Elastomeric Patch Smooth Brush Grade Patching Compound is formulated as a positive patching system for the permanent repair of cementitious substrates such as, stucco and masonry cracks and surface damage. It will also adhere to most any clean surface. It is designed to maintain maximum flexibility through a wide range of temperature changes with minimal shrinkage and provide long term durability. Provides maximum resistance to wind driven rain and is mildew resistant. For Interior and Exterior use!