Rust-Oleum LeakSeal is an easy to use, rubberized protective coating designed to fill holes and seal cracks. Creates a water-tight, flexible seal that prevents moisture penetration, rust and corrosion. LeakSeal dries to a semi-smooth, firm finish that will not sag or drip and can be top-coated with latex or oil-based paints. Durable, rubberized coating designed to fill and seal leaks and cracksInterior / Exterior use on metal, aluminum, galvanized metal, PVC, concrete, masonry, asphalt roofing materials, vinyl siding, fiberglass and moreFormulated to provide firm-but-flexible protection against moisture and rust on the surfaces that need it mostDries to the touch in 1 hour, can be recoated in 30 minutes and is fully cured in 24 hours