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Castable Refractory Cement Heat Cast 40

$147.55
SKU HS-40

Heat Cast 40 is the ideal castable refractory cement solution for high-heat applications. This product can be molded into the custom shape needed for boilers, furnaces, woodstoves, fireplace hearths, forges, and other high-temperature applications.
The refractory cement mortar is poured into a form to create your bricks.

The 40-pound bag of dry mix will cover approximately 2 square feet at two inches thick. Depending on the situation, it can be cast or toweled in place. Heat Cast 40 should be cast no thinner than 1.5" thick to maintain integrity. 

For estimating purposes, approximately 20 lbs. will cover one square ft., two inches thick.

This product meets ASTM C-401 Class B. It's also non-water soluble while in service.
As a castable refractory product, it handles extremely high temperatures in excess of 2,000 degrees.

Typical applications for Heat Cast 40: Pizza ovens, Blacksmithing, Forges, Crematoriums 


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Heat Cast 40 lb. Bags sold individually

PRODUCT SPECS

Details: 

  • Made in the USA 

HEAT CAST REFRACTORY CEMENT

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Call (800) 567-5358 for pricing and logistics questions 

Note by default all Heat Cast orders ship from our centrally located Ohio warehouse where a full stock of Refractory Mortar and Castable products are maintained.

Most orders ship out 1-2 business days following the order depending on stock levels. Delivery times shown on the shipping map are typical, though not guaranteed.  

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Frequently Asked Questions

Once Heat Stop has been Installed, how long do I need to wait before applying heat? 

It's best to wait one day after the masonry is installed in a chimney or fireplace for a firebrick or clay flue lining before applying heat.

What ASTM specs and building codes are in place for fireplace and chimney construction?

Building codes require refractory products that meet ASTM C-199 (medium duty) for fireplace and chimney construction. All Heat Stop products (including the castable products Insul Stick, Insul Cast and Heat Cast 40) meet or exceed this ASTM C-199 (medium duty) requirement. Firebrick must meet the ASTM C-27 requirement, and clay flue lining must meet the ASTM C-315 and ASTM C-1283 requirements. ASTM C-105 is a discontinued specification for fireclay and should NOT be used in fireplace and chimney construction. Fireclay mixes with regular mortar do not meet current building codes.

What is the ideal thickness for joints when using Heat Cast Refractory Castable Cement?

Heat Cast 40 is designed for casting shapes or is used anywhere instead of firebrick. It can also be used as a hearth in a heat chamber (e.g., bake ovens, fire pits, fire boxes). You will need 20 lbs. per square foot when applied 2” thick. There is 40 lb.in each bag. It is recommended to not cast thinner than 1.5 inches thick.

Can I color Heat Stop and Heat Cast products?

Heat Stop 50 and Heat Cast 40 can be colored to match a desired mortar color. Its recommended to follow the color manufacturer's instructions to ensure a best results. Prism and Solomon are two known color agent companies. 

What is Refractory Cement. men installing refractory mortar by hand

Men applying Refractory Cement by hand

What is Refractory Cement?

Refractory cement is a specialized type of material that is used in the construction of linings for furnaces, ovens, forges, kilns, crematoriums, and other high-temperature equipment. It is made from a mixture of refractory materials, such as alumina, silicon carbide, and fireclay, that are capable of withstanding extremely high temperatures.

One of the main characteristics of refractory cement is its ability to resist thermal shock, which is the sudden change in temperature that can occur when equipment is shut off or when the temperature inside the equipment changes rapidly. This makes it an ideal choice for use in high-temperature environments, as it can help to prevent damage to the equipment and prolong its lifespan.

Refractory cement is available in a dry mix form that can be mixed with water to form a paste, which can then be applied to the surface to be lined. It is generally applied using a trowel or other tool, and is allowed to dry before the equipment is put into use.

Where is Refractory Cement Commonly Used?

Some of the main uses of refractory cement include:

  • Lining the walls and floor of furnaces and kilns to protect them from the effects of heat and wear
  • Building fireplaces, wood stoves, and other heating appliances
  • Constructing ovens and boilers that are subjected to high levels of heat
  • Repairing or rebuilding linings in high-temperature equipment

It is important to follow the manufacturer's instructions carefully when working with refractory cement and to wear protective gear, such as gloves and a mask, when handling the material.

Overall, refractory cement is a valuable material that is essential for the construction of high-temperature equipment and appliances. Its ability to withstand extreme temperatures and harsh conditions makes it a durable and long-lasting choice that is used in a wide range of industries.

Are Refractory Cement and Fire Cement the Same Thing?

Fire cement and refractory cement are similar in that they are both used to construct linings for high-temperature equipment and appliances, such as furnaces, kilns, and fireplaces. Both types of cement are made from a mixture of refractory materials that are capable of withstanding extreme temperatures and harsh conditions.

However, there are some differences between fire cement and refractory cement. Fire cement is a type of cement that is specifically designed to be used in the construction of fireplaces, wood stoves, and other heating appliances. It is generally formulated to have a high resistance to heat and is used to seal joints, fill gaps, and repair cracks in these types of equipment.

Difference Between Refractory Cement and Fire Cement Pizza Oven

Refractory Cement VS. Fire Cement

On the other hand, refractory cement is a more general product/term that refers to any type of cement that is used in the construction of linings for high-temperature equipment and appliances. It is typically used in a wider range of industries, including metallurgy, ceramics, and glass production, and is formulated to have a high resistance to thermal shock, chemical attack, and mechanical wear.

In summary, while fire cement and refractory cement are similar in that they are both used in high-temperature applications, fire cement is specifically designed for use in fireplaces and wood stoves, while refractory cement is a more product that can be used in a wider range of high-temperature applications.

cracking of refractory cement on chimney

Brick chimney refractory cement cracking

Does Refractory Cement Crack?

Like any material, refractory cement can crack under certain circumstances. Some of the factors that can contribute to the cracking of refractory cement include:

  • Poor application or curing: If the refractory cement is not applied or cured correctly, it can be more prone to cracking. This can be caused by applying the cement too thickly, not allowing it to dry properly, or not using the correct mix ratio.
  • Mechanical stress: Refractory cement can also crack due to mechanical stress, such as when it is subjected to heavy loads or impacts.
  • Chemical attack: If the refractory cement is exposed to chemicals that it is not resistant to, it can become weakened and more prone to cracking.
  • Thermal expansion and contraction: When subjected to extreme temperatures, refractory cement can expand and contract, which can lead to cracking if the cement is not able to accommodate these changes.

In general, refractory cement is a durable and long-lasting material, but it is not immune to cracking. It is important to follow the manufacturer's instructions carefully when working with refractory cement and to take steps to prevent cracking, such as allowing it to dry properly and avoiding mechanical stress.

Refractory Cement: What it Is, Plus 5 Things You NEED to Know

Refractory Cement: What it Is, Plus 5 Things You NEED to Know

Jan 02, 2023 Jake Goodwin

Refractory Cement is a heat-resistant material designed to line fireboxes and withstand very hot environments (2,000-3,000*F) such as firebox linings, forges, kilns, ovens, incinerators, crematoriums, and other high temperature equipment. Refractory cement is commonly combined with other products like firebrick

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