Which of the following is a common sealant used in air barrier applications?

Silicone sealants are commonly used in air barrier applications due to their excellent properties that contribute to effective sealing. They possess high elasticity, allowing them to accommodate building movement without losing adhesion or developing cracks. Additionally, silicone sealants have superior weather resistance, maintaining their performance in a range of temperatures and conditions, which is critical for ensuring an effective air barrier.

Their durability enhances long-term performance, making silicone sealants particularly useful in environments exposed to UV radiation, moisture, and extreme temperatures. This makes them suitable for applications where maintaining an airtight seal is necessary over the lifespan of the building system.

While other sealants, such as acrylic and polyurethane, also have their uses in various sealing applications, they may not offer the same level of durability or elasticity required for effective air barriers in all situations, making silicone a preferred choice in many air sealing scenarios.