Rutland 510 No.7 Wet or Dry Roof Patch Excellent for patching worn roofing or sealing flashing, gutters, downspouts, eaves, ventilators, skylights, cornices, and roof edges All weather formula protects your roof against high winds and driving rain Use on asphalt, metal, or masonry surfaces Reinforcing fibers provides strength, protection and a long life Not for rubber surfaces