Fixing Narrow Cracks

• 1). Dry brush the crack to remove any loose debris. Work until the crack is completely clear of dust and concrete residue.
  
  
• 2). Apply concrete caulk directly into the concrete crack. Push the caulk into the crack with the caulk nozzle.
  
  
• 3). Smooth the caulk with a paint scraper so that it lays flat over the concrete surface.
  
  
• 4). Let the caulk dry completely according to the manufacturer's directions.