DAP Presto Patch is an all-purpose, high-performance patching compound formulated to set fast and dry hard. The set time is 10-15 minutes, and it is ready to paint in 30 minutes. Great for all interior wall, ceiling, and floor projects. Presto Patch is easy to mix with water, non-shrinking, and sandable. It may be filled, drilled, or nailed once dry. This powerful patch allows you to finish any project in less time than traditional patching compounds. In addition, it provides excellent floor underlayment for patching and leveling before installing floor coverings. However, it is only recommended for areas that collect standing water or receive continuous moisture if coated with a waterproofing product.