Ultraflex is a high-performance liquid waterproofing system that can be applied straight from the tin onto a new or existing flat roof to form a seamless membrane.

    Designed to be used in conjunction with Ultraflex Matting and Topcoat, the Ultraflex system is highly suitable for waterproofing extensions, balconies and terraces, including detailed areas, such as box gutters.

    Ultraflex has been consciously manufactured to be usable for both industry professional and DIYer alike, on substrates ranging from torch-on felt and plywood, to metal and concrete.

    Simply apply Ultraflex onto the substrate using a solvent resistant roller, dry roll Ultraflex matting into the Ultraflex until it is drawn through, then immediately apply another coat of Ultraflex to a minimum thickness of 1.5mm to fully embed the matting, while avoiding any pinholes.

    Practical for both new projects and repair jobs, Ultraflex can be applied all year round in most temperatures to provide a waterproof surface area of 10 sqm up to 1,000 sqm.

    Ultraflex is fully trafficable within 24 hours of application and BBA certified for a lifespan in access of 25 years. A full list of technical data can be found in the PDF on the right-hand side of this page.

    Features & Benefits

    • Liquid waterproofing system for new and existing flat roofs and surfaces
    • DIY friendly
    • Dark grey finish (RAL 7043)
    • Ready to use straight from the tin. No additives or primer needed
    • One 15kg tin covers up to 10 sqm depending on surface
    • Installable all year round- moisture curing
    • BBA certified for in access of 25 years
    • NHBC and Green Roof approved
    • Trafficable after 24 hours
    • Excellent adhesion to most substrates (patch test to check compatibility with EPDM)
    • Suitable for flat roofs, balconies, walkways, terraces, gutters and more
    • 15-year guarantee for non-trained installers, 20/25 years for trained installers
    £122.97 - (Inc VAT) £147.56


    £122.97 - (Inc VAT) £147.56
  • ULTRATOP Ultraflex Topcoat 5L

    UltraFlex TopCoat 5kg

    Ultraflex can be used on new or existing roofs, walkways, balconies, gutters etc.

    5kg of Ultratop Top Coat will cover approx 30 sqm.

    • Ready to use straight out of the tin, application with solvent resistant roller.
    • Use fully reinforced with Ultraflex matting ensures easy “wet on wet” application.
    • Can be used all year round – moisture curing.
    • Fully trafficable when cured.
    • Instantly rain resistant after application.
    • Once installed, forms a seamless membrane.
    • Fresh concrete must be cured for 28 days.
    • Excellent adhesion to different substrates: plywood, bitumen membranes, asphalt, metals, brick, concrete, wood etc.
    • On EPDM and TPO it is recommended to install patch test to check compatibility.
    • Do not use silicone sealants. Always use PU based mastics.

    Ultraflex is BBA certified for life in excess of 25 years.

    Ultraflex is NHBC and Green Roof approved.

    £96.93 - (Inc VAT) £116.32

    ULTRATOP Ultraflex Topcoat 5L

    £96.93 - (Inc VAT) £116.32