Basement Floor Crack Repair | HGTV- how to seal cracks ,Seal the concrete patch and allow it to dry for several days. Certain cracks may be the result of structural damage and might require the help of a professional engineer or foundation specialist. More on Basement Crack RepairsHow to Repair Cracks in Vertical Concrete Surfaces with ... · Sealing the cracks with QUIKRETE is an easy project for any skill level. This video shows you how to fix cracks in a vertical concrete surface or wall. Category