Flat Backs Hotfix are loose crystal elements with a flat reverse side that has been pre-coated with a heat sensitive glue. These Flat Backs can be easily applied using heat to produce a durable and long-lasting crystal effect. The Swarovski product assortment includes a wide range of Hotfix products. These can be applied simply, quickly and securely. Hotfix technology is ideal for application in the fields of textiles, interior décor and accessories.