I'm Cooie Grey-Lavin, and in this clip I'll show you how to glue down the materials you're using in your mosaic stepping stones. When you're done and feel satisfied with the design you have, you've laid your tiles out, then you mix up your thin-set. You can buy it at any hardware store or tile store. It's a fine powder, and it's the mortar that you're going to use as a glue. You mix the powder with a little bit of water and you want it about the consistency of peanut butter. After you mix it, you let it sit for about fifteen minutes. Because it is a concrete, there is a chemical reaction that has to happen, so it has to set up for a few minutes. Once you've got it set up the way you want it, and you've got it the right consistency, this is a little thin, we need a little bit more for this one, get all the lumps out, let it sit. You can do this in your final design stage so it's all ready to go. After it sets up, I take an old butter knife, and you take just a little bit of glue, pick up the tile, little piece of the thin-set. Again, you don't want to cover up too much because you need to leave room for your grout. Gently place it in place and move on. The other way to do it is actually put some of the thin-set down on the tile itself first, put the piece over it, and gently press in. It doesn't matter which way you do it as long as you have a good adhesion with the tile. Then, after you've glued your whole piece, you have everything the way you want it, you have to let it sit and cure for 24 hours. Remember, to mix the thin set, let it set up for fifteen minutes, then remix it. Then you can apply your tiles and various pieces to your stepping stone with the thin-set, then let it cure for 24 hours before you grout.