Seal openings in fire-resistant floors and walls to stop the spread of smoke and flames. Often used to fill gaps around pipes or conduit, this cement forms a rigid, tight-fitting shield. It’s heavier and messier to apply than fire-stop blocks or sheets, but it's an economical choice for covering a large area. You can also paint over this cement once it dries.

This cement comes as a powder—mix in water until you reach the consistency you need. The thicker the cement, the better it will stick to walls; thinner cement dries with a smoother finish on floors.

Cement in a pail is best for small, infrequent jobs. The pail is resealable and has a carrying handle.

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.

Smooth this tape over holes, gaps, and seams in fire-rated walls, floors, and ceilings to form a seal. It’s tested to ASTM and UL standards for stopping the spread of smoke and flames. It’s also watertight, so it prevents leaks if you need to extinguish a fire. Designed to resist vibration, this tape flexes with movement rather than cracking or pulling away from surfaces. To apply, cut to size and peel off the liner.

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.

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. If a fire breaks out, they expand to seal any remaining gaps. These blocks are tested to ASTM and UL standards for stopping the spread of smoke and flames.

Blocks with hook and loop attachment strips can be locked together or taken apart easily, so they're good for creating temporary barriers. Their cover expands in two directions when exposed to flames. Do not cut these blocks, or they will lose their shape and fail to stop fire and smoke.

Cut-to-size blocks can be customized to fill odd-shaped openings. They expand in all directions when exposed to flames, so you can cut them without reducing their fire protection.

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

Seal glass windows in metal and wood fire-rated doors. Also known as glazing tape, it has an adhesive back with a peel-off liner.

Made of EPDM foam, these seals resist water, sunlight, and ozone while also meeting transportation industry standards for flames, smoke, and toxicity. Softer and more flexible than EPDM rubber seals, they conform to uneven surfaces to guard against dust, noise, and vibration. The foam has a closed-cell construction, which resists absorption.

No need to drill mounting holes, this weatherstripping has a peel-and-stick adhesive backing. Mount it to the sides and top of a door or window frame to seal gaps. The adhesive is made of acrylic for a waterproof and weatherproof bond.

Bulb seals conform to doors, compensating for irregular surfaces. They restrict airflow better than flat seals. Made of silicone, they withstand high temperatures and UV rays.

Finned seals have two flat fins that create multiple sealing points against a door. They compensate for uneven surfaces better, insulate better, and last longer than flat seals. Made of TPE, they resist UV rays like silicone bulb seals and withstand abrasion, tears, and solvents better. However, TPE will deteriorate and crack at temperatures above 250° F.

Flat seals are made of a graphite/rubber blend, which expands by as much as 10 times their original thickness in extreme heat to completely seal out flames. Also known as intumescent seals, they’re commonly used in fire doors, which often have a built-in groove shaped to fit them.

V-strip seals are made of stiff, folded material. One arm mounts to your door frame while the other presses firmly against the door to block airflow. They’re also known as tension seals. Bronze seals are durable and corrosion resistant, and often used on historical buildings to match the existing design. Stainless steel seals are stronger than rubber ones and more corrosion resistant than bronze ones. Often used in marine environments and food plants, they won’t degrade from contact with mild chemicals or detergents.

Seals that meet UL 1784 are rated for use as smoke and draft control gaskets.