SILICATE DECORATIVE RENDERS FOR MANUAL APPLICATION
OF RUSTIC TEXTURE
FOR INTERNAL AND EXTERNAL USE
AGGREGATE THICKNESS: up to 2 mm

USE

AVAL KT 73 is silicate thin-layer structural render designed for manual preparation of decorative external and internal plaster coatings. It can be used on all even and structurally sound mineral substrates such as concrete, traditional cement plasters, cement plasters, plasterboards and reinforced layers in the following External Wall Insulation systems: AVAL and AVAL ROKER. It is recommended to use AVAL KT 73 for finishing partition walls of high vapour permeability e.g. walls made of cellular concrete.

PROPERTIES

AVAL KT 73 is ready-to-use paste-like render based on water glass and marble aggregate with grain size up to 2 mm. It is efficient, convenient and easy to use. When dry, they form hydrophobic plaster coatings of very good adhesion to typical mineral substrates. AVAL KT 73 form layers of very high vapour permeability ensuring free transport of water vapour and giving up humidity through the material on which they are applied. It is also washable, resistant to weather and aggressive components of substrates and natural environment. Moreover, AVAL KT 73 contains organic agents that reduce fungi and mould development on render surface. AVAL KT 73 renders are available in 352 colours shown in the AVAL COLOUR PALETTE.

SUBSTRATE PREPARATION

The substrate should be stable, even and structurally sound i.e. strong enough; it should be free from anything that may weaken render adhesion, in particular dust, dirt, lime, oil, fat, wax, remains of emulsion and oil paint. Remove existing paint and render coats of insufficient adhesion. Afterwards, prime the substrate using AVAL KT 52. Fill in irregularities and defects using e.g. AVAL KM 41 levelling mortar, AVAL KT 111 plastering mix or AVAL KT 29 finishing mortar. In each case, before application of AVAL KT 73, cover the substrate with AVAL KT 15 silicate primer.

MIX PREPARATION

AVAL KT 73 is ready to use. It may not be combined with other materials, diluted or thickened. Immediately before application, stir it in order to achieve homogenous consistency.

APPLICATION

Apply AVAL KT 73 over prepared substrate as an even layer using a float made of stainless steel. Thickness of the layer should correspond with the aggregate grain size. Remove excess of material, place it in the bucket and mix. Form texture of the surface using a float made of plastic: in case of AVAL KT 73 – with vertical, horizontal or circular moves depending on the expected line arrangement. Open time of the mass (between mortar application and floating) depends on substrate absorption, ambient temperature and mass consistency. Experimentally (for a given type of substrate and given weather) determine the maximum area that can be prepared in one cycle (application and floating). Apply the mix using the “wet on wet” method, preventing one batch from drying before application of another one. Otherwise the “seams” will be visible. Plan technological gaps in advance e.g. in corners or building angles, under rainwater pipes, etc. Protect the plastered surface during work and when it dries from direct sunlight, wind and precipitation. Drying time depends on the substrate, temperature and relative humidity of air and is from ca. 12 to 48 hours. In case of increased humidity and temperature ca. +5°C, render setting time may extend. Substrate and ambient temperature during work and when render dries should be from +5°C to +25°C. Note: to avoid differences in colour shades in case of colour silicate renders, apply render of the same production date on the same surface. If the renders are used in External Wall Insulation systems, avoid dark colours with reflection coefficient of scattered light below 20%. Share of the renders in such colours should not exceed 10% of façade surface. Before plastering, carefully protect all nearby elements e.g. glass, woodwork, flashing, etc. against the render as it is difficult to remove it without damaging the substrate. The information comprises basic instructions of product application and do not relieve users of responsibility for work in accordance with good construction practice and OHS regulations.

CONSUMPTION

On average, ca. 3 kg of AVAL KT 73 -200 is sufficient for 1 m2 The exact amount of mix used can be determined in a test conducted on the plastered substrate.

TOOLS

Drill with mixer or smooth floats: made of steel and plastic. Wash the tools with clean water directly after use.

PACKAGING

Plastic buckets: 25 kg Pallet: 400 kg in 25 kg buckets

STORAGE & TRANSPORT

Store and transport in tightly closed buckets in dry conditions, ensuring positive temperature (pallets are particularly recommended). Avoid overheating and moisture. Shelf life is 12 months from the production date on the packaging.

CAUTION

Contains water glass. May be aggressive to metal, glass and wood. Protect eyes and skin. In case of direct contact with eyes, seek medical attention.

TECHNICAL DATA

Adhesion to concrete – min. 0.3 MPa Temperature Substrate and ambient temperature during work – from +5°C to +25°C Temperature resistance – from -20°C to +60°C Density – ca. 1.9 g/cm3 Diffusion resistance – max. 2 m

CERTIFICATES

AVAL KT 73 render is a part of External Wall Insulation systems of external building walls: - AVAL - ETA - 06/0187 - AVAL ROKER - ETA 06/0281