01732 360 095

HydroBond 2K-Flex

HydroBond-2K-Flex

  1. Radon-Certified Strength: HydroBond 2K-Flex, certified for radon gas, forms a tough, flexible barrier. Perfect for external waterproofing, it quickly seals cracks and joints in earth-retaining structures.
  2. Eco-Friendly Flexibility: Environmentally conscious and solvent-free, HydroBond 2K-Flex reacts for a firm, flexible coating. Apply swiftly with a trowel or spray, securing insulation to various surfaces, and drying rapidly.
  3. Complete Defense, Quick Dry: HydroBond 2K-Flex ensures rapid waterproofing. Ideal for securing insulated panels, it works seamlessly with HydroBond 2K-Flex Primer and HydroBond 2K-Flex Mesh for a comprehensive solution.

A radon gas certified, bitumen/rubber waterproofing membrane used primarily for the external waterproofing of earth-retaining structures such as basements and foundation walls. Forms a thick, highly flexible barrier to water ingress that can be applied to fill voids, cracks and joints.

Environmentally friendly and solvent-free, HydroBond 2K-Flex consists of two components; a bitumen emulsion and a reactive powder. These two components chemically react when mixed to produce a firm, yet still highly flexible coating that can be applied by trowel or by airless spray machine. Adhering insulated panels to concrete, masonry and thoroughly dried thick bituminous coatings, 2K-Flex dries quickly and is rain-fast after a short period.

HydroBond 2K-Flex requires two ancillary products, HydroBond 2K-Flex Primer and HydroBond 2K-Flex Mesh.

HydroBond-2K-Flex-Primer_5ltr

HydroBond 2K-Flex Primer

A fast-drying bitumen emulsion primer and bonding agent that is applied to the substrate prior to the application of the Newton HydroBond 2K-Flex reinforced bitumen waterproof coating. The product adheres well to concrete, masonry, plaster and most other common construction substrates.

HydroBond-2K-Flex-Mesh

HydroBond 2K-Flex Mesh

A reinforcing mesh made from woven fibreglass yarns and coated with an alkaline resistant latex which prevents the alkaline present in cement from degrading the glass fibre.

  • Key Benefits
  • Typical Waterproofing Applications
  • Technical Data
  • Key Benefits

    Key Benefits

    • Thick coating, fully-bonded seamless waterproofing membrane with excellent crack-bridging capabilities.
    • Particularly easy trowel application due to low material weight.
    • Fast reaction time due to the special powder catalyst.
    • Highly flexible with 2 mm crack bridging due to high-quality polystyrene and polymer modification.
    • Quick-drying and rain-fast after a short period.
    • Solvent-free, non-toxic and odourless.
    • Non-flammable – No VOCs.
    • Radon gas resistance.
    • Sprayable with suitable equipment.
    • Adheres insulating panels to concrete, masonry and thoroughly dried thick bituminous coatings.

    Typical Waterproofing Applications

    Typical Waterproofing Applications

    • Continuous Type A waterproofing and radon protection of retained structures, together with Newton HydroBond pre-applied membranes.
    • Type A waterproofing and radon membrane for basement, foundations and earth-retained walls.
    • Smoothing of irregular surfaces prior to application of bitumen-based membranes.

    Technical Data

    Technical Data

     Cured Performance  Result
    Colour Black
    Membrane thickness – two coats  4.0 mm
    Compressive strength – Class C2A 0.30 MN/mm2
    Crack bridging ability (no reinforcement) – Class CB2  >2 mm
    Resistance to fatigue movement – 1000 actions @ -10°C  Pass
    Dimensional stability at high temperature – no sliding  Pass
    Flexibility at low temperature  Pass
    Water vapour resistance – SD value  26.3 m
    Water vapour resistance – μ value 6575 μ
    Water vapour resistance  132 MNs/g
    Water tightness -W2A  0.075 N/mm2
    Water resistance – 21 days at 21°C  Watertight
    Durability of water tightness and fire behaviour  Pass
    Radon gas diffusion resistance (4 mm membrane)  1.13 x 10-11 m2/s
    Reaction to fire classification (Euroclass) E

    Customer Success Stories

    Our latest customer reviews from Feefo - the award winning review platform

    view all reviews

    Speak to our friendly, expert team

    Our staff are able to provide guidance for projects of all sizes, whether you require some general advice about damp or waterproofing, or support with technical drawings and specifications.


      By submitting your details you confirm that you agree to the storing and processing of your personal data by Newton Waterproofing as described in the privacy statement.

      We will be closing between Christmas and New Year, with the last day of operations being Friday 20th December. Last orders for delivery before Christmas therefore need to be placed by 2pm on Thursday 19th December, with final deliveries on Friday 20th December. After this, no deliveries will be possible until January 2025. The Newton branches in Tonbridge and Leeds will reopen in the New Year on Thursday 2nd January 2025.