If a listed through penetration does not specify caulk type, what can be used?

When addressing the question of what caulk can be used if a listed through penetration does not specify the caulk type, the choice highlighting that different manufacturer’s caulk can be utilized, as long as it has been tested and listed, is the most appropriate.

This is grounded in the understanding that firestop systems are designed to maintain the fire resistance of a rated assembly. If a listed system exists, it means it has undergone testing to ensure that it meets specific safety and fire resistance standards. Therefore, any alternative caulk used must also be tested in conjunction with the same penetration system to guarantee it will perform effectively in preserving those fire-resistant properties. Utilizing a product that has the same certification guarantees that the performance and reliability of the fire-protective measures are maintained.

Utilizing generic caulk or caulk from different manufacturers without this testing may not ensure compliance with safety standards since they haven't been assessed under the same conditions, which can lead to unpredictable and potentially unsafe results. Using only environmentally friendly caulk without adherence to the product compatibility and testing requirements also fails to ensure that the performance of the firestop system remains intact.