Concealers also work for contouring if you use a concealer that is two shades darker. The company produces lipsticks, concealers, setting powders, highlighters, lip products, jackets, and mirrors. Concealers with yellow undertones are used to hide dark circles. Liquid concealers can also have buildable coverage in different finishes to suit every need. Depending on your skin type certain concealers work best on your skin.