Hagen strong adhesion 8-piece hanger 20x30 Wrought Iron Basket Strong adhesion is achieved after waiting 6 to 12 hours after the hanger apparatus is attached. It adheres to rough and smooth surfaces (marble and tile, etc.). The adhesive can be wiped with acetone before it dries. The adhesive can be removed by cutting it with a spatula. There is a risk of paint breaking on painted walls. It does not stick to plastic surfaces.