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About Selecting Thermal Insulation
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Ultra-High-Temperature Quartz Glass Filter Wool

Form unique shapes inside filters to sift corrosive liquids and gases at temperatures up to 1900°F. Because this wool is flexible, it’s good for use inside tubing and other lab equipment that doesn’t support flat filters. It won’t expand or contract when used with harsh materials, such as acids and acidic gases; however, hydrofluoric and phosphoric acids will eat away at the quartz material. Unlike natural quartz, this quartz is more than 99.95% pure, which means it won’t let in contaminants and is useful in applications where maintaining purity is crucial.
Fiber Diameter, microns | Weight | Maximum Temperature, °F | Reusable | For Use With | Filter Efficiency | Color | Each | |
99.95% Quartz | ||||||||
---|---|---|---|---|---|---|---|---|
4 | 0.35 oz. | 1900° | Yes | Acid Gases, Acids | Not Rated | White | 00000000 | 000000 |
4 | 0.5 lbs. | 1900° | Yes | Acid Gases, Acids | Not Rated | White | 00000000 | 000000 |
9 | 0.5 lbs. | 1900° | Yes | Acid Gases, Acids | Not Rated | White | 00000000 | 000000 |
9 | 1 lbs. | 1900° | Yes | Acid Gases, Acids | Not Rated | White | 00000000 | 000000 |
Rigid Mineral Wool Insulation Sheets



- Temperature Range: 0° to 1200° F
- Heat Flow Rate: See Table
- Density: 8 lbs./cu. ft.
- Color: Green
- Specifications Met: See Table
These durable sheets resist compression and are often used in oven and power-generating applications. To use outdoors, add metal jacketing.
Sheets with wire-mesh reinforcement withstand extreme shock and vibration.
Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK).
Flame-resistant sheets meet ASTM E84 0/0 for flame and smoke.
Thick. | Wd. | Lg., ft. | R Value | Heat Flow Rate | Flexibility | Performance Properties | Specifications Met | Each | |
Sheets | |||||||||
---|---|---|---|---|---|---|---|---|---|
1" | 24" | 4 | 4.3 | 0.23 Btu @ 75° F | Semi-Rigid | __ | ASTM E84 25/50 for Flame and Smoke | 0000000 | 000000 |
1 1/2" | 24" | 4 | 6.5 | 0.23 Btu @ 75° F | Semi-Rigid | __ | ASTM E84 25/50 for Flame and Smoke | 0000000 | 00000 |
2" | 24" | 4 | 8.7 | 0.23 Btu @ 75° F | Semi-Rigid | __ | ASTM E84 25/50 for Flame and Smoke | 0000000 | 00000 |
Sheets with Wire-Mesh Reinforcement on One Side | |||||||||
1" | 24" | 4 | 4.3 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
1 1/2" | 24" | 4 | 6.5 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
2" | 24" | 4 | 8.7 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
3" | 24" | 4 | 12.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
4" | 24" | 4 | 16.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
Sheets with Wire-Mesh Reinforcement on Two Sides | |||||||||
1" | 24" | 4 | 4.3 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
1 1/2" | 24" | 4 | 6.5 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
2" | 24" | 4 | 8.7 | 0.23 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke | 0000000 | 00000 |
3" | 24" | 4 | 12.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
4" | 24" | 4 | 16.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 000000 |
Sheets with Foil Facing | |||||||||
1" | 24" | 4 | 4.3 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
1 1/2" | 24" | 4 | 6.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
2" | 24" | 4 | 8.7 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
3" | 24" | 4 | 12.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
4" | 24" | 4 | 16.5 | 0.24 Btu @ 75° F | Semi-Rigid | Flame Resistant | ASTM E84 0/0 for Flame and Smoke, ASTM E84 25/50 for Flame and Smoke | 00000000 | 00000 |
Fiberglass Insulation Sheets

These lightweight, flexible fiberglass sheets are typically used to insulate equipment and appliances.
- Temperature Range: 0° to 350° F
- Heat Flow Rate: 0.26 Btu @ 75° F
- Density: 0.95 lbs./cu. ft.
- Color: Yellow
- Specifications Met: ASTM E84 25/50 for Flame and Smoke
Sheets with temperature range of 0° to 350° F can be layered to increase efficiency.
- Temperature Range: 0° to 1000° F
- Heat Flow Rate: 0.26 Btu @ 75° F
- Density: 2.4 lbs./cu. ft.
- Color: Gray
- Specifications Met: ASTM E84 25/50 for Flame and Smoke
Sheets with temperature range of 0° to 1000° F are suitable for use in ovens. To use outdoors, add metal jacketing (sold separately).
Thermally Stable Composite Paper Insulation Sheets

- Max. Temperature: 1100° F
- Heat Flow Rate: 0.22 Btu @ 75° F
- Density: 8.7 lbs./cu. ft.
- Color: White
- Specifications Met: UL 94 V-0
Made of flexible composite paper, these sheets won't shrink or lose shape in the high temperatures of air furnaces and hot water tanks.
Fiberglass Building Insulation Sheets and Strips
Also known as batts, these fiberglass sheets and strips are used to insulate walls, ceilings, and floors.
Sheets/strips with moisture barrier prevent condensation from forming. Use electrical tape to secure the ends.
Sheets/strips with kraft paper facing can be layered to increase thermal efficiency. Seal with reinforced insulation tape (sold separately).

