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How breathable is a coating of silicone resin emulsion paint?

April 26, 2017breathable Coating emulsion paint resin silicone

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How breathable is a coating of silicone resin emulsion paint?

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Silicone resin emulsion paint is a mineral-like coating and is accordingly just as breathable (water-vapor permeable) as silicate paint and whitewash. The reason for this is its microporous structure, which permits free movement of gases. In the 3-class classification used in European standard EN ISO 7783-2 for water-vapor diffusion current density, silicone resin emulsion paint falls under Class 1 (highly permeable).