Rusk Radical Anti Curl 3- Resistant Formula kit Chemical treatment. Curl adjuster. Frizz controller. Anti-humectant. For clients with old or unwanted perms, or clients with naturally curly or frizzy hair in need of control. Also for clients with uneven hair texture. Removes old or unwanted perms. Controls naturally curly hair. Controls hair that frizzes in high humidity. Prepares the hair for a fresh texture. Evens hair that has dual textures.