Can this reattach pool tile if backing is damp?

Hi there, great question! To achieve the best results for underwater/wet applications using Flex Glue, we recommend these steps: 1. Make sure the surface is completely clean and free of such things as grease, oil, dirt, and algae. 2. Apply liberally to one side of the surface to be bonded. 3. Apply firm pressure continuously for a minimum of 10-30 seconds for the instant grab effect to take hold. 4. Object may be repositioned within 10 minutes of application if needed. 5. Product cures in 24 to 48 hrs. Let us know if you have any more questions at humans@flexsealproducts.com. We're always here to help you!