Introducing Perlite - Refractory / Castable Blending Grade from Perlite Canada Inc., a versatile material perfect for farriers, blacksmiths, and DIY enthusiasts. This small casting size perlite is designed to withstand temperatures up to 2500°F, making it an essential component for refractory and cement blends.Perlite is a lightweight, expanded volcanic rock that retains porosity, enhancing thermal resistance and strength in castings. Its small grain size is optimal for mixing with concrete, plaster, gypsum, and refractories, offering improved R-value and bulk without compromising strength.Whether you're constructing a pizza oven, creating backyard rocket stoves, or working on other high-temperature projects, this perlite provides excellent insulation and durability. Available in large 4 cubic ft bags for in-store purchase, it is a cost-effective solution for your refractory needs.Key Features: Withstands up to 2500°F Small grain size for superior blending Enhances thermal resistance and strength Ideal for refractory and cement mixtures Available for in-store pickup