An all-purpose, high-performance patching compound formulated to set fast and dry hard. Interior wall, ceiling and floor projects. Working time is 5 to 10 minutes and set time is 30 minutes. 3 days for final curing. Great for all interior wall, ceiling, and floor projects. Non-shrinking and sandable. This powerful patch allows you to finish any project in less time than traditional patching compounds. Provides an excellent floor underlayment for patching and leveling before installation of floor coverings. Not recommended for areas that collect standing water or receive continuous moisture.