Metacaulk Putty is a moldable non-curing one component fire-rated material
for through-penetration fire stop systems. Metacaulk Putty will intumesce
when heated, forming an insulating cha. Metacaulk Putty is applied by hand.
Mixing is never required and no special skills are necessary for
installation. Metacaulk Putty systems are rated for up to 3 hours in
accordance with theASTM E 814, UL 1479 and ULC/CAN4-S115-M test standards