• WP Top [basic]

    Article No. 042825

    WP Top [basic]

    Water-impermeable ready-mixed dry mortar

    0428 | grey
    Size / Quantity

    Product specifications

    Reaction to fire Class A1
    Compressive strength ≥ 10 N/mm² (corresponds to CS IV)
    Dynamic E-modulus ≥ 10000 N/mm²
    Bulk density of fresh mortar Approx. 1.9 kg/dm³
    Maximum grain size 2 mm
    Capillary water uptake ≤ 0.1 kg/(m²min0.5)
    Layer thickness Single layer 10 - 30 mm
    Bulk density Approx. 1.65 kg/dm³
    Water requirement 4.1 - 5.2 l/25 kg

    The stated values represent typical product characteristics and are not to be construed as binding product specifications.

    Field of application

    • For use indoors and outdoors
    • Interior waterproofing in the Remmers [basic] system
    • Levelling mineral substrates
    • Water-impermeable render and masonry mortar


    • Water impermeable
    • Stable
    • High sulphate resistance and low active alkali content (SR/NA)
    • Resistant to water, frost and weathering
    • Pore hydrophobic
    • Machine workable
    • Fibre-reinforced
    • Preparation
      • Substrate requirements

        The substrate must be level, clean, dust-free and stable, and free of oil, grease and release agents.

      • Preparations

        Remove plasters, paints and coatings to at least 80 cm above the damaged area or as indicated by examination and scrape out damaged joints to a depth of approx. 2 cm.


        Apply an even layer of Kiesol (1:1 with water).

        Pre-wet highly absorbant substrates with water.

        If necessary, pre-treat salt-contaminated substrates with Salt IH and/or Sulfatex LQ (without Kiesol).

        Bonding layer

        Mix WP Top [basic] to a slurry consistency and apply as a bonding layer to the slightly damp primer.

        Alternatively: apply a bonding layer of WP Sulfatex or SP Prep as a preparatory mortar to the surface once it has been levelled.


        Level out unevenness, depressions > 5 mm and joints with WP Top [basic].

        Apply the plaster to the fresh bonding layer, or after 2-4 days if SP Prep is used as a bonding layer.

    • Application
      • Application temperature: min. 5 °C max. 30 °C
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Apply the product using suitable tools or machine equipment in one or two coats with a layer thickness of min. 10 mm to max. 30 mm.

        When applying two coats, roughen the first coat with a render comb and apply the second coat after sufficient drying.

        After application, smooth the surface with a plasterer's float.

        Finish the surface once set.

        Prepare the surface for subsequent coats after sufficient drying using a grated scraper. Apply subsequent coats after 2-7 days.

    • Application instructions
      • Once it has hardened, mortar must not be made workable again by adding either water or more wet mortar.

        Protect wet mortar surfaces against frost, rain and drying out too quickly for at least 4 days.

        Hairline/shrinkage cracks are safe and are not cause for complaint as they do not impair the properties of the mortar.

        Please contact Remmers Technical Service (phone +49 5432 83900) before applying with machine processing.

    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Mixing tool, trowel, smoothing trowel, plastic float, grated scraper, toothed trowel, plasterer's float

        Clean tools with water while the material is still fresh.

    • Storage / shelf life
      • Protect form moisture
      • Shelf-life 12 months
      • If stored in an unopened container and in a dry place, the product will keep for approx. 12 months.

    • Usage
      • 1.6 kg / mm thick layer / m²
      • Approx. 1.6 kg/m²/mm layer thickness or approx. 1.6 kg/dm³

      • Apply to a large enough trial area to determine the precise amount required.

    • General information
      • May contain traces of pyrite (iron sulphide).

        Do not use on gypsum-based substrates.

        The mixing water must be of drinking water quality.

        Low chromate content in accordance with Directive 2003/53/EC.

        Always set up a trial area/trial areas first.

        Current regulations and legal requirements must be taken into account and deviations from these must be agreed separately.

        The relevant test certificates must be observed when planning and carrying out work.

    • Disposal instructions
      • Larger quantities of leftover product should be disposed of in the original containers in accordance with the applicable regulations. Completely empty, clean containers should be recycled. Do not dispose of together with household waste. Do not allow to enter the sewage system. Do not empty into drains.

    • Safety / regulations
      • For further information on the safety aspects of transporting, storing and handling the product and on disposal and environmental matters, please see the current Safety Data Sheet.