Alcohol Free! Lock in hair fibers with SureThik® Fiber Locking Spray. Our revolutionary formula provides quick drying, weightless hold without the use of alcohol. This medium hold finishing spray is used after applying Hair Thickening Fibers, creating an enhanced bond between natural hair and the hair fibers. Not a hair fiber user? SureThik® Fiber Locking Spray can also be used as an everyday light weight finishing spray. The Locking Spray will help style and add shine without the harmful drying effects caused by other alcohol based hairsprays.