Silicone Impregnator on the Back of a Tile

If you apply a silicone impregnator to the back of a tile before setting, this may cause a bonding problem. Since most setting mortars are water based they will want to repel the water. Use an epoxy-type setting material.

TIP: Before setting any stone tile check to make sure that it has not been sealed. Place several drops of water on the backside of the tile if the water beads you may experience a setting problem.