BOSS® 813 can be used on any commercial or residential construction where the code calls for a UL system for penetration of cables, etc. 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).