• Fill RZ Historic

    Article No. 056405

    Fill RZ Historic

    Mineral surface filler and fine render based on natural cement

    grey-beige (intrinsic colour) | 0564
    Size / Quantity

    Product specifications

    On delivery

    Compressive strength (28 d) ≥ 6.0 N/mm²
    Bulk density of fresh mortar Approx. 1.9 kg/dm³
    Particle size ≤ 0.3 mm
    Air void content ≤ 10 vol.%
    Layer thickness Single layer 1 - 5 mm
    Bulk density Approx. 1.1 kg/dm³
    Water requirement 1.25 l/5 kg
    Compressive strength class CS IV

    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
    • Patching up historical facades
    • Mineral surface filler for use in interior and exterior areas


    • Slow development of strength
    • Can be felted
    • Single layer thickness 1 - 5 mm
    • This natural cement has been produced to the same formulation for more than 150 years and is also called Roman cement. It is based on a lime-marl from the Cretaceous period traditionally fired in a shaft kiln at low temperature.
    • Preparation
      • Substrate requirements

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

      • Preparations

        Pre-wet the substrate.

        Pretreat highly absorbent substrates with Primer Hydro F.

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

        Using a suitable tool, apply the product as a contact layer.


        Apply product in the desired coating thickness.

        Smooth the surface using a suitable tool.

        Carry out subsequent surface treatment after material has stiffened.


    • 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.

        Do not use different material batches for continuous surfaces.

        Slight deviations in colour between different batches are possible.

    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application
      • Mixing tool, trowel, smoothing trowel, sponge float, felt float trowel

      • Clean tools and equipment with water before the mortar sets.

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

    • Usage
      • 1.5 kg / mm thick layer / m²
      • Approx. 1.5 kg/m²/mm layer thickness

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

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

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

        The characteristic data of the product were calculated under laboratory conditions at 20°C and 65% relative humidity.

        The mixing water must be of drinking water quality.

        Always set up a trial area/trial areas first.

        Do not use on gypsum-based substrates.

        The colour that is obtained after drying and hardening depends on the ambient conditions and the processing method. For instance, a freshly smoothed surface will be lighter than one that is smoothed later or roughened. Different grain sizes of the same product may lead to slight differences in colour. Substrates soaked from the back may cause discolouration.

        Alkaline binders may cause a dissolution process on non-ferrous metals.

        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.