I am restoring the interior of a building which has a poured concrete floor and block walls. Previously, both the walls and the floor were painted, but since at one end of the building the ground rises several feet up the wall on the outside, the moisture from the earth managed to seep through just a little, causing damp on the floor and wall in that area, and eroding the paint. What product would you recommend to solve this slight dampness? would its use require me to remove the old paint completely (which would be a chore)? I intend to panel the walls and repaint the floor, and do not want recurrence of the problem. SAMPLE - AFM SafeCoat, WaterShield Concrete & Masonry Sealers

Question

I am restoring the interior of a building which has a poured concrete floor and block walls. Previously, both the walls and the floor were painted, but since at one end of the building the ground rises several feet up the wall on the outside, the moisture from the earth managed to seep through just a little, causing damp on the floor and wall in that area, and eroding the paint. What product would you recommend to solve this slight dampness? would its use require me to remove the old paint completely (which would be a chore)? I intend to panel the walls and repaint the floor, and do not want recurrence of the problem. SAMPLE - AFM SafeCoat, WaterShield Concrete & Masonry Sealers

Status: Open Jan 21, 2020 - 01:40 AM

1answer

Answer

Jan 24, 2020 - 03:44 AM

It's best to stop water coming through the wall in the first place, so we suggest consulting a contractor to solve that issue. Then apply AFM Dynoseal to the exterior, below-grade surface of the wall. For your interior, you will need a penetrating sealer because paint alone will not prevent moisture intrusion. We recommend our Green Building Supply Penetrating Concrete Sealer. However, for this to be applied, the concrete needs to be clean dry and free of paint and other sealers. Use Blue Bear 600GL Coatings Remover, then clean that off with Blue Bear 700DG DeGreaser. Dry out the walls and floor as much as you can, then seal the concrete and concrete blocks with Green Building Supply Penetrating Concrete Sealer. If you wish, you can paint over the GBS sealer.