Rust-Oleum LeakSeal makes it easy to stop gutter leaks. Spray the flexible, rubber coating over cracks and small holes to repair leaky gutters and other outdoor surfaces, like downspouts and vinyl siding.
Remove any dirt or debris from the part of the gutter you plan to coat. Use a tarp or painter’s tape to protect any surrounding areas from overspray.
Working in dry conditions, hold the can 8-18” from the surface of the gutter. Apply LeakSeal in short, light sprays. Apply 3-4 light coats, waiting 10-15 minutes between each one.
The flexible, watertight sealant can be left as is, or top coated with latex paint or oil-based paint, if you desire.