What is the primary function of bond breaker tape in firestopping applications?

The primary function of bond breaker tape in firestopping applications is to reduce stress on joints. When two materials expand and contract due to temperature changes, they can create movement that puts stress on the sealant used between them. Bond breaker tape is applied to the joint or gap to prevent the sealant from adhering to one side, allowing for some movement without compromising the integrity of the seal. This helps to maintain the firestop's effectiveness and ensures that it continues to provide a barrier against fire and smoke as intended.

In this context, while creating a vapor barrier, improving adhesion, or serving as structural support are important in various construction applications, they do not represent the specific functionality of bond breaker tape in firestopping. The main purpose of bond breaker tape is uniquely focused on allowing controlled movement and mitigating stress, which is essential in maintaining the longevity and performance of firestopping systems.