Rust-Oleum® Rubberized wet patch is a premium quality, heavily fibered, asphalt-base roof cement blended with penetrating oils and plasticizing agents that can be applied directly to cold, hot, wet, dry or underwater surfaces. Rubberized wet patch can be used to repair and restore flashings and roofing defects such as blisters, cracks and punctures. It can also be used to bond new asphalt plyand modified bitumen membrane flashings or seal vents, shingles, skylights and chimneys. Rubberized wet patch resists sags and spreads easily in cold conditions. For exterior use only.