Easy to apply and quick to set, this caulk is a popular choice for sealing small openings in fire-resistant walls and floors. It’s often used to line seams or fill gaps around cables or pipes that run between rooms. You can use it alone or with other fire-stop products. This caulk is tested to ASTM and UL standards for stopping the spread of smoke and flames. It resists vibration, so it will flex with movement rather than crack or pull away from surfaces. Apply with a caulk gun or trowel.

Acrylic caulk is water-based, which is the most common formula for fire-stop caulk. It’s a good choice for most applications. Expandable caulk is used to seal the area around PVC pipes, cables, and other equipment that can melt or shrink during a fire. When it’s heated, it expands to fill gaps.

Fill the space between plastic pipes and the fire-rated wall or floor they pass through. These collars are tested to ASTM and UL standards for preventing the spread of smoke and flames. They expand when heated, so they’ll fill any gaps left if your pipe melts or shrinks. Slip a collar over the end of your pipe and press into the opening in the wall or floor. If your pipe runs through a wall, seal both sides.

Seal electrical boxes to maintain fire-resistant walls. These inserts mount inside electrical boxes to block the spread of smoke and flames. When heated, they expand to seal gaps, such as those left by melted wire. They fit common box sizes.

Use gaskets when cable or switches have already been installed. They sit just inside your cover plate.

Use pads before cable is installed. The adhesive side sticks to the back wall of your electrical box. They can be used only with metallic boxes.

Cut these sheets to any size and shape you need to seal large openings in fire-resistant walls and floors. They’re often used to fill the space around pipes, conduit, and ducts. These sheets are tested to ASTM and UL standards for stopping the spread of smoke and flames. Made of steel, they have a firestop coating that expands when it’s heated. If the equipment passing through these panels melts or shrinks during a fire, this coating will fill the gaps.

Use shears to cut these panels to size, then fasten to your surface with No. 10 self-drilling sheet metal screws (not included). Fill any gaps around the sheet with fire-stop caulk (sold separately) for a tight seal. Once they’re installed, you can paint over them without losing fire protection.

Squeeze these foam plugs into the ends of pipe or conduit to fill the space around cables. When heated, they expand to fill any gaps left if the cables shrink or melt. They’re tested to ASTM and UL standards for stopping the spread of smoke and flames. Cut holes in these plugs to pass cables through, or use them to block the ends of unused pipe or conduit. Once they’re installed, you can paint them without losing fire protection.