Dax Wax Washable Hair Wax (99g). Dax Wax Washable Hair Wax is a thick, petroleum based hair dressing which is excellent for use with short to medium length hair. Dax Washable Wax is the ultimate hair styling product as it offers the same, long-lasting hold as Dax Wave and Groom but washes out easily with shampoo. For best results, place the desired amount of Dax Hair Wax between palms and apply to clean, damp or dry hair. Then, use fingertips to spike, sculpt or style as desired.