• SP Prep

    Article No. 040030

    SP Prep

    WTA-compliant preparatory mortar

    0400 | grey (inherent colour)
    Size / Quantity

    Product specifications

    On delivery

    Compressive strength (28 d) CS IV (> 6.0 N/mm²)
    External surveillance GG-Cert + WTA
    Maximum grain size 3.15 mm
    Aggregate as per DIN EN 13139
    Layer thickness Max. 5 mm
    Bulk density Approx. 1.7 kg/dm³
    Water requirement Approx. 5.0 l/30 kg
    Water vapour diffusion resistance coefficient µ ≤ 15
    Water penetration depth After 1 h > 5 mm

    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
    • Preparation of the substrate before applying mineral-based renders
    • Equalising differences in the absorption properties of the substrate


    • Good adhesion to the substrate
    • High sulphate resistance and low active alkali content (SR/NA)
    • Preparation
      • Substrate requirements

        Clean, dust-free and capable of supporting a load.

      • Preparations

        Pre-wet absorbent substrates so that they are slightly damp.

    • Application
      • Application temperature: min. 5 °C max. 30 °C
      • Mortar cover / Filling knife / Trowel application
      • Absorbent substrates

        Apply as a net-like bonding layer (surface coverage 50-70%) in a layer thickness of max. 5 mm.


        Interior waterproofing and substrates with low absorption capacity

        Apply the product over the entire surface (100% coverage) in a layer thickness of max. 5 mm.


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

        Do not use the material to level out uneven surfaces.

        Apply render after 2-4 days.

        Improve the adhesion on smooth and dense surfaces using ZM HF [basic] .

    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application
      • Mixing tool, trowel, steel broom, render coating sprayer, hopper gun

        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
      • 4 - 6 kg / mm thick layer (full-surface cover)/ m²
      • Full coverage 4 - 6 kg/m²

      • 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.