Our black scalp concealer is carefully formulated with cetacea-based trimethylammonium chloride and sodium bicarbonate. Designed specifically for covering sparse hair seams. The usage method is extremely convenient: Before use, keep the scalp dry and clean, open the bottle cap, and apply an appropriate amount of concealer on your fingers or brush. Apply evenly to the root or sparse areas of the hairline. Let it stand for 1 to 2 minutes. After a few minutes, the product will dry and the color will be fixed. And it adopts a bottle design, which is easy to operate and suitable for going out and daily use.