Depending on how big your tank is and how thick the silicone applied is, most sealants are touch dry within a few hours and sets in a day (24 hours) or two (48 hours). However, full strength is usually not attained until after a week or so.
How long should silicone dry before adding water?
It’s not recommended to expose the silicone to moisture before the caulk cures completely to ensure the caulk is completely waterproof. However, if you can’t wait 24 hours, you should at least wait 12 hours.
What happens if silicone sealant gets wet before it cures?
What happens if caulk gets wet before it cures? If caulk gets wet before it is allowed to completely cure, it’s formula won’t perform as intended. That could mean it’ll take longer than advertised to dry and cure or, worse, the tight seal you were hoping to create will be compromised.
How long does it take for sealant to dry?
It might seem that certain shower sealants or caulks are dry to the touch quickly after application, but they actually take around 24 hours to properly cure fully.