- Cosmetology board approved, 28 Day Mascara is a non-toxic formula that contains no coal tar derivatives or hydrogen peroxide agents. This fast acting, gentle formula delivers rich, long-lasting color for at least 4 weeks. Processes in less than one minute! No drip formula. Safe and effective. Available in Black and Brown. Note: 28 Day Mascara Kit will only color your lashes. It will not lengthen or thicken them. See our Double Lash & Brow treatment product to lengthen and thicken eyelashes. Kit Contains: 3 mL gel activator, 3 mL cream colorant, x50 cotton shields, reusable applicator stick, and Instruction Sheet. 25 Application Kit.