ASTM G21 Fire Stops | McMaster-Carr

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19 Products

Fire-Stop Putty

Pad

Stick

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

Pads—Putty pads are often used to seal the area around electrical boxes. Mold them onto the sides of the box before installing it in a wall or floor.

Expandable—Often used to seal the area around PVC pipes or cables, it expands when heated to fill the gaps left if your equipment melts.

Flammability Rating—This putty is tested to ASTM and UL standards to stop the spread of smoke and flames.

												Each		Package
Form	Lg.	Wd.	Thk.	Color	Application Temp., ° F	Fire-Stop Application	Fire Safety Rating	Flammability Rating	Specs. Met	Certification	Performance		Each	Pkg. Qty.		Pkg.



	Pad	7"	7"	1/8"	Red	40 to 120	Through Penetration	3 hr.	ASTM E84 10/125 for Flame and Smoke, ASTM E119, UL 263, UL 723 10/125 for Flame and Smoke, UL 1479	ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	Expandable, Fire Rated	9340K22	00000	20	9340K24	0000000


	Stick	10"	1 1/2"	1 1/2"	Red	40 to 120	Through Penetration	3 hr.	ASTM E84 10/125 for Flame and Smoke, ASTM E119, UL 263, UL 723 10/125 for Flame and Smoke, UL 1479	ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	Expandable, Fire Rated	9340K23	00000	12	9340K25	000000

Fire-Stop Caulk

Caulk

Spray-On Caulk

Cartridge

Pail

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.

Spray On—Spray-on caulk is used to evenly coat hard-to-reach openings. It’s often used to seal the spaces where fire-rated walls, floors, and ceilings meet.

Acrylic Plastic—Acrylic plastic caulk is water-based, which is the most common formula for fire-stop caulk. It’s a good choice for most applications.

Silicone Rubber—Silicone rubber caulk forms a watertight, flexible seal. Use it to seal openings that are exposed to weather, washdowns, or standing water.

Expandable—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.

Flammability Rating—This caulk is tested to ASTM and UL standards for stopping the spread of smoke and flames.

	Container
	Size	Type	Application Temp., ° F	Color	Fire Safety Rating	Flammability Rating	Specs. Met	Certification		Each
Caulk







				Acrylic Plastic—Expandable

				10.3 fl. oz.	Cartridge	40 to 120	Red	4 hr.	ASTM E84 0/0 for Flame and Smoke, ASTM E119, ASTM E1966, UL 263, UL 723 0/0 for Flame and Smoke, UL 1479, UL 2079	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	93465K11	000000


				30 fl. oz.	Cartridge	40 to 120	Red	4 hr.	ASTM E84 0/0 for Flame and Smoke, ASTM E119, ASTM E1966, UL 263, UL 723 0/0 for Flame and Smoke, UL 1479, UL 2079	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	93465K12	00000
				5 gal.	Pail	40 to 120	Red	4 hr.	ASTM E84 0/0 for Flame and Smoke, ASTM E119, ASTM E1966, UL 263, UL 723 0/0 for Flame and Smoke, UL 1479, UL 2079	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	93465K14	000000




						Silicone Rubber—Watertight

						4.5 gal.	Pail	-35 to 140	Gray	4 hr.	ASTM E84 5/45 for Flame and Smoke, ASTM E119, ASTM E1966, UL 263, UL 723 5/45 for Flame and Smoke, UL 1479, UL 2079	ASTM C920, ASTM E90, ASTM E814, ASTM E1399, ASTM G21, ULC-S115	FM Approved	93455K48	000000


						Spray-On Caulk







										Acrylic Plastic

										5 gal.	Pail	40 to 120	Red	3 hr.	ASTM E84 0/0 for Flame and Smoke, ASTM E119, ASTM E1966, UL 263, UL 723 0/0 for Flame and Smoke, UL 1479, UL 2079	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	93455K56	000000

Fire-Stop Plugs

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.

Expandable—When heated, plugs expand to fill any gaps left if the cables shrink or melt.

Paintable—Once they’re installed, you can paint them without losing fire protection.

Specifications Met—Plugs are tested to ASTM and UL standards for stopping the spread of smoke and flames.

						Each		Package
	Dia.	Thk.	Color	Fire Safety Rating	Specs. Met		Each	Pkg. Qty.		Pkg.
Expandable, Fire Rated, Paintable



		2"	3"	Red	2 hr.	ASTM E90, ASTM E814, ASTM G21, ULC-S115	1414N32	000000	10	1414N42	0000000


		4"	3"	Red	2 hr.	ASTM E90, ASTM E814, ASTM G21, ULC-S115	1414N34	00000	10	1414N44	000000

Fire-Stop Electrical Box Inserts

Seal electrical boxes to maintain fire-resistant walls. These inserts mount inside electrical boxes to block the spread of smoke and flames. They fit common box sizes.

Pads

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.

Expandable—When heated, they expand to seal gaps, such as those left by melted wire.

												Each		Package
Outlet Box Designation	Lg.	Wd.	Thk.	Mount Type	Application Temp., ° F	Fire-Stop Application	Fire Safety Rating	Flammability Rating	Specs. Met	Certification	Performance		Each	Pkg. Qty.		Pkg.



	1 Gang	1 13/16"	2 13/16"	1/4"	Adhesive Back	40 to 120	Through Penetration	2 hr.	ASTM E84 5/5 for Flame and Smoke, ASTM E119, UL 263, UL 723 5/5 for Flame and Smoke, UL 1479	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	Expandable, Fire Rated	8505N124	00000	50	8505N125	0000000


	2 Gang	3 3/4"	3 11/16"	1/4"	Adhesive Back	40 to 120	Through Penetration	2 hr.	ASTM E84 5/5 for Flame and Smoke, ASTM E119, UL 263, UL 723 5/5 for Flame and Smoke, UL 1479	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	Expandable, Fire Rated	8505N126	0000	50	8505N127	000000
	2 Gang	4 3/8"	4 3/8"	1/4"	Adhesive Back	40 to 120	Through Penetration	2 hr.	ASTM E84 5/5 for Flame and Smoke, ASTM E119, UL 263, UL 723 5/5 for Flame and Smoke, UL 1479	ASTM E90, ASTM E814, ASTM G21, ULC-S101, ULC-S102, ULC-S115	FM Approved	Expandable, Fire Rated	8505N128	00000	50	8505N129	000000