Goldstar Stucco Putty Exterior is a water based multipurpose paste filler used for repair of small defects such as shrink holes, cracks and dents on masonry surfaces. It is also used for smoothening uneven surfaces. Goldstar Stucco Putty Exterior is formulated specially for interior use only. It can be applied on many surfaces including cement/gypsum plaster, concrete, wood, MDFand hard boards. It is easy to sand and is especially used to conceal unevenness in concrete wall by providing on even smooth finish.