Is it safe to paint a concrete floor shortly after it has been poured ?
It is usually best to wait for 2 to 3 months. This period can sometimes be shortened to around 2 weeks by artificial aging with a solution consisting of 10 parts zinc sulphate mixed with 90 parts water. After this solution has been applied by a fiber brush it should be rinsed with clear water. The floor should be dry before paint is applied.