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. It resists vibration, so it will flex with movement rather than crack or pull away from surfaces. Apply with a caulk gun or trowel.

Hand-mold this putty into small openings in fire-resistant walls and floors.

Often used in furnaces, these firebricks have been machined for a snug fit to minimize heat loss. They are flame resistant, meeting ASTM E84 0/0 for flame and smoke. Cut with a brick saw and install with the firebrick bonding mortar (sold separately).

Stronger than standard firebricks but with lower insulation capabilities, these withstand heavy abrasion on the floors and sides of furnaces. They meet ASTM standards for flame resistance. Also known as hard firebricks. Cut with a diamond-tipped tile saw and install with firebrick bonding mortar (sold separately).

Stack these blocks around cables or pipes that run through fire-rated walls and floors. They’re made from compactible foam, so you can pack them in tightly to create a dense barrier.

Use fire-stop caulk to seal small gaps between or around the blocks.

Squeeze these foam plugs into the ends of pipe or conduit to fill the space around cables. Cut holes in these plugs to pass cables through, or use them to block the ends of unused pipe or conduit.

Smooth this tape over holes, gaps, and seams in fire-rated walls, floors, and ceilings to form a seal. To apply, cut to size and peel off the liner.

Fill the space between plastic pipes and the fire-rated wall or floor they pass through. Collars 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.

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.

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.