Yes, you can use this hair mousse for day 2. However, when you re-wet hair, judge how much product you have in your hair already before you apply more. You will need to use your judgment and apply the right amount based on feel. We would recommend you start with half of the recommended dosage and apply more if needed.
Re-wet hair and, while scrunching, judge the amount of product left in your hair by how sticky or slimy hair becomes and apply more product only if necessary based on feel. Once hair dries, the resin should set the hair to new shape again. This will only work with aqueous stylers such as gels and mousse, not aerosol hairsprays.