Which of the following is considered a fireproofing material type?

Mineral fiber is recognized as a fireproofing material type due to its excellent thermal insulation properties and ability to withstand high temperatures. This material is often used in building construction to provide fire resistance to structural components, thereby enhancing the overall fire safety of a building. Mineral fibers, such as fiberglass or rock wool, do not burn and can help slow down the spread of fire, protecting both the structure and its occupants.

In contrast, polyurethane foam is primarily used for insulation and not designed to resist high temperatures or flames. Steel coatings may offer protection against corrosion or wear but are not classified as fireproofing materials in the same sense that mineral fiber is. Wood composites generally have lower fire resistance and can ignite easily, making them unsuitable for fireproofing applications. Therefore, mineral fiber stands out as the appropriate choice for fireproofing applications.