This add on will double the thickness of your marquee and allow it to sit behind or in front of a piece of plexiglass. You can also sandwich it between two pieces. No plexiglass is included and there is no adhesive. This is not a sticker. Light will shine through the marquee just like it is supposed to. This is an add on only as you will need to purchase this along with a marquee. If you don't want a sticker style marquee this is the way to go.