Overview
The Nelson AA0835P04 4″ Firestop Plug is a box of 6 fire barrier plugs designed to seal and protect penetrations in walls, floors, and ceilings. Made from intumescent polyurethane material, these red plugs expand when exposed to heat, creating a protective seal that prevents fire and smoke spread. Each plug offers a proven 2-hour fire rating, making them suitable for residential, commercial, and industrial applications requiring fire protection compliance.
Key Features
- Intumescent polyurethane construction expands under heat to seal penetrations
- 2-hour fire rating provides robust fire barrier protection
- Lightweight at 0.47 lbs per unit for easy handling and installation
- 4.7-inch depth accommodates standard wall and floor thicknesses
- Reusable and removable design allows cable or conduit adjustment
- Compatible with electrical, HVAC, plumbing, and low-voltage penetrations
Technical Specifications
- Part Number: AA0835P04
- Quantity per Box: 6 plugs
- Plug Diameter: 4 inches
- Depth: 4.7 inches
- Material: Intumescent polyurethane
- Color: Red
- Weight per Unit: 0.47 lbs
- Fire Rating: 2 hours (ASTM E814, UL 1479 compliant)
- Operating Temperature Range: Up to 130°F continuous
- Expansion Temperature: 350°F
- Standards: ASTM E814, UL 1479, CAN/ULC-S115
Typical Applications
Nelson AA0835P04 firestop plugs are used in:
- Electrical conduit and cable penetrations
- HVAC ductwork and pipe sleeves
- Plumbing and water supply lines
- Low-voltage communication and data cables
- Blank openings in fire-rated walls and floors
- Fire separation walls and compartmentalization systems
Compatibility & Replacements
Compatible With
- Standard 4-inch diameter openings and conduit sleeves
- Concrete, gypsum, and masonry wall construction
- Commercial and residential fire-rated assembly systems
- Fire-rated door frames and wall penetrations
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or fire protection engineer before ordering. The Nelson AA0835P04 is a direct replacement for previous Nelson 4-inch firestop plug versions using the same intumescent polyurethane formula.
Works With
- Nelson firestop caulks, sealants, and sprays for complete penetration sealing
- Standard fire-rated wall and floor assembly systems
- Building codes and fire-rating certification protocols (UL, ASTM, IBC)
