Metacaulk pipe collars are prefabricated firestop systems for through-penetrations using PVC, CPVC, ABS, PVC foam core, ABS foam core, FRPP, PEX pipe and electrical cable. UL classified for both open and closed pipe systems. Metacaulk pipe collars feature an easy locking mechanism that assures simple installation. The collar's design greatly reduces the time and expense required to install competitive collars.