Nanogen aquamatch medium brown is a waterproof concealer designed to be used on the scalp for individuals with thinning hair or are sufferinghave suffered from hair loss this unique concealer can help disguise thinning hairlines and will give the appearance of thicker looking hair right up to the hairline covering up thinning areas immediately water resistant nanogen aquamatch is waterproof but washes off easily in the shower it will not rinse off even when completely immersed in water ea