RustOleum Wet or Dry Roof Repair is a fibered asphalt based cement that provides a strong and flexible seal and resists cracking Ideal for installing or repairing roof flashings at valleys parapet walls gravel stops stacks vents monitors and similar applications Also suitable for sealing cracks in exterior foundation and chimney walls It is perfect for use with fiberglass or polyester fabric or roll roofing for permanent repairs RustOleum Wet or Dry Roof Repair applies fast and smooth without stringing.