I am preparing to install a 12 x 12 ceremic tile floor in the kitchen of my home in Oklahoma City. I have heard that boiled linseed oil is a good protectant and grout sealer. Do you have additional information? What type grout material should I use? I want to maintain the light color grout without fear of discoloring and absorbtion of dirt in the future. Is there a preferable glue, mastic or some kind of adhesive you would recommend?