£138.00 inc. VAT

Ultraflex Liquid Waterproofing - 15kg

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£138.00 inc. VAT


Product Description

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

Important Notice

Stir thoroughly before use. Always use PU based mastics to fill cracks, splits or joints.

Product Specification

Application Method Solvent resistant roller
Application Temperature 2ºC - 30°C
Brand Ultraflex
Colour Dark Grey (RAL 7042)
Coverage 8-10 sqm approx
Curing Time 24 hours
Drying Time 2–8 hours
Elongation 100% (when reinforced with Ultraflex Matting)
Guarantee 15 years
Product Type Liquid waterproofing
Storage Cool dry place within 5°C – 25°C
Tensile Strength 10 MPa (when reinforced with Ultraflex Matting)
Viscosity Value 2.650 cps
Water Vapour Resistance µ=2.500
Weight 15kg

Product Reviews


All Sterlingbuild orders have FREE standard delivery when your order is over £100 + VAT.

However next day delivery will carry a small next day delivery charge which will be shown in the final shopping basket

Unfortunately additional delivery charges will apply if you live in the Scottish Highlands and UK islands. These delivery charges are based on additional costs from our national couriers.

If additional shipping fees apply, a member of our team will contact you before processing your order to let you know.

We will do our very best to make sure your delivery arrives by the date required, however manufacturer availability and delivery schedules cannot always guarantee this.

Should your estimated delivery date differ from that displayed on our website, one of our team will inform you by email or telephone

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