Untersana zoom
Untersana image 1
Untersana image 2
Untersana image 3


Breathable, dehumidifying scratch coat, based on hydraulic lime

With the addition of mixing water only, this single-component premix creates a breathable, dehumidifying rough coating, preparatory to the application of restorative, dehumidifying, thermal-insulating and anti-condensation plasters, specifically Intosana, Sanatigh, Sanawarme and Caleosana, being plasters designed specifically for the healthiness of new buildings, existing buildings, works on green buildings and in the restoration of historic and monumental buildings.
Customs code
3824 5090

Request product info

    By submitting I agree to the privacy notice

    Obtained Certifications and Regulations
    Lines of belonging
    Linea prodotto Building
    Linea prodotto Opus
    Linea prodotto Sanageb
    Thematic site
    Opus DrySanagebSanawall
    Features and benefits
    Where it is used
    How to use
    Technical data
    Additional content
    Warnings and precautions
    Related products


    Untersana is composed of hydraulic lime, botticino, kaolin, calcium caseinate, Vichy salt, tartaric acid and natural fibres. Does not contain cements, resins, solvents, thinners and radioemissive aggregates.
    Fields of application
    Anchoring scratch coat (applied by "spraying" or "splashing") for the formation of an adhesive bridge for easy grip of subsequent plasters, dehumidifying, breathable, based on hydraulic lime.
    Allowed supports
    Mixed walls (bricks and stones)
    Stone walls
    Preparation of supports
    Application surfaces should be clean, free of soiling, crumbling and non-adhering parts, dust, etc., conveniently saturated with water until they reach the condition "saturated with dry surface".
    Mode of use
    Pour about 2/3 of the mixing water into the mixer, add Untersana and the remaining water; continue to mix until a homogeneous lump-free mixture is obtained. The mixing water should be about 22-25% of the weight of the bag. After mixing is completed wait a few minutes before applying.

    "Spray" the product, with plastic fluid consistency, on the application supports, with plastering trowel and brick trowel or with plastering pump. Protect fresh surfaces from direct exposure to sunlight, from the rain and wind, cure the prolonged moist hardening.

    Application methods
    Brick trowel
    Finishing trowel
    Plastering machine
    Tool cleaning
    Key features
    Maximum diameter of aggregate
    Maximum diameter of aggregate: 1.5 mm
    Min. recommended thickness
    Min. recommended thickness: 4 mm
    Mix with water
    Mix with water: 18 - 20 %
    Pot-life: 60 min
    Shelf-life: 12 months
    Temperature of use
    Temperature of use: +5 / +30 °C
    Technical specifications

    Compressive strength
    UNI EN 1015-11

    > 10 N/mm²

    Flexural strength
    UNI EN 1015-11

    > 3 N/mm²

    UNI EN 1015-19

    14 μ

    Capillary absorption
    UNI EN 1015-18

    0.48 kg•h^0.5/m²

    Thermal conductivity

    0.298 W/mK

    Bonding force
    UNI EN 1015-12

    > 1 N/mm²

    Total recycled content
    UNI EN 14021:2021

    2.6 %

    Reaction to fire
    EN 13501-1


    Specific heat
    UNI EN 1745

    1 kJ/kgK

    Static elastic modulus
    EN 13412

    10000 N/mm²

    UNI EN 1015-6

    1650 kg/m³
    From 4 to 6 kg of Untersana per square metre of surface to be rendered.
    Available colors
    Light gray
    Packaging and dimensions
    Bag 25 kg
    Pallet: 50 x (Bag 25 kg)
    Storage and conservation
    Store the product in its original packing, in a fresh and dry environment, avoiding frost and direct sunlight.
    Additional content

    For a proper adhesion of the next plaster, it is appropriate to apply the latter before the complete curing of the rendering Untersana (within 24-36 hours).The general information, along with any instructions and recommendations for use of this product, including in this data sheet and eventually provided verbally or in writing, correspond to the present state of our scientific and practical knowledge.
    Any technical and performance data reported is the result of laboratory tests conducted in a controlled environment and thus may be subject to modification in relation to the actual conditions of implementation.

    Azichem Srl does not assume any liability arising from inadequate characteristics related to improper use of the product or connected to defects arising from factors or elements unrelated to the quality of the product, including improper storage.
    Those wishing to utilise the product are required to determine prior to use whether or not the same is suitable for the intended use, assuming all consequent responsibility.

    The technical and characteristic details contained in this data sheet shall be updated periodically. For consultation in real time, please visit the website: www.azichem.com. The date of revision is indicated in the space to the side. The current edition cancels out and replaces any previous version.

    Please note that the user is required to read the latest Safety Data Sheet for this product, containing chemical-physical and toxicological data, risk phrases and other information regarding the safe transport, use and disposal of the product and its packaging. For consultation, please visit: www.azichem.com.
    It is forbidden to dispose of the product and/or packaging in the environment.
    Photo gallery
    Technical Documentation

    Request product info

      By submitting I agree to the privacy notice

      Copyright © 2024 All Rights Reserved
      Powered by Webplease