The fast, easy way to make sure the repairs you make to cracks in plaster, drywall and wood stay repaired. Just spray Good-Bye Cracks over the repaired area. It goes on like paint, but dries to form an elastic cover that"s flexible - to keep cracks from reappearing. Use it on, Plaster, Drywall, Concrete, Wood, and Masonry – and say Good-bye to cracks once and for all. Repairing cracks with only spackle or other rigid compounds is not enough to keep them from reappearing. Continued movement will simply break the repair, and cause the cracks to appear again and again. If the crack opens up again, Good-Bye Cracks" flexible elastic sealer will stretch to bridge the gap.