What should the backing plate used for thick layer, plastic installations be coated with?

In the context of thick layer, plastic installations, the backing plate should be coated with a parting agent. A parting agent is specifically designed to create a barrier between the installation material and the underlying surface, facilitating the separation of the cured or set refractory from the backing plate. This is particularly crucial in thick layer applications, as it helps to prevent the material from bonding too strongly to the backing, which could complicate removal and potentially damage the installation. Using a parting agent ensures that the integrity of the application is maintained while allowing for ease of workability during the installation process.

Other types of agents, such as binding agents, release agents, and bonding compounds, serve different purposes and may not provide the necessary separation required in this specific context. A binding agent is used to promote adhesion between materials, a release agent is often associated with surfaces being released from molds, and a bonding compound can create a strong connection between two surfaces. However, when focusing on the requirement for thick layer, plastic installations, the parting agent is the most appropriate choice to facilitate safe and effective removal of the installation from the backing plate.