Which of the following could be considered a bonding agent for SFRM?

In the context of spray-applied fire-resistive materials (SFRM), a bonding agent specifically refers to a product designed to enhance the adhesion of the fireproofing material to the substrate. This ensures that the SFRM remains securely attached and performs effectively in protecting structural elements from fire.

The use of a dedicated bonding agent is crucial, as it is formulated to work with SFRM and improve its performance and longevity. This includes providing a strong bond, which is essential to maintain the fire-resistant properties of the SFRM and to help it withstand environmental factors such as moisture and temperature changes.

While other options might have adhesive properties or uses in construction, they may not be specifically designed or optimized for use with SFRM. For instance, an acid primer could be used to prepare surfaces in some scenarios, but it does not serve the same purpose as a dedicated bonding agent for fireproofing applications. Similarly, silicone adhesives or epoxy are types of adhesives but may not provide the specific benefits or compatibility required with SFRM.

Therefore, referencing the specific use and formulation of a bonding agent clarifies why it is the correct choice for enhancing the performance of spray-applied fireproofing.