Slotted Screw Holes for Field Adjustment: Screw holes are slotted so installers can fine-tune seal compression after initial mounting without re-drilling.
- Durable Anodized Aluminum Retainer: Extruded from Aluminum Alloy 6063, T5 Temper and finished in anodized aluminum — corrosion-resistant and architecturally clean.
- Black Seal Color: The neoprene sponge insert is black, complementing both standard and dark-finish door frames.
Technical Details
| Manufacturer | National Guard Products (NGP) |
| Model Number | 133NA |
| Product Type | Perimeter Weatherstrip Head-and-Jamb Set |
| Finish | Anodized Aluminum |
| Seal Material | Synthetic EPDM Rubber in Polypropylene Thermoplastic Matrix Closed Cell Advanced Elastomeric Foam (Microcellular EPDM – Patent Pending) |
| Seal Color | Black |
| Retainer Material | Aluminum Alloy 6063, T5 Temper |
| Profile Section (Nominal) | 15/16" x 5/16" |
| Set Configuration | 1 Head + 2 Jambs |
| 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 door frame stop |
| Fasteners | #6 x 3/4" Stainless Steel Sheet Metal Screws (furnished) |
| Screw Holes | Slotted for field adjustment |
| Temperature Range | -81°F to 275°F |
| Fire Rating – Standard Pressure | UL Certified to CAN/ULC-S104 and ANSI/UL10B; NFPA 80 and NFPA 252 compliant – Hollow Metal up to 3 hrs., Wood up to 90 min. |
| Fire Rating – Positive Pressure | UL Certified to ANSI/UL10C; IBC, NFPA 80 and NFPA 252 compliant – Hollow Metal up to 3 hrs., Wood up to 90 min. |
| Smoke and Draft Control | UL Certified to ANSI/UL10C and ANSI/UL1784 Category 'H'; IBC and NFPA 105 compliant for 'S'-labeled Positive Pressure Hollow Metal doors up to 3 hrs., Wood doors up to 90 min. |
| BHMA Certification | ANSI/BHMA A156.22 Certified; listed in the BHMA Certified Products Directory |
| Special Properties | Flame-Resistant, Moisture-Resistant; Good Resistance to Ozone, Sunlight, and Aging |
| Stocking Status | Made to Order |
| Lead Time | 10–15 Business Days |
Pro-Tip for Perimeter Sealing
The NGP 133NA mounts directly to the door frame stop using the furnished #6 x 3/4" stainless steel sheet metal screws. Because the screw holes are slotted, you can shift the retainer slightly inward or outward after the initial pass to dial in the correct seal compression against the door face — no re-drilling required. When installing a head-and-jamb set on a fire-rated opening, verify that the door leaf and frame assembly carry the appropriate label to match the strip's UL certifications. For smoke-and-draft-controlled openings, confirm the door is 'S'-labeled Positive Pressure rated before specifying this product to satisfy IBC and NFPA 105 requirements.
| 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 | Aluminum |
| Smoke Rated | Smoke Rated |
| Weatherstripping Type | Perimeter Gasketing |
| Housing Size | 15/16" 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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