IMPERViTe® HW10 is a blend of isomeric octyltriethoxsilane and siloxane hydrophobic materials which penetrate into the pores of plastered surfaces or natural stone façades preventing the ingress of water or moisture. The resulting reaction between the silicates in the building material create a waterproof, yet vapour permeable silicone resin network within the building product. The carrier of this system is water which enables use of the product in “green” applications. 

The advantage of using this system is that no degradation of the façade occurs over time, the natural appearance of the original building material is preserved and no soiling due to pollutants, algae, dust or dirt can occur. 

The surface onto which the IMPERViTe® HW10 is to be applied must be clean, sound and free of dust and oil. IMPERViTe® HW10 must be applied with a brush, roller or by spraying. 

The first coat must be followed by the second while it is still wet (wet on wet application) to allow proper penetration.

Penetration depth is dependent on the porosity, density and moisture level of the building material. If required, core-drilled samples can be tested afterwards. Penetration can be established by applying water coloured with an ink dye to the side of the core. The depth is measured to the point where staining starts  or is evident. Experience indicates penetration to be between 5 and 10mm.

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The usage is greatly affected by the density of the substrate. Due to their lesser density, brickwork and  mortar uses slightly more. A test area should be done to determine the usage rate per square metre. On  concrete this normally at approximately 500 to 600g/m²