Couvr Scalp Concealing Lotion makes hair look instantly thicker by eliminating the contrast between thinning hair and scalp. This waterproof formula with natural pigments conceals the scalp, resulting in hair that looks fuller and thicker. It provides long-lasting, subtle color that doesnt rub off or stain. One tube can last between 3 to 4 months and this scalp concealer can be applied to either damp or dry hair.