The phrase identifies a specific type of granular material commonly used in outdoor heating appliances, specifically offered by a large home improvement retailer. This material, often composed of silica or other heat-resistant minerals, serves as a protective layer within the fire pit structure. For example, when constructing or maintaining an outdoor fire feature, individuals frequently source this material from national chains such as The Home Depot.
Utilizing a designated substrate within a fire pit is essential for several reasons. It helps to distribute heat evenly, preventing concentrated hot spots that can damage the pit’s metal or stone structure. Furthermore, the substrate acts as a barrier, protecting the fire pit’s base from direct contact with extreme temperatures, prolonging its lifespan. The accessibility of this material through established retail channels makes it a convenient option for consumers seeking to safely and effectively operate their outdoor fire features.