Firestopping materials are always listed.

• A. True
• B. False
• C. Sometimes
• D. Not applicable

Answer: (B)

Firestopping relies on tested and listed systems, not on every material being listed by itself. A listing is for a complete firestop system—the specific combination of material type, installation method, and the exact penetration details within a given wall or floor assembly. That listing shows the system has been tested and proven to achieve a certain fire-resistance rating. You must install using that listed system and follow its exact instructions. So, saying that firestopping materials are always listed isn’t accurate because the important requirement is that the installation matches a listed system, not that every individual material used is listed on its own. For example, a penetration through a fire-rated wall is protected by a specific listed system that specifies the exact sealant, backing, and placement; substituting another material or altering the setup would require a new listing or a different approved system.