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HydroCoat 1 Render

  • One-Coat Waterproof Render Strength: HydroCoat 1 Render is a single-component, fibre-reinforced, polymer-modified cementitious waterproof render for internal Type A applications. Its one-coat application creates a durable, fair-faced finish on concrete and masonry substrates.
  • Single-Coat Application, Consistent Performance: HydroCoat 1 Render applies quickly by trowel or spray to vertical and overhead surfaces. Consequently, it reduces programme time while delivering consistent thickness and reliable waterproofing performance across complex internal structures.
  • Monolithic Bond, Long-Term Protection: The cementitious render develops high bond strength that exceeds the tensile strength of concrete. Therefore, it forms a fully bonded, monolithic waterproof barrier that resists lateral water tracking under positive and negative pressure.

    One-Coat Cementitious Waterproof Render – Technical Overview

    Applied to prepared concrete and masonry, HydroCoat 1 Render delivers effective internal waterproofing as part of a Type A system. As a result, it provides a robust waterproof render solution for walls, soffits, and earth-retained structures.

    The fibre-reinforced, polymer-modified formulation cures rapidly to form a dense, durable render. Consequently, installers achieve reliable waterproofing performance with a consistent finish using a single-coat application. At a thickness of 10mm, HydroCoat 1 Render resists up to 7 bar of positive or negative water pressure. The system performs reliably in demanding internal environments and delivers long-term resistance to moisture under sustained exposure conditions.

    The cementitious structure offers low water permeability and high resistance to chemical ingress. As a result, the waterproof render maintains durability in basements, tunnels, tanks, and other retained structures.

    This one-coat cementitious waterproof render forms the wall and vertical waterproofing element of the Newton HydroCoat 1 System. When used alongside HydroCoat 1 Screed, it delivers a complete internal Type A waterproofing solution. The system suits basements, foundations, lift pits, tunnels, and retaining walls and delivers reliable internal waterproofing performance. It delivers dependable internal waterproofing across demanding below-ground and earth-retained structures.

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

    Key Benefits

    • Waterproof – 10mm thickness resists 7 bar positive or negative pressure
    • Simply mixed with clean water, no need for primers
    • The thixotropic nature allows fast and easy application
    • Cost-effective one-coat application
    • Polymer modified for excellent adhesion and long-term durability in exposed external applications
    • Low-cost application, 5-50mm applied in a single coat
    • High tensile strength, impact strength and crack resistance
    • High diffusion resistance to acid gases & chloride ions
    • Easily overcoated with specialist membranes to provide further protection and aesthetic quality
    • Pre-packaged material requiring mixing with clean water to give an easily trowelable mortar, which achieves a wide range of application thicknesses from a single product
    • Conforms to the requirements of BS 8102:2022, providing the optimum ‘Grade 3’ completely dry environment
    • High bond strength exceeds the tensile strength of concrete, ensuring monolithic performance
    • Part-bags can be mixed

    Typical Waterproofing Applications

    Typical Waterproofing Applications

    Suitable for surface protection systems principles 2.2, 5.1, 6.1, 8.2 as defined in BS EN 1504-2.

    Negative Water Pressure:

    • Internal waterproofing of retaining walls, slabs and rafts of basements, foundations, tunnels, tanks and lift-pits

    Positive Water Pressure:

    • Retaining and curtain walls
    • Water tanks, swimming pools, irrigation canals, concrete pipes, tunnels, culverts and manholes

    Technical Data

    Technical Data

    Features

    Result

    Units

    Form – Single Component Powder
    Colour Grey
    Mixed Density – At 0.10 water : powder ratio 1.9 kg/litre
    Pack size 25 kg
    Shelf life 12 Months
    Yield per 25 kg pack 13.15 Litres
    Coverage per 25 kg pack at 10 mm thickness 1.45
    Application rate – waterproofing render 1.725

    Kg/mm/m2

    Application rate – 10mm waterproofing render 17.25 Km/m2
    Application thickness – HydroCoat 1 System 10 mm
    Minimum application thickness – as a render 5 mm
    Water requirement – per 25kg of power 2.7 – 3.0 Litres
    Resting period before application Use immediately
    Pot Life/working life at 20 °C 30 Minutes
    Application temperature +5 to +35 oC
    Service Temperature -20 to +70 oC
    Odour None
    VOC content None

    FAQ

    FAQ

    What is a cementitious waterproof render?

    A cementitious waterproof render is a cement-based coating applied to walls to create a bonded, watertight barrier against moisture ingress.

    Where should HydroCoat 1 Render be used?

    HydroCoat 1 Render is designed for internal walls, soffits, and earth-retained structures within Type A waterproofing systems.

    Can HydroCoat 1 Render be applied in a single coat?

    Yes. The system applies in a single coat while delivering consistent thickness and reliable waterproofing performance.

    What water pressure can HydroCoat 1 Render resist?

    At a thickness of 10 mm, HydroCoat 1 Render resists up to 7 bar of positive and negative water pressure.

    Can HydroCoat 1 Render be applied to damp substrates?

    Yes. Installers can apply the render to damp concrete and masonry when substrates are correctly prepared.

    Does HydroCoat 1 Render prevent lateral water tracking?

    Yes. The render forms a fully bonded, monolithic barrier that resists lateral water tracking under pressure.

    Does HydroCoat 1 Render form part of a Type A waterproofing system?

    Yes. When used with HydroCoat 1 Screed, it forms a complete internal Type A waterproofing system in accordance with BS 8102:2022.

    Does the render require protection or overcoating?

    Yes. Installers can overcoat the render with specialist membranes or finishes where additional protection or aesthetics are required.

    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.


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