Q.- I am getting ready to stain the concrete slab in a sun porch using products from Concrete Camouflage. The slab is divided into 4 pieces by grooves cut in the floor to control cracking. These cuts are about 3/16 inch wide by 2 inches deep. The slab is 5-6 inches thick.
I plan on cutting some more grooves of the same width and using these with the crack control grooves to create a pattern. These new grooves will be just deep enough to grout. 1/4 inch or so.
My question is, what do I use to fill crack control cuts? I assume there will be movement which would cause grout to crack. Can I use a sanded caulk that matches the grout to fill these grooves? I would use backer rod under the caulk.
I understand that the grouting should be done after the first layer of sealer. Would this be the same for the caulk? This implies that I should use a paintable caulk.