Which is not a physical property once liquid-applied roof membranes are cured?

Which is not a physical property once liquid-applied roof membranes are cured?

• A. Heat resistance
• B. Flexibility
• C. Weathering resistance
• D. Adhesion

Answer: (A)

After curing, a liquid-applied roof membrane forms a solid film, and its physical properties describe how that film behaves in service. The key physical properties are how well the film adheres to the substrate, how flexible it remains to accommodate building movement, and how well it resists weathering from sun and moisture. Heat resistance is a thermal property—relating to how high temperatures the material can withstand—rather than a fundamental physical property of the cured film’s everyday behavior. So, while heat resistance matters for overall performance, it isn’t considered a physical property in the same sense as adhesion, flexibility, or weathering resistance.

After curing, a liquid-applied roof membrane forms a solid film, and its physical properties describe how that film behaves in service. The key physical properties are how well the film adheres to the substrate, how flexible it remains to accommodate building movement, and how well it resists weathering from sun and moisture. Heat resistance is a thermal property—relating to how high temperatures the material can withstand—rather than a fundamental physical property of the cured film’s everyday behavior. So, while heat resistance matters for overall performance, it isn’t considered a physical property in the same sense as adhesion, flexibility, or weathering resistance.