Skip to content
FREE SHIPPING ON ALL CONTINENTAL US ORDERS OVER $100
FREE SHIPPING ON ALL CONTINENTAL US ORDERS OVER $100
Insul Cast Insulating Castable Refractory Cement for Ovens

Insulating Castable Refractory Dry Mix for Ovens - 50lb bag

by Heat Stop
$164.98
SKU IC-50B

Insul-Cast is the ideal insulating castable refractory solution for ovens and behind other high temp fireboxes or firebrick applications. This product typically goes behind the firebox to provide an insulating effect so that heat can be better refracted back into the heating area and contained.

The primary applications

  • Insulator on top of a pizza or bread oven dome
  • Behind a firebox firebrick wall
  • Under the sub hearth or firebrick for an oven

A single fifty-pound bag of Insul-Cast will cover ~6 square feet applied at 2 inches thick. Recommended application is 2-3 inches in thickness cast or troweled into place.

FREE SHIPPING

Looking for a quote for your project? (800) 567-5358

Project Quote Form Here>

It is sold in 50lb bags.

INSUL CAST PRODUCT SPECS

Details: 

  • Made in the USA 

INSULATING A BRICK OVEN DOME

SHIPPING TIME

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

Note by default all Insul Cast & 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.  

SHIPPING MAP

REFRACTORY MORTAR PRODUCTS

INSULATING AN OVEN WITH INSUL CAST

Frequently Asked Questions

How thick does Insul Cast need to be applied?

Insul Cast is typically cast 2” thick under the hearth, behind the firebox or over the oven dome. It may be cast thicker. 

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.

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. 

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

TRYING TO MEET A SPEC?

WE CAN HELP!

QUESTIONS?

Call (800) 567-5358
or Email
Monday - Friday 8AM - 5PM PST

SHIPPING NATIONWIDE

*Contiguous 48 States Only