Cover Your Gray Professional Waterproof 1.7 g Perfect for perfectionists, the Professional series is a fine applicator ideal for covering scattered gray hair or at the hairline. This waterproof solution is ideal for natural roots that appear in one place; Also perfect for strands of long hair that require full and precise coverage. Waterproof formula; Lasts up to 2 washes; Washes out easily with shampoo; Fine applicator. Ideal for patchy gray hair, long strands of hair and for natural hair roots that appear in a single section. No water needed, just open the applicator and apply; Does not stick or clump.