Fire Stop Putty | McMaster-Carr

	Color Color

	Red
	Gray
	Light Red

	Fire-Stop Type Fire-Stop Type

Putty

Caulk

Cement

	Thickness Thickness

1/8"

1 1/2"

	Width Width

1 1/2"

	Length Length

10"

	Form Form

Stick

Pad

	Container Type Container Type

Cartridge

Pail

Bag

	Fire Rating Fire Rating

3 hrs.

4 hrs.

	Maximum Application Temperature Maximum Application Temperature

	Expanding Expanding

Yes

	Specifications Met Specifications Met

UL 1479

UL 263

UL 2079

	Minimum Application Temperature Minimum Application Temperature

-35° F

-20° F

40° F

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Container Size Container Size

11 Products

Fire-Stop Putty

Pad

Stick

Hand-mold this putty to fill small openings in fire-resistant walls and floors. It expands when heated and forms an insulating char that fills gaps left by melted pipes.

The pad is commonly used to seal openings around electrical boxes.

Form	Lg.	Wd.	Thick.	Color	Application Temperature, °F	Fire Rating, hrs.	Specifications Met		Each
Pad	7"	7"	1/8"	Red	40° to 120°	3	UL 1479, UL 263	0000000	00000
Stick	10"	1 1/2"	1 1/2"	Red	40° to 120°	3	UL 1479	0000000	00000

Paintable Fire-Stop Caulk

Cartridge

Pail

Seal small openings in fire-resistant walls and floors. Dispense cartridges using a caulk gun.

Expanding caulk expands when heated to fill voids left by melted pipes.

Caulk
Container Size	Application Temperature, ° F	Color	Fire Rating, hrs.	Specifications Met		Each
10.3 fl. oz. Cartridge	40° to 120°	Red	4	UL 1479, UL 2079	0000000	000000
30 fl. oz. Cartridge	40° to 120°	Red	4	UL 1479, UL 2079	0000000	00000
Expanding Caulk
10.3 fl. oz. Cartridge	40° to 120°	Red	4	UL 1479, UL 2079	00000000	00000
30 fl. oz. Cartridge	40° to 120°	Red	4	UL 1479, UL 2079	00000000	00000
5 gal. Pail	40° to 120°	Red	4	UL 1479, UL 2079	00000000	000000

Watertight Fire-Stop Caulk

Cartridge

Pail

This caulk forms a long-lasting, flexible, watertight seal. Use it to close small openings in fire-resistant walls and floors. Dispense cartridges using a caulk gun.

Container	Application Temperature, ° F	Color	Fire Rating, hrs.	Specifications Met		Each
10.2 fl. oz. Cartridge	-20° to 120°	Gray	3	UL 1479	00000000	000000
28.7 fl. oz. Cartridge	40° to 110°	Red	3	UL 1479, UL 2079	00000000	00000
4.5 gal. Pail	-35° to 140°	Gray	4	UL 1479, UL 2079	00000000	000000

Fire-Stop Cement

Good for sealing large openings in fire-resistant walls and floors. Mix this lightweight powder with water to create a thick paste that's easy to apply.

Weight, lbs.	Color	Application Temperature, °F	Fire Rating, hrs.	Specifications Met		Each
45	Light Red	40° to 275°	4	UL 1479	00000000	0000000