Lite Steam-A-Seam 2 (double stick) has pressure sensitive adhesive on both sides. Which allows for a temporary hold to both the appliqué material and the background material. Lite Steam-A-Seam is 1/2 the weight of the regular version, making it ideal for sheer, and lightweight fabrics. Once fused the bond is the same as the original Steam-A-Seam, unfinished edges won't lift or fray, if you choose to finish the edges you can sew through the pressed applique without gumming up your needle or finish the edges with paint.