• Compress Render

    Article No. 107316

    Compress Render

    WTA-compliant salt-bonding render/sacrificial render

    Colour: Compress Render | 1073
    Colour: Compress Render | 1073
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    Product specifications

    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
    • Removal of salt and reduction of moisture
    • Sacrificial render on salt-containing substrates
    • Buffer layer under renders mixed according to historical formulations
    • Old buildings, cellars and facades


    • High salt storing capacity
    • Capillary-active
    • Reversible
    • Preparation
      • Substrate requirements

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

      • Preparations

        Pre-wet the substrate so that it is slightly moist.

        Remove render, paint layers and coatings at least 80 cm above the damaged area.

        Chase out friable joints to a depth of at least 2 cm.

        Apply product as a scratch coat (contact layer).

    • Application
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Application temperature: min. 5 °C max. 30 °C
      • Apply product using a suitable tool or machine.

        Level off surface with a long float.

        Finish the surface once set.

        If applying an additional coating, use a grated scraper to roughen the surface once it is sufficiently dry.

        Waiting time before application of further layers: 3 days.



        Single layer thickness up to 20 mm.



        Layer thickness per coat 10 - 20 mm.

        Layer thickness up to 30 mm wet-on -wet.

        Layer thickness 30-40 mm, apply second layer once the first is sufficiently dry (approx. 12-24 hours).

        Roughen the first layer with a render comb.

    • 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.

    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Clean tools with water while the material is still fresh.

    • Storage / shelf life
      • Protect form moisture
      • Shelf-life 6 months
      • Dry, in unopened containers, 6 months.

    • 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.

        Deviations from applicable regulations must be agreed separately.

    • 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.