Description of Castable Refractory Cement by Rutland Products
Easily fix large masonry holes or cracks in your indoor or outdoor fireplace, stove, or other heating appliance. Build a solid fire pit floor or mold into custom firebrick shapes, the possibilities are endless. No heat cure required making your project much easier. 25 pounds will cast a 12" x 12" x 3" block. For interior or exterior use, rated to 2,200 Degrees F (1,200 Degrees C).