Castable Loucast 3000 50lb Bag



LOUCAST 3000 Degree Dense Castable Refractory Mortar

Cast Your Own Hard Fire Brick

Loucast is a dry material offered here in 50-pound bags. You add water, mix and pour into your form to create a dense high-temperature firebrick. The finished product is rated at 3000F. This material is often used in furnaces and boilers. It is often used to create forges and for the floor of pizza and bread ovens. For wood kiln building this is a great product as it allows you to cast any shape you need.

When casting larger monoliths it is recommended to add stainless steel refractory needles or other stainless wire reinforcement.

LOUCAST 3000 Degree Castable Refractory is a dense castable refractory mortar rated for 3000˚F It is low iron content, with high purity. This refractory mortar is designed to successfully withstand high sulfur fuel, reducing atmospheres, carbon deposition, erosion, and abrasion. This castable refractory cement can be used for gunning, casting, troweling, or extruding.

131 Pounds dry yields 1 cubic foot.
50-pound bag yields approximately 0.38 cubic feet
Mix Rate: 4.8 quarts / 100 Pounds


The installation procedures for castables are relatively simple if the fundamentals are understood. With proper supervision, relatively unskilled labor can be used and still achieve excellent structural and thermal properties in the finished refractory lining.


Castable refractories or refractory concrete, as they are sometimes called, can be installed by one of several methods:

  1. pouring into forms
  2. tamping into place
  3. pneumatic gunning.

When the installation is done by pouring or tamping, the mixing is done in a concrete mixer or preferably in a paddle-type mixer. Mixing can be done in a mortar box by hand but this is not recommended. Only good clear water, suitable for drinking, should be used because there could be mineral or chemical contaminants in process water or dirty water, which could completely destroy the effect of the bonding agent in the refractory. The mixer must be free of dirt and set up concrete from previous mixes because if this material were to flake off into the new castable, it could have a radical effect on the setting characteristics of the new material.

The time of mixing, after the addition of water, should be sufficient to ensure that all of the dry material is thoroughly wetted but in no case should exceed five minutes.