In order to use a different manufacturer's caulk for a listed through penetration, what requirement must be met?

Using a different manufacturer's caulk for a listed through penetration requires that the complete system has been tested and listed with that different manufacturer's caulk. This ensures that the caulk will provide the necessary fire resistance and other performance characteristics established during the initial testing and listing process. The integrity of through penetrations is critical for maintaining fire ratings and preventing the spread of smoke and fire, hence why it is essential to adhere to the same standards applied during the original testing.

By ensuring that any changes to components, such as caulk, meet the same rigorous testing and listing requirements, you are safeguarding the effectiveness of the through penetration system. The need for a product to be listed with the system confirms that it has been evaluated under similar conditions and will perform as expected when installed.