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Dehumidifying, fiber-reinforced, cement-based plaster

Mauersan is a premix formulated with limes and hydraulic binders, microsilic with pozzolanic reactivity, selected aggregates in rational particle size distribution, light spheroidal aggregates of mineral nature (microporous amorphous silica), porogenic additives, hydrophobic agents. Mauersan, thanks to its network of intercommunicating pores, stimulates and accelerates the evaporation of the water contained in the damp walls, while blocking the transmission of liquid water from the inside of the walls to the outside. This dual functionality allows to obtain dry surfaces capable of accommodating various types of finishes, as long as they are highly breathable to water vapor.
Customs code
3824 5090

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    The widespread porosity of Mauersan makes it possible to have adequate expansion chambers for the crystallization of soluble salts (possibly mobilized during the first application phases of the plastering cycle). The Mauersan premix is fiber-reinforced with anti-shrinkage microfibers, it is entirely formulated with raw materials substantially free of soluble salts, it does not contain organic vapor generating substances (VOC) or other raw materials harmful to the health of operators, the environment and the substrates in masonry.
    Fields of application
    Brick, stone and concrete walls, both old and new, subject to capillary rising damp.
    Allowed supports
    Mixed walls (bricks and stones)
    Stone walls
    Natural stones
    Preparation of supports
    • Remove the plaster up to more than 50 cm above any evident humidity or degradation.
    • Remove all loose, crumbly or "rotten" joints, remove the joints from bedding mortars when they are excessively crumbly or inconsistent.
    • In the presence of surface salts, proceed with scraping and brushing up to the edge of the masonry. In the case of strong saline concentrations deriving from particular conditions (stables, salt deposits, walls in contact with brackish water, environments reached by marine aerosol and other critical situations) evaluate the combination of the dehumidifying plaster with chemical barriers (see technical data sheets of CONSILEX BARRIER A, Consilex Inject Mauer, Consilex Barrier Cream products) and / or extraction packs based on adsorbent clays, and / or spraying of Sanareg saline inhibitor.
    • Thorough general cleaning.
    • The regularization of the masonry (any alignments and plumbing), the filling of large cavities, etc., will be carried out after the preparation described above using the Untersana mortar, mixed to the right consistency, possibly with the aid of recollections and / or replacements of particularly deteriorated stone elements.

    Mode of use
    • Where necessary, to promote adhesion of the plaster, apply a transpiring render made with the specific Untersana preparation. The Untersana rough coat, given as a "sprinkle", must create a rough, corrugated surface, capable of favoring the adhesion of the subsequent plaster.
    • The application of Mauersan in two coats is recommended. The first coat should be applied a few hours after applying Untersana (swollen but still fresh), to favor a perfect bond between the two products. The second coat must be applied with a uniform thickness when the first coat of INTOBRATHE is well hardened (wait approximately 24 hours between first and second coat). The application can be carried out with manual methods (trowel, trowel) or mechanical spray methods. In the case of applications with a plastering machine, to allow adequate and homogeneous mixing of the product, it is recommended not to use continuous cycle machines.
    • Prepare the plaster by adding Mauersan to the mixing water, continuing to mix until the desired mixture is obtained and the complete elimination of lumps. It is advisable to apply a minimum thickness of 2.5 cm. For thicknesses greater than 2.5 cm provide for the insertion of Armaglass Intotech 225 reinforcement mesh.
    • Protect fresh surfaces from direct sunlight, rain and wind, take care of prolonged humid curing.
    • Regularize the plastered surfaces with a fine, highly breathable lime-based smoothing compound, Sanastof.

    Application methods
    Brick trowel
    Finishing trowel
    Plastering machine
    Straight edge
    Tool cleaning
    Key features
    Max. recommended thickness
    Max. recommended thickness: 2.5 cm
    Maximum diameter of aggregate
    Maximum diameter of aggregate: 1.5 mm
    Mix with water
    Mix with water: 18 %
    Pot-life: 60 min
    Shelf-life: 12 months
    Temperature of use
    Temperature of use: +5 / +35 °C
    Technical specifications

    Compressive strength after 1 day
    UNI EN 1015-11

    > 2 N/mm²

    Compressive strength after 28 days
    UNI EN 1015-11

    5 N/mm²

    Flexural strength at 1 day
    UNI EN 1015-11

    > 1 N/mm²

    Flexural strength after 28 days
    UNI EN 1015-11

    > 2 N/mm²

    Static elastic modulus
    EN 13412

    < 7000 N/mm²

    Permeability to water vapor
    UNI EN 1015-19

    < 10 μ

    Capillary absorption
    UNI EN 13057

    0.70 kg•h^0.5/m²

    UNI EN 1015-6

    1450 kg/m³

    Bonding force
    UNI EN 1015-12

    0.40 N/mm²

    Thermal conductivity
    EN 1745

    0.30 W/mK

    Reaction to fire
    EN 13501-1

    Approximately 13 kg / m² of Mauersan for each centimeter of thickness to be created.
    Available colors
    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

    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: 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:
    It is forbidden to dispose of the product and/or packaging in the environment.
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