What are Cutback Coatings primarily composed of?

Cutback coatings are primarily composed of various grades of asphalt that have been cut back with a solvent. This process reduces the viscosity of the asphalt, making it easier to work with during application. The solvent allows for a smoother application and quicker drying, which is essential for roofing materials that need to adhere effectively to surfaces.

The use of solvents in cutback coatings also helps in achieving a more uniform consistency, which is crucial for ensuring proper adhesion and waterproofing properties once the solvent evaporates. This characteristic makes cutback coatings particularly valuable for Built-Up Roofing (BUR) systems, especially in complex applications like repairs or touch-ups, where the roofing material must adhere well to existing surfaces.

Other options, while they may reference aspects of roofing materials or techniques, do not accurately describe the composition of cutback coatings as effectively as the correct answer does.