Sand down the area of stucco where glue will be applied to remove all paint and primer. Gently rough the adhesion area.
Wipe the area of stucco that has been sanded using a clean, damp cloth. Remove all of the dust created from sanding, as well as any dirt or grime from the stucco wall. When the wall has been cleaned, dry the area with a clean, dry cloth and allow the area to air dry completely before applying glue.
Apply a stripe of urethane-based epoxy adhesive to the perimeter of the item that will be glued to the stucco. Smear additional glue across the back of the item every 6 to 8 inches to ensure maximum adhesion.
Line up the glue-lined item with the sanded stucco area. Firmly press the item against the wall and hold it in place until the glue has set enough to hold the item independently. If possible, use a nail, screw or staple to hold the item in place until the glue has hardened completely.