NGP 5050 Silicone Bulb Fire & Smoke Door Seal – 300 ft Roll

The National Guard Products (NGP) 5050 Silicone Bulb Seal is a high-performance perimeter gasketing solution designed to provide reliable fire and smoke protection at commercial door assemblies. Sold in a convenient 300-foot roll, this seal is engineered for use on door perimeters where controlling the passage of smoke, draft, and flames is a code-critical requirement.

The flexible silicone bulb profile compresses evenly against the door stop or frame, creating a continuous, positive seal around the door perimeter. Silicone construction delivers superior resistance to temperature extremes, UV exposure, and repeated door cycles — making it well-suited for high-traffic commercial, institutional, and industrial openings.

Key Benefits

• Fire & Smoke Barrier: Engineered for use on fire-rated door assemblies where perimeter sealing is required to limit smoke and draft migration.
• Silicone Bulb Profile: Compressible bulb design creates a positive, consistent seal along the full door perimeter — head, jambs, and meeting stiles.
• 300 ft Roll: Bulk roll format reduces waste and is cost-effective for new construction projects, renovation work, or maintenance inventories.
• Temperature & UV Resistant: Silicone material withstands harsh environmental conditions, including both high and low temperature extremes common in exterior and interior commercial applications.
• Long Service Life: Resists compression set and degradation, maintaining seal integrity through repeated door operations.

Applications

• Commercial and institutional fire-rated door assemblies (corridors, stairwells, tenant separation walls)
• Perimeter sealing on smoke barrier doors and smoke partition doors
• Healthcare, education, hospitality, and multi-family residential fire door upgrades
• New construction hardware schedules and retrofit/replacement of worn or damaged perimeter gasketing
• Any opening where a UL-listed or code-compliant door perimeter seal is specified

Fire Door Perimeter Seal — Code Context

Per NFPA 80, maximum allowable clearance between a fire door and frame at the head and jambs is 1/8 inch (3.2 mm) for wood doors and 3/16 inch (4.8 mm) for hollow metal doors. Listed gasketing products — such as the NGP 5050 — are an accepted method for addressing excessive clearances and are commonly specified to meet fire door inspection requirements. Annual fire door assembly inspections (required under NFPA 80 where NFPA 101 or IFC editions are enforced) frequently cite perimeter clearance as a deficiency; installing listed perimeter seals is a code-compliant corrective action.

Technical Details