Fire block and firestop are two different concepts and use different materials.
Fire blocking insulation.
F ire blocking aims to prevent or at least slow the vertical movement of flames smoke and gases by sealing off concealed spaces like stud cavities and soffits.
When piping conduit or similar obstructions are encountered the insulation shall be packed tightly around the obstruction.
Owens corning 15 in.
Thermafiber fire and sound guard mineral wool insulation batt 24 bags model sg 25 p3 15 47 221 view the owens corning thermafiber mineral wool insulation.
Unfaced fiberglass batt insulation used as fireblocking shall fill the entire cross section of the wall cavity to a minimum height of 16 inches 406 mm measured vertically.
Insulation materials fire block insulation and foam fiberglass insulation secured tightly batts or blankets insulation cellulose insulation at approved thickness spray foams that are approved for fire blocking.