Mapei - Silexcolor Base Coat is a Transpirant, coloured silicate undercoat with a smooth finish and good filling properties for internal and external surfaces.

Recommended Use

• Base filling layer, with quartz granules, for de-humidifying render before applying layered finishing materials from the Silexcolor range.
• Base layer on old organic paint, including paintwork which is slightly flaky, to help the bonding of coloured finishing products from the Silexcolor range.
• Base levelling and filling layer for old render, if not excessively deteriorated or crumbly, before applying layered finishing materials from the Silexcolor range.
• Base layer with the same colour as the final layer, to help cover the final layer of paint or layered finishing material in bright, lively colours, which are clean and only offer partial covering.

Characteristics

Silexcolor Base Coat is a modified potassium silicate-based paint in water dispersion, with micro-granular quartz and selected charges. It is used to even out the absorption of the substrate and promote bonding of successive coats of paint and layered finishing materials from the Silexcolor range. Surfaces treated with Silexcolor Base Coat have a uniformly rough finish, which makes it easier to apply layered finishing materials, particularly when applied by trowel. This results in a more even distribution of the finishing material over the entire surface.

Application Procedure

Preparation of the substrate

New surfaces or surfaces repaired with touch-up mortar must be cured, perfectly clean, sound and dry. Remove all traces of oil and grease and parts which are not well-attached from the surface. Seal any cracks which are present and repair any deteriorated areas. Seal off the porosity and smooth off any uneven parts in the substrate.

Preparation of the product

Silexcolor Base Coat may be used neat, or diluted with 5-10% water or Silexcolor Primer. Make sure that the product is well blended, and use a low speed drill if possible for blending. If only a part of the product is to be prepared, mix the Silexcolor Base Coat in its original container before pouring off the quantity required.

Application of the product

Mix Silexcolor Base Coat well before use, and apply it using conventional techniques with a brush, a roller or by spray (air mix). A single coat of Silexcolor Base Coat is usually sufficient to prepare the substrate. However, if the substrate is particularly uneven, a second coat may be required. Protect from rain for at least 12-24 hours. Silexcolor Base Coat may be painted over after 12-24 hours