Metacaulk Putty Metacaulk® Putty is a mold-able non-curing one compo-nent fire-rated material for through-penetration fire stop systems. Metacaulk Putty will intumesce when heated, form-ing an insulating char. Technical Data Sheet : English Category: Metacaulk Related products MetacaulkMetacaulk Cast-In-Place Read more MetacaulkMetacaulk Industrial Cable Coating Read more MetacaulkMetacaulk BlazeSeal Read more