Pipe Fillers | McMaster-Carr

PTFE provides a slippery surface that keeps threads from binding. These sealants never fully harden, remaining pliable enough to self-heal and stop leaks before they start, so they’re often used in high-vibration applications that could cause standard thread sealants to fail. Since they have low locking strength, these sealants can be adjusted without tools.

VOC (volatile organic compounds) regulations restrict sales of sealants that cannot be sold to the listed jurisdictions/areas.

Container		Max. Pressure, psi
Size	Type	For Fluids	For Gases	Temp. Range, °F	For Max. Thread Dia.	Consistency	Specifications Met	Color	Cannot Be Sold To		Each
Low Locking Strength
Sealants
0.125 oz.	Tube	10,000	3,000	-100° to 600°	2"	Paste	CSA Certified, CSA-US Certified, UL Classified	Blue	CO, CT, DC, DE, IL, IN, MA, MD, ME, MI, NH, NJ, Northern VA, NY, OH, PA, RI, UT	00000000	00000
16 oz.	Brush-Top Can	10,000	3,000	-100° to 600°	2"	Paste	CSA Certified, CSA-US Certified, UL Classified	Blue	CO, CT, DC, DE, IL, IN, MA, MD, ME, MI, NH, NJ, Northern VA, NY, OH, PA, RI, UT	00000000	00000
32 oz.	Brush-Top Can	10,000	3,000	-100° to 600°	2"	Paste	CSA Certified, CSA-US Certified, UL Classified	Blue	__	00000000	00000
1 gal.	Can	10,000	3,000	-100° to 600°	2"	Paste	CSA Certified, CSA-US Certified, UL Classified	Blue	__	00000000	000000

Ultra-Thin Aerogel Pipe Insulation

Lightweight and super thin, these fiber-reinforced silica aerogel sheets and strips flex into tight spaces other insulation can't. Use on process piping and in power-generating applications. Insulation can be layered, laminated, or wrapped in foil.

Flame-resistant insulation meets ASTM E84 0/0 for flame and smoke.

Sheets/Strips

32° to 390° Temperature Range

Temperature Range: 32° to 390° F
Heat Flow Rate: 0.11 Btu @ 75° F
Density: 10.7 lbs./cu. ft.
Color: Black

Thick.	Wd.	Lg.	R Value	Reinforcement Material	Flexibility		Each
5/64"	12"	26"	0.8	Fiberglass Fiber	Flexible	000000	000000

Flame-Resistant Sheets/Strips

32° to 1200° Temperature Range

Temperature Range: 32° to 1200° F
Heat Flow Rate: 0.16 Btu @ 75° F
Density: 12.5 lbs./cu. ft.
Color: Maroon
Specifications Met: ASTM E84 0/0 for Flame and Smoke

13/32" Thick.
Wd.	Lg.	R Value	Reinforcement Material	Flexibility		Each
1 1/2"	58"	2.46	Fiberglass Fiber	Flexible	0000000	000000
58"	60"	2.46	Fiberglass Fiber	Flexible	0000000	000000

Fiberglass Pipe Insulation

This common insulation material is typically used on hot and cold water lines and in process piping. To use outdoors, add metal jacketing.

Sheets/strips with foil facing reflect heat away from pipe. The foil facing is also known as FSK. Seal with reinforced HVAC tape (sold separately).

Sheets/strips with kraft paper facing have an all-service jacket (ASJ) made of kraft paper. Seal with reinforced insulation tape (sold separately).

Sheets/Strips with Foil Facing

Sheet/Strip with Foil Facing

Temperature Range: -60° to 450° F
Facing Temperature Range: -40° to 150° F
Heat Flow Rate: 0.27 Btu @ 75° F
Density: 3 lbs./cu. ft.
Color: Yellow
Facing Color: Silver

Thick.	Wd.	Lg., ft.	R Value	Flexibility		Each
1"	36"	20	3.7	Flexible	0000000	0000000
1 1/2"	36"	20	5.6	Flexible	0000000	000000
2"	36"	20	7.4	Flexible	0000000	000000

Reinforced HVAC Tape (3" × 30 ft.)

00000000

Each

00000

Sheets/Strips with Kraft Paper Facing

Sheet/Strip with Kraft Paper Facing

Temperature Range: -60° to 450° F
Facing Temperature Range: -40° to 150° F
Heat Flow Rate: 0.27 Btu @ 75° F
Density: 3 lbs./cu. ft.
Color: Yellow
Facing Color: White

Thick.	Wd.	Lg., ft.	R Value	Flexibility		Each
1"	36"	20	3.7	Flexible	0000000	0000000
1 1/2"	36"	20	5.6	Flexible	0000000	000000
2"	36"	20	7.4	Flexible	0000000	000000

Reinforced Insulation Tape (3" × 30 ft.)

