Press the sheet Moss on the glue be careful because it may be hot. If you are using a bird bath or something, Now is the time to add it in the center. Try to have it the same amount of space in the front and back.

Now add a bit of glue in the corner like this

Now add Sheet Moss to it while it is still hot. Press it down so that the glue grabs it good.

Add glue right below that spot like this. Then add sheet moss to it the same way you did the other part.