Silicone caulking is used in bathrooms around tubs, toilets and sinks to seal out water. Some caulking can be painted whereas other types do not need to be covered. A project using silicone caulking requires some time after the project is complete for the substance to cure or set up.
Most caulking is dry to touch after about two hours. In a more humid environment, it may take longer for the caulk to dry. The amount of caulk applied to a surface can also affect how long it takes to dry; make sure to wipe away excess caulking for a quicker drying time.
Exposure to Paint
Caulk should be dry to the touch before it is painted. Manufacturer Polyseamseal Ultra recommends a minimum of two hours drying time before paint is applied and two more hours of drying time between coats of paint.
Exposure to Water
To get the maximum water-seal protection from silicone caulking, wait at least 24 hours, although 48 hours is preferred, before exposing the caulking to water. After 24 to 48 hours, the caulking should form enough of a seal to prevent leakage.