Livellina HS

Livellina HS is a pre-mixed, grey-coloured mortar, based on a mixture of special cements, selected aggregates, synthetic resins and specific additives. Once mixed with water, the result is a product of excellent workability, fluid and self-levelling, free from sedimentation and surface efflorescence, easily applied by trowel in thickness from 5 mm to 40 mm, with excellent adhesion to the substrate. Once hardened it has good mechanical strength, impact and abrasion resistance, with a smooth and dustproof surface. It is totally free of protein-based fluidizing additives and substances that release formaldehyde and ammonia. The use of special polymers allows to obtain a very low emission of volatile organic substances. Livellina HS is classified CT-C25-F6 according to EN 13813.

Instructions for use

Preparation for installation
The substrate must be clean and sound, free of dust, brittle material and dirt in general. Residues of oil and grease, if any, must be carefully removed. Clean away any residue of adhesives from old floors that have been removed (carpet, PVC, parquet, etc.). Smooth, non-absorbent substrates must be roughened beforehand by bush-hammering or other mechanical treatment. In the case of very porous and absorbent substrates, and in the case of magnesium and anhydrite-based substrates, apply a coat of Tile Primer beforehand and wait for it to dry completely (until the applied film is transparent). In the case of particularly smooth substrates, it is preferable to apply one coat of Multigrip and wait for it to dry completely.

Preparation of the product
Mix Livellina HS with about 18-20% of water (equal to 4.5 – 5.0 litres per 25 kg bag), possibly using a low-speed drill with a suitable propeller; mix until the mixture is homogeneous and free of lumps, with a fluid and self-levelling consistency. Do not exceed the maximum amount of mixing water indicated, as this will not improve the self-levelling properties, but may cause a weakening of the surface of the hardened product. Leave the mixture to stand for about 4-5 minutes, then mix briefly. The mixture prepared in this way has a pot life of about 30 minutes under normal conditions (at +23 °C); higher temperatures shorten the pot life and lower temperatures lengthen it. It can be used with the following mixing and application machines: PFT G4 with Rotomix, Putzmeister MP 25 with secondary mixer, Collomatic planetary mixer XM2-650, Inotec-ino COMB M4G with secondary mixer, M-TEC Duo mix 2000, Turbosol Giotto Mono with secondary mixer and others.

Application instructions
Wet the substrate until it is saturated and allow any excess water to evaporate or remove it with a sponge, taking care to eliminate any residual surface water; if a preventive treatment with Tile Primer has been applied, there is no need to wet it. Pour the mixture and distribute it on the surface with an American trowel in the desired thickness in a single coat, without exceeding 40 mm in thickness; the final levelling is performed by itself. In order to obtain a perfectly smooth surface and to facilitate the release of any embedded air bubbles, pass over the entire surface with a special roller with pins longer than the maximum thickness applied. In the case of application on large surfaces, it is necessary to respect the joints already present in the substrate and to create new ones at intervals of no more than 5 metres. If the thickness required is greater than 40 mm, and in any case only for small localised areas, it is necessary to fill the deeper areas with a first coat, so as to bring the whole surface to be treated to a uniform level. As soon as this first coat can be walked on (after about 3 hours at +23 °C), apply a coat of Tile Primer or Multigrip and wait for it to dry completely (until the layer applied is dry to the touch); then apply a second coat of Livellina HS over the entire surface to be treated, always with a maximum thickness of 40 mm.

Cleaning
The tools used for laying can be cleaned with water before the material hardens; afterwards cleaning can only be carried out by mechanical removal.

Storage

Livellina HS must be stored in a dry and sheltered place. In the original closed bags it is kept for at least 9 months. PROTECT FROM HUMIDITY.

Warnings

• Do not apply Livellina HS at temperatures below +5 °C or above +30 °C.
• Never mix with other binders such as cement, hydraulic lime, gypsum, etc.
• Never add water once the mixture has hardened.
• Do not use the mixed product when it has already begun to set, therefore take care to prepare a quantity of mix that can be used within its pot life.
• Never apply the product outdoors or in environments subject to the continuous presence of water or rising damp.
• Do not use as a floating screed or on a separating layer.
• Apply on thin-film radiant systems laid directly on rigid support.