Zia’s cement tiles are initially sealed when made to guard the tile throughout transit. That said, they need to be sealed during set up to guard them fully towards grout haze and dampness penetration. It’s a labor of affection. Shades are initially well prepared based on the client’s purchase specs. https://paper.li/~/publisher/d53c2910-5c49-4939-96b7-f0e81f5406b8