Flexible Fiberglass Duct Insulation Sheets
Wrap rectangular and round ductwork with this flexible insulation. Seal with reinforced HVAC tape (not included).
Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK).
Sheets with vinyl facing are tear resistant.

- Temperature Range: 0° to 250° F
- Heat Flow Rate: 0.26 Btu @ 75° F
- Color: Brown
- Facing Color: Silver
- Specifications Met: ASTM E84 25/50 for Flame and Smoke
10 ft. × 48" | 50 ft. × 48" | 75 ft. × 48" | 100 ft. × 48" | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Thick. | R Value | Flexibility | Each | Each | Each | Each | ||||
1 1/2" | 4.5 | Flexible | 0000000 | 000000 | 000000 | 00 | 000000 | 00 | 0000000 | 0000000 |
1 1/2" | 4.8 | Flexible | 0000000 | 00000 | 000000 | 00 | 0000000 | 0000000 | 000000 | 00 |
1 1/2" | 5 | Flexible | 000000 | 00000 | 000000 | 00 | 000000 | 00 | 000000 | 000000 |
2" | 5.6 | Flexible | 0000000 | 00000 | 000000 | 00 | 0000000 | 000000 | 000000 | 00 |
2" | 6 | Flexible | 0000000 | 00000 | 000000 | 00 | 0000000 | 000000 | 000000 | 00 |
2" | 6.4 | Flexible | 0000000 | 000000 | 0000000 | 0000000 | 000000 | 00 | 000000 | 00 |
2 3/16" | 6 | Flexible | 0000000 | 00000 | 000000 | 00 | 0000000 | 000000 | 000000 | 00 |
3" | 8.4 | Flexible | 0000000 | 00000 | 0000000 | 000000 | 000000 | 00 | 000000 | 00 |
Reinforced HVAC Tape | 00000000 | Each | 000000 |
Rigid Fiberglass Duct Insulation Sheets


- Temperature Range: 0° to 450° F
- Facing Temperature Range: 0° to 150° F
- Heat Flow Rate: 0.23 Btu @ 75° F
- Density: See table
- Color: Yellow
- Facing Color:
Foil Facing: Silver;
Kraft Paper Facing: White - Specifications Met: ASTM E84 25/50 for Flame and Smoke
Insulate rectangular ductwork.
Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK). Seal with reinforced HVAC tape (sold separately).
To seal sheets with kraft paper facing, use reinforced insulation tape (sold separately).
Sheets with Foil Facing | Sheets with Kraft Paper Facing | |||||||
---|---|---|---|---|---|---|---|---|
Thick. | Wd. | Lg., ft. | R Value | Flexibility | Each | Each | ||
3 lbs./cu. ft. Density | ||||||||
1" | 24" | 4 | 4.3 | Rigid | 000000 | 000000 | 000000 | 000000 |
1 1/2" | 24" | 4 | 6.5 | Rigid | 000000 | 00000 | 000000 | 00000 |
2" | 24" | 4 | 8.7 | Rigid | 000000 | 00000 | 000000 | 00000 |
6 lbs./cu. ft. Density | ||||||||
1" | 24" | 4 | 4.3 | Rigid | 000000 | 00000 | 000000 | 00000 |
1 1/2" | 24" | 4 | 6.5 | Rigid | 000000 | 00000 | 000000 | 00000 |
2" | 24" | 4 | 8.7 | Rigid | 000000 | 00000 | 000000 | 00000 |
Flame-Resistant Flexible Synthetic Fiber Duct Insulation Sheets

- Max. Temperature: 1830° F
- Heat Flow Rate: 1.93 Btu @ 1500° F
- Density: 6 lbs./cu. ft.
- Color: White
- Facing Color: Silver
- Specifications Met: ASTM E84 0/0 for Flame and Smoke
Also known as fire wrap, these flame-resistant sheets meet ASTM E84 0/0 for flame and smoke and create a fire barrier around rectangular and round ductwork. They are often used to wrap kitchen grease exhaust ducts and air ducts. Seal with reinforced HVAC tape (sold separately).
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).
For technical drawings and 3-D models, click on a part number.

- 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

- 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