The basics Thick glue-like material used by professionals to tack hair into a shape where it will not move.  The benefits Specifically designed to flatten down hair. The extremely strong formula can even cope with thicker and curly hair. The uses Perfect to use under bald caps where a smooth surface is required. Also for use in body or face painting when you require the hair to be slicked down in place. The bottom line A water-soluble copolymer. Dries to a hard finish. Washes out with shampoo.