Rit DyeMore For Synthetics was created for dyeing synthetic fabrics. Perfect for rejuvenating faded clothing upcycling and hiding laundry accidents. With 250+ color recipes available on Rit website it is almost certain you ll find the right color for your needs. When dyeing synthetic fabrics you must use a stainless-steel pot on your stove top to maintain a high-water temperature throughout the duration of dyeing. DyeMore is a liquid dye.