The Types segment of Heat-resistant Insulating Bricks segmentation classifies products by material composition and performance tier. Silica bricks are valued for their low thermal conductivity and are prevalent in low‑to‑moderate temperature zones, contributing approximately 25 % of market volume. Fireclay bricks, characterized by moderate strength and resistance, capture around 20 % as they serve both industrial and commercial applications. Alumina bricks offer superior high‑temperature stability, accounting for 15 % of the market, especially in steel and petrochemical settings. Magnesite bricks, with excellent refractory properties, hold a 18 % share, favored in power generation and furnace linings. Finally, calcium silicate bricks, known for lightweight and rapid installation, represent about 22 % of demand, largely driven by residential and retrofit projects. By delineating these material subtypes, the taxonomy clarifies how each contributes to the aggregate market size, informing capacity planning and product‑mix strategies within the Heat-resistant Insulating Bricks sector.