A quick question (I hope). I am tiling a shelf at the head end of the bath and would like to tile the end of it as well. This will be a single piece of tile probably no more than 75mm x 20mm attached to endgrain ply. Is normal tile adhesive going to be ok for this, I am using Weber.fix plus? Or, should I use something different, maybe a polyurethane or even epoxy type adhesive?