Silicon plaster – PASTI SIL
USE
PASTI SIL is silicone thin-layer structural plaster 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.
PROPERTIES
PASTI SIL is ready-to-use paste-like plaster based on silicone resins and dolomite aggregate with grain size from 1.0 mm to 2.0 mm. It is efficient, convenient and easy to use. When dry, it forms permanent hydrophobic plaster coatings characterised by very good adhesion to typical mineral substrates. It is non-absorbent and has the self-cleaning ability, reducing the possibility of microorganism development. Moreover, PASTI SIL contains additives that reduce development of mould and fungi on plaster surface. The silicone plaster forms a porous layer characterised by very high vapour permeability, ensuring free transport of water vapour and giving up humidity through the material on which it si applied. It is also washable, resistant to weather and aggressive components of substrates and natural environment. PASTI SIL is available in variety of colours.
SUBSTRATE PREPARATION
The substrate should be stable, even and structurally sound i.e. strong enough; it should be free from anything that may weaken adhesion, in particular dust, dirt, lime, oil, grease, wax, remains of emulsion and oil paint. Remove existing paint and render coats of insufficient adhesion.
APPLICATION
Apply PASTI SIL 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 PASTI SIL – with circular moves. Open time of the mass (between mortar application and floating) depends on substrate absorptivity, 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 contact spot will be visible. Anticipate the gaps in advance e.g. in corners or building edges, under rainwater pipes, etc. Protect the plastered surface during work and when it dries from direct sunlight, wind and precipitation. Note: to avoid differences in colour shades in case of colour silicone plasters, apply plasters of the same production date on the same surface. If the renders are used in thermal insulation systems, avoid dark colours with reflection coefficient of scattered light below 20%. Share of the plasters in such colours should not exceed 10% of façade surface.
PACKAGING
Plastic buckets: 25 kg
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STRUCTURE
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TECHNICAL DATA
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Adhesion |
1.5 MPa |
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Density |
ca. 1.9 g/cm3 |
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Substrate and ambient temperature |
From +5°C to +25°C . |
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Temperature resistance |
od -20°C do +60°C |
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Drying time |
from 12 to 48 h |
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Diffusion resistance |
≤ 0,2 m |
