Lock in color at the roots and banish the gray with No Gray Drops for optimal coverage. These innovative color additives enhance hair color penetration, help prevent early color fade and cover the most resistant grays. Stubborn grays can be challenging to dye due to various factors, such as reduced pigment production and thicker cuticle layers that hinder color penetration. But no worries - we’ve got you, and your grays, covered! No Gray Drops are designed to be mixed with any permanent or semi-permanent hair color, making them easy to use.