$$$ BeneFit Speed Brow ($14) works well as a sheer brow tint while helping to groom and keep stray hairs in place. A Clear Speed Brow option is available, as are shades for dark blonde to light brown and medium to dark brows. Speed Brow dries quickly and the brush is small enough to allow for precision grooming of thin or sparse brows. However, if you're considering the Clear Speed Brow, keep in mind that a container of Maybelline New York's Great Lash Clear Mascara is similar, costs one-third the price, and has four times as much product.
Source: Paula Begoun