BOSS 813 can be used on any commercial or residential construction where the code calls for a UL system for penetration of wires, cables and metal pipes through drywall, concrete or wood. (Please consult the UL directory for a full list of approved systems). BOSS 813 can also be used as a fireblock/ draftstop in non-fire rated construction. BOSS 813 prevents the spread of fire, smoke and toxic gasses from one compartment to another, while still maintaining the integrity of the Firewall. BOSS 813 has excellent insulation and acoustic properties, and is also paintable (after inspection).