UL Firestop Systems What is the difference between UL 1479 and UL 2079? 2025-01-13 UL Firestop Systems What is the difference between UL 1479 and UL 2079? Read More »Fire Partitions, fire protect section, Fire Sections, UL 1479, UL 2079, ul firestop systems, UL Sealed Through Wall Firestop Systems
