Skip to product information
1 of 3

Polar Coatings

Polar 'One Coat Repair' LeakSeal Sealant Cartridge

Low Shrinkage
Long Lasting
For All Roofs & Gutters
Colour — Black
Regular price
Sale price
    Free next day delivery on orders over £40. Learn more
    Free Technical Support
    Quality Assurance
    Made in the UK
    5% Business & Trade Discounts Contact Us
    Accepted Payment Methods
    Visa Mastercard American Express Discover Diners club Apple Pay

    Product Details

    WATERPROOF SEAL - The ideal solution for instant and fully waterproof sealant on emergency leaks or cracks. Apply to the affected surface area of the roof, drainpipe or gutter to instantly seal. Forms a waterproof membrane to keep damp and water out. 

    ONE COAT REPAIR - Don’t waste any time sealing cracks or leaks. Polar LeakSeal Sealant works in just one coat. Developed to give instant repair with excellent adhesion to various surfaces. A non-hardening solution that reacts to surfaces instantly.

    INSTANT PROTECTION - Specially formulated with reinforced fibres that interlace to give tough, durable and instant protection. Ideal for emergency repair or maintenance work on drain pipes, gutters and roofs. Gives long-lasting protection to cracked or leaked surfaces, once fully dried and cured. 

    EASY TO APPLY - No primer is needed prior to application of Polar LeakSeal Sealant. Apply immediately for instant waterproof protection. Clear the affected area of moss and debris and remove any surface water, oil or grease. Easy to use sealant cartridge gun provides outstanding coverage and accuracy to the affected area. 

    MULTI-PURPOSE USE - Ideal for use on flat and pitched roofs, weathered asphalt, bitumen surfaces, felt shed roofs, gutters, drainpipes, concrete, brick, GRP, fibreglass roofs, felt roofs, metal roofing surfaces, cladding and vehicle body panels. Available in Grey or Black.

    Use For The Following Surface Types


    Technical Specifications

    Interior/Exterior Exterior
    Dry Time Touch Dry: 24-48 hours
    Colours Black & Grey
    Application Temperature 5°C
    Size 310ml



    All surfaces must be clean and dry and free from dirt, dust, grease and other contamination.
    Check the compatibility of the sealant with the surface for staining, adhesion etc.


    The sealant should be applied by applicator gun, firmly onto the surface to ensure good contact and adhesion.
    LeakSeal Sealant is plastic in nature and the mechanical performance decreases with increased temperature.

    Finishing Up

    After application the exposed surface of the sealant becomes tack-free by solvent loss over the next 24-48 hours, depending on temperature, to produce a tough rubberized plastic seal.

    Related Videos