Concrete sealer for laying tile on basement slab
As part of an ongoing basement renovation, I am planning to lay tile on the concrete slab. I’ve read that it’s wise to use a concrete sealer between the slab and morter for moisture-proofing purposes–I’ve also read that this sealer should be flexible/elastomeric in order to help prevent cracks in the tile.
I sealed the walls in black liquid rubber foundation sealant and have a few gallons leftover. Would this work? One source said rubber was ideal, but another said a sodium silicate or lithium silicate based sealer was ideal.