Do rock wool sandwich panels provide adequate fire protection?

Rock wool sandwich panel is an inorganic material, with natural rock as the primary raw material, mixed with a small amount of blast furnace slag. Mineral fiber is made by high-temperature melting and centrifugal blowing, combined with a certain proportion of binder and additives through the pendulum pressing and cutting. It has good fireproof performance and is widely used in the construction field. The A1 grade rock wool sandwich panel is a non-combustible material, not easy to burn, will not release heat and toxic smoke, and can effectively cut off the flame spread in case of fire. 

In general, the fire resistance rating of rock wool sandwich panels is influenced by variations in density (i.e., bulk density) and the rock wool boards' thickness. 

Tseason's rock wool sandwich panels typically offer fire resistance ratings ranging from 1.5 to 3 hours. However, a 150mm thick sandwich panel can achieve a fire-resistance rating of up to 4 hours.