PROMASPRAY®-F5 is a spray applied, single package factory controlled premix, based on vermiculite and Portland cement. PROMASPRAY®-F5 produces a monolithic coating able to withstand the thermal shocks experienced in a high intensity hydrocarbon fire. Concrete structures in particular, will be protected from explosive spalling when coated with PROMASPRAY®-F5. Although low in density, thus significantly reducing dead load, PROMASPRAY®-F5 is highly durable and will not crack or spall under mechanical impact. PROMASPRAY®-F5 is used for application on construction elements such as concrete or individual steel sections. It is also used extensively for the refurbishment or upgrading of existing tunnel structures.