Article No. 041620

    SP Top SR

    WTA-compliant restoration render for damp and salt-loaded masonry with especially high sulphate resistance

    Button WTA blau Button G Cert
    Colour: grey (inherent colour) | 0416
    Packaging unit

    Product specifications

    On delivery

    Reaction to fire Class A1
    External surveillance GG-Cert + WTA
    Capillary water absorption w24 ≥ 0.3 kg/m²
    Porosity >50% by volume
    Layer thickness Single-layer, 15 to 30 mm
    Bulk density Approx. 1.15 kg/dm³
    Water requirement Approx. 5.0 - 5.5 l/20 kg
    Water vapour permeability µ ≤ 15
    Water penetration depth < 5 mm
    Compressive strength class CS II (mean 1.5 - 5.0 N/mm²)

    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
    • Plinth areas with and without waterproofing
    • Substrates contaminated with high levels of damaging salts
    • Repair, renovation and restoration of old, damp and salt-loaded masonry


    • High sulphate resistance and low active alkali content (SR/NA)
    • High compressive strength
    • Enables water vapour diffusion
    • Single-layer application thickness up to 30 mm
    • Machine workable
    • Preparation
      • Substrate requirements

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

      • Preparations

        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.

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

        Substrate: absorbent with low strength

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

        Alternative: apply product as a scratch coat (contact layer).

        Substrate: weakly absorbent

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

        Alternative: apply product as a scratch coat (contact layer).

        Substrate: mineral waterproofing grout

        Apply SP Prep (Preparatory Mortar) in nodules to the last grouting layer while wet as a fully opaque bonding layer.

    • Application
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Drying time: can be worked over after 60 minutes
      • Application temperature: min. 5 °C max. 30 °C
      • Application requirements

        Temperature of the material, air and substrate: from min. +5 °C to max. +30 °C

      • One-layer

        Apply product using a suitable tool or machine.



        Roughen the first layer with a render comb.

        Apply second layer once sufficiently dry.

        Embed reinforcement fabric in the upper third of the render, with fabric widths overlapping by at least 10 cm.

        Level off surface with a long float.

        Finish the surface once set.

        Prepare the surface for subsequent layers with a grated scraper after sufficient setting.


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

        On critical substrates (highly uneven and/or fissured) we recommend incorporating the reinforcement fabric in the upper third of the restoration render.

        Apply additional diagonal reinforcement to the edges of building openings.

        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.

        To ensure that the renovation is successful, the relevant drying conditions according to WTA Code of Practice 2-9-04/D must be met.

        Please contact Remmers Technical Service (phone +49 5432 83-153) before applying with machine processing.


    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Mixer, trowel, smoothing trowel, sponge 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
      • Approx. 10.5 kg / cm thick layer / m²
      • Approx. 10.5 kg/m²/cm layer thickness

      • 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.

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

        Deviations from applicable regulations 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.