HeatnBond UltraHold Iron-On Adhesive is a roll of paper backed iron-on no sew double-sided adhesive for bonding fabric without the need for pinning. Ultrahold s no-sew bond is stronger than traditional fusible webs. Now available in two colors: white (for light colored fabrics) and black (for dark colored fabrics). Tips: Pre-wash all materials (without fabric softener) you will be using prior to fusing. Pre-test adhesive on materials prior to fusing. Do not touch iron directly to the adhesive tape. Do not iron directly to your ironing board.