Vermiculite fire spray can be used to upgrade the fire resistance level of slabs and walls while also resulting in a nice textured finish. This is the fastest and most cost effective way to upgrade the FRL of a slab or firewall. Vermiculite fireproofing is known to be a dirty job, that’s why we always use trained applicators and masking protection when necessary to produce a nice finish without disrupting the surrounding services. A cement-based product can be used on exposed walls for external applications.