Rust-Oleum LeakSeal
  • Rust-Oleum LeakSeal

Rust-Oleum LeakSeal

Rust-Oleum LeakSeal™ is an easy-to-use, rubberised protective utility coating designed to fill and seal leaks and cracks.


  • Seals leaks and cracks water-tight
  • Paintable finish
  • Anti-rust/corrosion
  • Will not sag/drip
  • Can be topcoated after 24hrs
  • Now available in:
    • Clear
    • Aluminium
    • White
  • Current colour: White
Choose a colour
Close colour picker
  • Clear
  • White
  • Black
  • Aluminium
VAT excluded

£13.63 Tax incl.


Rust-Oleum LeakSeal™ is an easy-to-use, rubberised protective utility coating designed to fill and seal leaks and cracks. It provides 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 water-based or oil-based paints after 24 hours.

Recommended Uses

  • Gutters
  • Roofs
  • Flashing
  • Ductwork
  • PVC
  • Masonry
  • Concrete

New Colours!

  • CLEAR - Perfect for masonry, concrete or visible substrates.
  • ALUMINIUM - Great for metal, i.e. air conditioning/industrial piping. 
  • WHITE - Ideal for uPVC windows and doors.

A test spray on cardboard is recommended to obtain feel for spray pattern. Spray surface in short, even strokes. Hold can 8-18" from surface. It is recommended to apply a light first coat. The second coat can be applied heavier. Quicker build-up can be achieved by moving nozzle closer in to gap.


It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Product Details

Data sheet

Typical Coverage (per coat)
0.74m² per can
Touch Dry
20-30 Mins

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

questions Peter Lapage on 26/02/2019

My roof has water ingress at the lead flashing. Is this the best to use to seal the flashing at the brick wall?


Rust-Oleum LeakSeal may work here but Rust-Oleum Mathys Fillcoat Fibres would be a better option.

questions Adrian price on 08/01/2019

Would it be ok on 40 year old asbestos cement board / corrugated sheeting ?


Rust-Oleum LeakSeal is for small patch repairs, if you are wanting to seal a small crack, or apply over a fixing/bolt then this should be fine for temporary protection. However, if you wish to coat the whole roof you would be better looking at something like GacoPro Roof Coating.

questions Gary cailler on 22/11/2018

I have a 3 year old shed that has started to leak water where the ash felt roof is seamed down the middle. Can I use your product to seal the seam to prevent further water leakage? Thank you.


We would instead recommend Britannia Aquashield Emergency Leak Repair.

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