Leakseal Black 500ML

FREE next working day delivery available
£21.37 inc. VAT
Trade customer? - log in to get your prices. close

Tell us where you are to check stock for Click & Collect:

Rubberized coating to fill and seal leaks.
Leakseal Black

In detail

An easy to use, rubberized protective utility coating designed to fill and seal leaks and cracks on metal, aluminium, galvanized metal, PVC, concrete, masonry, asphalt/bituminous roofing materials, vinyl siding, fibreglass, and more.


Available colours

Rustoleum Leakseal Black is available in 1 colours from the Rustoleum Colour Cards.

    Browse colours


    Always ask your client to try their colour choice on the wall first. Colour cards and emulsion sample pots are available at your local Brewers or at

    Additional information

    Surface Preparation

    Remove all dirt and debris from the area to be coated. Wash area with a detergent and water solution, rinse with fresh water, and allow the surface to dry thoroughly. Remove any loose paint or previous coatings with a wire brush or sandpaper. Lightly sand glossy surfaces. Wipe the sanded surface clean when finished. Test previous coated material for compatibility before use.


    • Use outdoors or in a well-ventilated area such as an open garage.
    • Apply when temperature is between 50ºF and 90ºF (10 - 32ºC) and humidity is below 85% to ensure proper drying.
    • Do not apply to surfaces, when heated, exceed 200ºF (93ºC).
    • Avoid spraying in very windy and dusty conditions.
    • Cover surrounding area to protect from spray mist.
    • Shake aerosol vigorously for one minute after the mixing ball begins to rattle.
    • If mixing ball fails to rattle DO NOT STRIKE CAN. Contact Rust-Oleum for technical support.
    • A test spray on cardboard is recommended to obtain feel for the spray pattern.
    • Hold the aerosol 8-18” (20 - 45 centimetre) from the surface and spray in short even strokes.
    • It is recommended to apply a light first coat. Apply a second heavier coat to ensure proper coverage.
    • A thicker film can be achieved by moving the nozzle closer to the surface.
    • Initial spray may have some foaming or bubbling, but will dissipate as the coating dries.
    • For best results, apply 2 coats.
    • Allow to dry 15- 30 minutes between coats.