The Rust-Oleum 275116 LeakSeal Flexible Sealer dries to the touch in 1 hour and is fully cured in 24 hours. Please note that this is just a general guideline. The actual drying time may vary depending on the temperature, humidity, and airflow in the area where you are applying the sealer. It is always best to test the sealer in an inconspicuous area first to make sure that it dries to your satisfaction.