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HydroCoat 104 Super

  • Crystal Clear Moisture Defence: HydroCoat 104 Super blocks capillaries and cracks, keeping concrete dry with cementitious crystalline waterproofing. Its rapid application and low coverage rate of 1 kg/m² make it ideal for large areas.
  • Speedy, Cost-Effective Protection: HydroCoat 104 Super delivers a dry concrete surface through fast application. Consequently, its low material usage makes it suitable for a wide range of construction scenarios at a low cost.
  • Concrete Harmony, No Slip: The system penetrates deeply and leaves no physical membrane. Therefore, it provides effective moisture control in pile caps, ring beams, and kicker joints.

Cementitious Crystalline Waterproofing – Technical Overview

Applied to concrete surfaces, HydroCoat 104 Super provides in-depth crystalline cementitious waterproofing. As a result, it protects against moisture movement through capillaries and hairline cracks.

The active chemicals react with free lime and moisture within the concrete structure. Consequently, insoluble crystalline formations form, blocking capillaries and minor shrinkage cracks. This process prevents further moisture migration and produces a dry concrete surface.

Large areas can be treated quickly due to the simple application process of HydroCoat 104 Super. Moreover, the low application rate of 1 kg/m² makes HydroCoat 104 Super highly cost-effective.

Because the product penetrates deep into the concrete, no surface membrane remains. Therefore, it remains unaffected by structural loadings from subsequent construction elements. New concrete is placed concrete-to-concrete with no potential for slip or separation, which can occur with physical membranes. As a result, HydroCoat 104 Super is ideal for isolating moisture in pile caps and ring beams. It is also highly effective at kicker joints where internal walls connect to structural concrete.

This crystalline waterproofing system functions as an integral solution within the concrete structure. Unlike surface-applied barriers, cementitious crystalline waterproofing becomes part of the concrete matrix. As a result, crystalline cementitious waterproofing delivers permanent moisture resistance that cannot delaminate, puncture, or degrade over time.


  • Key Benefits
  • Typical Applications
  • Suitable Substrate
  • Case Studies
  • Technical Data
  • FAQ
  • Key Benefits

    Key Benefits

    • Ease of application – sprinkled on to new concrete and applied as a simple slurry to vertical and cured concrete.
    • Permeates deep into the concrete to form a barrier against moisture that cannot be damaged or punctured.
    • Loading capabilities only limited by the strength of the concrete.
    • No physical membrane – subsequent concrete placement is ‘concrete to concrete’.
    • Concrete treated with HydroCoat 104 Super remains vapour permeable, allowing the structure to ‘breathe’.
    • Easy to detail and specify as the concrete surface becomes the membrane.
    • Very cost effective alternative to conventional physical membranes.
    • Sealing of cracks up to 0.3mm resulting in dry concrete with less reinforcing steel requirement.

    Typical Applications

    Typical Applications

    • Pile caps and ring beams.
    • Support plinths.
    • Sealing of concrete surfaces.
    • Isolation of internal walls from moisture in the kicker joint.
    • Isolation of internal walls from moisture at the abutment with earth retained walls.

    Suitable Substrate

    Suitable Substrate

    Concrete with reinforcement to BS EN 1992 (Eurocode 2) with crack mitigation to 0.3mm

    Case Studies

    Technical Data

    Technical Data

     Cured Performance  Result
    Colour Grey
    Membrane thickness  N/A
    Adhesion to concrete > 0.8 MPa
    Tensile adhesion  0.7 MPa
    Elongation  3 to 5%
    Loading capability  As concrete applied to MPa
    Water permeability  < 5.0 x 10-13
    Water penetration < 20mm
    Fire testing – non-combustibility  Non-combustable

    FAQ

    FAQ

    What is HydroCoat 104 Super?

    HydroCoat 104 Super is a cementitious crystalline waterproofing system that penetrates concrete to block capillaries and seal hairline cracks.

    How does crystalline waterproofing work?

    Active chemicals react with moisture and free lime in the concrete to form insoluble crystals that block capillaries and minor shrinkage cracks.

    Does HydroCoat 104 Super leave a surface membrane?

    No. The system penetrates into the concrete matrix and leaves no physical surface membrane.

    Where is HydroCoat 104 Super typically used?

    Typical applications include pile caps, ring beams, support plinths, kicker joints, and isolation of internal walls from ground moisture.

    Can new concrete be placed over HydroCoat 104 Super?

    Yes. Because no physical membrane remains, new concrete can be placed concrete-to-concrete without slip or separation.

    Is HydroCoat 104 Super suitable for large concrete areas?

    Yes. The simple application method and low coverage rate of 1 kg/m² make it highly cost-effective for large areas.

    Does HydroCoat 104 Super remain vapour permeable?

    Yes. Concrete treated with HydroCoat 104 Super remains vapour permeable, allowing the structure to breathe while preventing moisture migration.

    What crack widths can HydroCoat 104 Super seal?

    The crystalline system seals capillaries and cracks up to 0.3 mm within reinforced concrete.

    What substrates are suitable for HydroCoat 104 Super?

    The system is suitable for reinforced concrete designed to BS EN 1992 (Eurocode 2) with crack mitigation to 0.3 mm.

    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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