Steam-A-Seam 2 Double Stick has the pressure sensitive on both sides which allows for a temporary hold to both the appliqué material and the background material. You can hold your project vertically and the appliqué pieces stay in place and are still repositionable until fused with an iron. Before fusing, tack your project to a wall or try on a garment to check appliqué placement. You're able to reposition pieces while you're wearing them. Once fused the bond is the same as the original Steam-A-Seam. Sold as an individual 1/2" x 20 Yds unit.