00000000

Each

000000

High-Strength Basalt Pipe Insulation

Max. Temperature: 1200° F
Heat Flow Rate: 2.44 Btu @ 900° F
Density: 1.75 lbs./cu. ft.
Color: Brown

Superior in strength and durability, these thin strips insulate as well as protect personnel from accidental contact with hot pipes. Use for exhaust, hot water, and process pipes.

Thick.	Wd.	R Value	Flexibility	Lengths, ft.		Per Ft.
3/64"	1"	0.03	Flexible	15, 25, 50, 100	0000000	00000
3/64"	2"	0.03	Flexible	15, 25, 50, 100	0000000	0000

Economical Flexible Polyethylene Foam Pipe Insulation

Less flexible than rubber foam, this insulation restricts absorption of water, air, and gas. It is typically used in plumbing applications. Seal with contact adhesive (sold separately). To use outdoors, coat in acrylic paint.

Sheets/Strips

Sheet/Strip

Temperature Range: -330° to 210° F
Heat Flow Rate: 0.270 Btu @ 75° F
Density: 1.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke

Thick.	Wd.	Lg., ft.	R Value	Flexibility		Each
1/4"	36"	4	1	Flexible	00000000	000000
3/8"	36"	4	1.5	Flexible	00000000	00000
1/2"	36"	4	2	Flexible	00000000	00000
3/4"	36"	4	3	Flexible	00000000	00000
1"	36"	4	4	Flexible	00000000	00000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Foam, Masonry, Metal, Plastic, Rubber	00000000	Each	00000

High-Temperature Ceramic Fiber Pipe Insulation

Shield against extreme heat with these flexible ceramic strips. They are often used to insulate hose, cables, and process piping.

Alumina oxide ceramic fiber has the lowest heat-flow rate of all the ceramic fiber materials.

Alkaline earth silicate ceramic fiber, also called AES, has a foil facing to reflect radiant heat.

Insulation with adhesive backing allows you to install without having to hold in place. Secure with band clamps or other parts of the assembly once in position. Apply while cool. Adhesive will start to wear off around 400° F, but this does not affect the insulation’s temperature rating.

Alumina Oxide Ceramic Fiber

Temperature Range: See table
Heat Flow Rate: 0.48 Btu @ 800° F
Density: 12 lbs./cu. ft.
Color: White

1/32" Thick.
Wd.	Lg., ft.	Temp. Range, °F	R Value	Backing Type	Flexibility		Each
1"	50	-50° to 2300°	0.02	Plain	Flexible	00000000	000000
2"	50	-50° to 2300°	0.02	Plain	Flexible	00000000	00000
3"	50	-50° to 2300°	0.02	Plain	Flexible	00000000	00000
1/16" Thick.
1"	50	-50° to 2300°	0.04	Plain	Flexible	00000000	00000
2"	50	-50° to 2300°	0.04	Plain	Flexible	00000000	00000
3"	50	-50° to 2300°	0.04	Plain	Flexible	00000000	00000
1/8" Thick.
1"	25	-50° to 2300°	0.2	Plain	Flexible	00000000	00000
1"	50	-50° to 2300°	0.2	Adhesive	Flexible	00000000	000000
1 1/2"	50	-50° to 2300°	0.2	Adhesive	Flexible	00000000	000000
2"	25	-50° to 2300°	0.2	Plain	Flexible	00000000	00000
2"	50	-50° to 2300°	0.2	Adhesive	Flexible	00000000	000000
3"	25	-50° to 2300°	0.2	Plain	Flexible	00000000	00000
3"	50	-50° to 2300°	0.2	Adhesive	Flexible	00000000	000000
1/4" Thick.
1"	25	-50° to 2300°	0.5	Plain	Flexible	00000000	000000
1"	62 1/2	-50° to 2300°	0.5	Adhesive	Flexible	00000000	000000
1 1/2"	62 1/2	-50° to 2300°	0.5	Adhesive	Flexible	00000000	000000
2"	25	-50° to 2300°	0.5	Plain	Flexible	00000000	000000
2"	62 1/2	-50° to 2300°	0.5	Adhesive	Flexible	00000000	000000
3"	25	-50° to 2300°	0.5	Plain	Flexible	00000000	000000
3"	62 1/2	-50° to 2300°	0.5	Adhesive	Flexible	00000000	00000000

Alkaline Earth Silicate Ceramic Fiber with Aluminum Foil Facing

Alkaline Earth Silicate Ceramic Fiber

Max. Temperature: 2100° F
Heat Flow Rate: 0.73 Btu @ 800° F
Density: 8 lbs./cu. ft.
Color: White
Facing Color: Silver

