I want to spruce up my garage, which has concrete block (cinderblock?) walls in some areas. The garage has always been dry, but I know concrete block retains moisture. So, I was thinking it would be better to use an opaque concrete stain rather than paint. Can I use stain on concrete block? Better to just use masonry paint?
Use an interior waterproofing compound, then paint on top of it for color change.
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