Refractory Insulation | McMaster-Carr

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245 Products

About Selecting Thermal Insulation

Ceramic Fiber Insulation Sheets for Furnaces

The most common of our flexible high-temperature sheets, these are used to insulate furnaces.

Abrasion-Resistant Rigid Calcium
Silicate Insulation Sheets

Made of high-strength calcium silicate, these durable sheets withstand high temperatures and are often used in power-generating applications.

Thermal-Shock-Resistant Ceramic
Fiber Insulation Sheets for Furnaces

Designed for fluctuating, high-temperature applications, these semi-rigid sheets are typically used in furnaces and fire protection applications. They experience very little shrinkage at high temperatures, but the brittle material can be somewhat difficult to work with.

Rigid Silica Ultra-Insulation Sheets for Furnaces

Typically used in ovens and furnaces, these are the most efficient of our rigid high-temperature insulation sheets. Please note that they require special care when installing since the crumbly material is difficult to work with and will crack easily. Sheets lose strength over time and are intended to be installed behind another facing or insulation material.

Acid-Resistant Silica Insulation Sheets for Furnaces

Commonly used in furnaces and engine compartments, these flexible silica fiber sheets resist corrosive acids.

Ultra-Thin Rigid Millboard
Insulation Sheets for Furnaces

Thinner than most rigid insulation for furnaces and other high-heat applications, these millboard sheets are also used for gasket fabrication.

Moldable Ceramic Insulation Sheets for Furnaces

Wet these rigid sheets and they become formable. They can be molded multiple times until exposed to heat, which causes them to become rigid again.

Firebrick Insulation

Often used in furnaces, these firebricks have been machined for a snug fit to minimize heat loss.

Firebrick Bonding Mortar

Lay, coat, and bond firebricks. Apply this mortar with a trowel.

Firebrick Repair Coatings

Renew heat resistance and performance of worn firebrick. Apply coating with a brush or spray on for a crack-free seal.

Extreme-Temperature Cement

Set and repair cast iron and steel furnaces, heaters, stoves, and boilers with this ready-to-use cement. It experiences minimal shrinkage for a permanent smokeproof and gasproof joint. Apply with a trowel or a spatula.

Abrasion-Resistant Firebrick Insulation

Stronger than standard firebricks but with lower insulation capabilities, these withstand heavy abrasion on the floors and sides of furnaces. Also known as hard firebricks.

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.

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.

Ultra-Thin Low-Temperature Aerogel Pipe Insulation

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.

Ultra-High-Temperature Ceramic

Thermally Shock-Resistant Mullite Ceramic Sheets

Often used as kiln shelves and refractory bricks, you can repeatedly move these mullite ceramic sheets between very hot and cold environments without deforming or cracking.

Thermally Shock-Resistant Mullite Ceramic Tubes

Protectively sheath materials, such as thermocouples, that move between hot and cold environments. Similar to nonporous alumina tubes, air and gas cannot pass through these mullite tubes.

Thermally Shock-Resistant Mullite Ceramic Powder

More resistant to deforming due to high and fluctuating temperatures than most other ceramics, add this mullite powder to a slurry to create crucibles, ladles, and other parts by casting them.

Thermally Shock-Resistant Mullite Ceramic Rods

Used in prototypes, insulators, and machine tooling, these mullite ceramic rods won’t deform or crack when exposed to extreme temperature changes, high heat, or stress.

Nonporous Alumina Ceramic Powder

Alumina ceramics withstand higher temperatures than any other ceramic and are highly chemical resistant. Powder is often used in casting processes. Add it to slurries to create custom parts and tools such as crucibles, cutting tools, and laboratory ware.

Extra Thermally Shock-Resistant
Single-Closed-End SiAlON Ceramic Tubes

Often used as a protective shield in thermocouples and other conditions with drastic climate changes, these SiAlON ceramic tubes won't deform, expand, or crack when repeatedly exposed to large temperature changes.

High-Purity Acid-Resistant
Green Silicon Carbide Powder

Highly pure, this green silicon carbide powder is consistent between batches and bonds better than less pure powders, yielding less cracking and wear in finished products.