1/4" Thick.
Wd.	Lg., ft.	R Value	Backing Type	Flexibility		Each
1"	12	0.3	Plain	Flexible	0000000	00000
2"	12	0.3	Plain	Flexible	0000000	00000
3"	12	0.3	Plain	Flexible	0000000	00000
6"	12	0.3	Plain	Flexible	0000000	00000
12"	12	0.3	Plain	Flexible	0000000	00000
1/2" Thick.
1"	12	0.7	Plain	Flexible	0000000	00000
2"	12	0.7	Plain	Flexible	0000000	00000
3"	12	0.7	Plain	Flexible	0000000	00000
6"	12	0.7	Plain	Flexible	0000000	00000
12"	12	0.7	Plain	Flexible	0000000	00000
1" Thick.
1"	12	1	Plain	Flexible	0000000	00000
2"	12	1	Plain	Flexible	0000000	00000
3"	12	1	Plain	Flexible	0000000	00000
6"	12	1	Plain	Flexible	0000000	00000
12"	12	1	Plain	Flexible	0000000	00000

Calcium Aluminum Silicate Ceramic Fiber

Temperature Range: See table
Heat Flow Rate: 0.82 Btu @ 800° F
Density: 35 lbs./cu. ft.
Color: White

1/32" Thick.
Wd.	Lg., ft.	Temp. Range, °F	R Value	Backing Type	Flexibility		Each
1"	25	-40° to 1500°	0	Adhesive	Flexible	000000	000000
2"	25	-40° to 1500°	0	Adhesive	Flexible	000000	00000
3"	25	-40° to 1500°	0	Adhesive	Flexible	000000	00000
1/16" Thick.
1"	25	-40° to 1500°	0.1	Adhesive	Flexible	000000	00000
2"	25	-40° to 1500°	0.1	Adhesive	Flexible	000000	00000
3"	25	-40° to 1500°	0.1	Adhesive	Flexible	000000	00000
1/8" Thick.
1"	25	-40° to 1500°	0.2	Adhesive	Flexible	000000	00000
2"	25	-40° to 1500°	0.2	Adhesive	Flexible	000000	00000
3"	25	-40° to 1500°	0.2	Adhesive	Flexible	000000	00000
1/4" Thick.
1"	25	-40° to 1500°	0.5	Adhesive	Flexible	0000000	000000
2"	25	-40° to 1500°	0.5	Adhesive	Flexible	0000000	000000
3"	25	-40° to 1500°	0.5	Adhesive	Flexible	0000000	000000

Flexible Rubber Foam Pipe Insulation

Soft and easy to install, this insulation restricts absorption of water, air, and gas. It is often used on cold and hot water lines and refrigeration lines. Seal with contact adhesive (sold separately). To use outdoors, coat in acrylic paint.

Sheets/Strips

Sheet/Strip

Temperature Range:
Plain Backing: -295° to 220° F
Adhesive Backing: 20° to 180° F
Heat Flow Rate: 0.25 Btu @ 75° F
Density: 4.5 lbs./cu. ft.
Color: Black
Specifications Met: ASTM E84 25/50 for Flame and Smoke

					Plain Backing		Adhesive Backing
Thick.	Wd.	Lg., ft.	R Value	Flexibility		Each		Each
1/8"	2"	30	0.5	Flexible	000000	00	0000000	000000
1/4"	36"	4	1	Flexible	000000	000000	0000000	00000
3/8"	36"	4	1.5	Flexible	000000	00000	0000000	00000
1/2"	36"	4	2	Flexible	000000	00000	0000000	00000
3/4"	36"	4	3	Flexible	000000	00000	0000000	00000
1"	36"	4	4	Flexible	000000	00000	0000000	00000
1 1/2"	36"	4	6	Flexible	000000	000000	0000000	000000

White Acrylic Coating (1-qt. Can)	00000000	Each	000000
Contact Adhesive (16-oz. Brush-Top Can)	00000000	Each	00000

Ultra-Thin Low-Temperature Aerogel Pipe Insulation

Temperature Range: -290° to 390° F
Heat Flow Rate: 0.11 Btu @ 75° F

Able to withstand temperatures as low as -290° F, these super-thin, lightweight sheets are made of fiber-reinforced silica aerogel that can flex into tight spaces other insulation can't. Use in process piping and power-generating applications. Insulation can be layered, laminated, or wrapped in foil.

Thick.	Wd.	Lg.	R Value	Reinforcement Material	Flexibility		Each
3/16"	12"	26"	1.9	Fiberglass Fiber	Flexible	000000	000000

About Sealant Flexibility

About Selecting Thermal Insulation

About Structural Adhesives

About Paint and Protective Coatings