Domed labels can be applied to many curved surfaces but not all. For anything greater than a very slight curve, we recommend testing extra flexible urethane. An acceptable amount of curve depends upon the size of the label and the amount of adhesive that is in contact with the mounting surface. For example, a ½” diameter circle may bond well to a coffee mug, but will not bond to a pen. And a long rectangular dome that wraps around a curve will adhere better than a square with less surface area.