9. Protection of concrete surfaces (painting, coating)
9.1 Substrate preparation
Before applying a protective coating to a concrete surface, a few precautions must be taken.
Moisture content must be less (by mass) than 5%. This moisture releases the cement's alkalinity, and saponification risks are incurred when applying greasy products (alkyd and glycerophtalic paints), and to a lesser degree with polyvinyl acetate paints.
Painting work must comply with the rules of the trade: DTU 59-1 for paints and thin films, and DTU 59-2 for thick plastic coatings (RPE).
This implies that the substrate must be prepared to be sound and consistent. The following operations are necessary: stripping, brushing, sanding, dusting, sanding, etc.
Applying a primer...
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Protection of concrete surfaces (painting, coating)
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