01732 360 095


  • Versatile Repair and Waterproofing: Diasen WATSTOP, a fibre-reinforced cement/epoxy mortar, is perfect for surface repair, smoothing, damp-proofing walls and slabs, and waterproofing concrete structures. It also serves as an effective primer for various Liquid Waterproofing products.
  • Eco-Friendly Certification: Certified to ISO 14025 standard with an Environmental Product Declaration (EPD), Diasen WATSTOP is environmentally conscious. The EPD details the product’s lifecycle impact, covering material extraction, manufacturing, usage, and end-of-life stages.
  • One Solution, Many Applications: Whether repairing surfaces, damp-proofing, or priming for Liquid Waterproofing, Diasen WATSTOP is a versatile solution. Its fibre-reinforced composition ensures durability, making it an ideal choice for diverse applications.

Fibre-reinforced cement/epoxy workable mortar suitable for surface repair and surface smoothing. Numerous applications including the damp proofing of walls and slabs and the waterproofing of concrete structures, as well as being a primer for a number of Liquid Waterproofing products.

Diasen WATSTOP has been certified to ISO 14025 standard with an Environmental Product Declaration (EPD). This reports the full value chain from material extraction to the manufacturing of the product, usage stage and end of life, declaring the products environmental impact from a lifecycle perspective.

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

    Key Benefits

    • Multipurpose solution.
    • Resistant to up to 9.5 bar of positive and negative pressure.
    • Excellent adhesion to the most common surfaces used in construction.
    • Solvent-free.
    • If applied by trowel it can be applied in just one coat.
    • If applied by roller or brush it can be applied in one or two coats depending on the coverage.

    Typical Applications

    Typical Applications

    • Surface repair to concrete.
    • Smoothing of concrete and mortar.
    • Damp proofing of slabs and walls.
    • Waterproofing of concrete structures such as lift pits and swimming pools.
    • Primer for Liquid Waterproofing Membranes.

    Technical Data

    Technical Data

    Cured Performance Result
    Colour Black
    Membrane thickness – Primer 0.22mm
    Membrane thickness – Gas, vapour control layer & floor DPM 0.44mm
    Membrane thickness – Wall DPM 0.75mm
    Membrane thickness – Waterproofing 1.5mm
    Adhesion to concrete 2.5N/mm2
    Tensile strength Very low
    Elongation Very low
    Loading capability Very high
    Hardness Very high
    Impact resistance Very high
    Puncture resistance Very high
    Water vapour diffusion resistance – Sd value 13.3m
    Water tightness – Positive side 9.5 atm
    Water tightness – Negative side 9.5 bar
    Reaction to fire classification Euroclass E
    Solvent resistance None
    Organic acid resistance None
    Methane transmission rate – Nominal thickness 1.3mm, at
    23°C and 0% relative humidity*
    Carbon Dioxide transmission rate – Nominal thickness
    1.3mm, at 23°C and 0% relative humidity*
    UV Resistance – Stable 10.0 Years
    Freeze / thaw resistance – 50 cycles Unchanged

    * Testing was conducted by an independent laboratory. Test report is available on request

    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.