The basics Lite Steam-A-Seam 2 is a heat-activated, pressure sensitive fusible web. The benefits Lite Steam-A-Seam 2 Double Stick has pressure sensitive adhesive on both sides which allows for a temporary hold to both materials.  The uses Lite fusible web is perfect for appliqués and crafts on more delicate fabrics. The bottom line You can hold your project vertically and the appliqué pieces stay in place and are still repositionable until fused with an iron.  Once fused, the bond is permanent and machine washable and dryable.