How long do you need to wait between applying coats?

Generally, one should wait 6 to 12 hours between coats as this is how long it takes Flex Seal Liquid to feel dry to the touch. For best results, start with a clean dry surface free of such things as grease, oil and dirt. Apply in multiple thin even coats allowing each coat to dry before adding the next. Product fully cures in 24 to 48 hours. Please note, drying and cure times may vary based on the thickness of each coat and the relative humidity in the surrounding environment. Thank you for your interest in the Flex Seal Family of Products.