Nu-Flex HTS binds the fibers and provides excellent fray resistance avoiding skin irritation when cutting and handling. The color binder may degrade at operating temperatures above 200 °C. Its expandability and flexibility enables it to slip over irregular shapes and electrical connections to provide effective thermal, mechanical and electrical protection. - Nu-Flex HTS is a fiberglass braided sleeve that has been heat treated to remove all organic contaminants and then saturated with an acrylic binder. The acrylic binder can be dyed in many colors for code and identification purposes.