Yes, you can use concealer as a contour product. In fact, many professional makeup artists use concealer to contour the face because it blends perfectly with the skin and gives a natural effect. When using concealer for contouring, it is important to choose a concealer that is two shades deeper than your natural skin tone. Stick concealers are perfect for contouring because they have a creamy formula that blends easily into the skin and glide onto the skin easily, giving you detailed precision. Concealer palettes are also recommended because they generally have a broader range of shades to choose from, which is particularly helpful when working on different clients with varying skin tones. When choosing a concealer for contouring, make sure to choose a formula that is not too dewy or too drying, as this will make it much harder to blend into a natural-looking finish. Some recommended concealers for contouring include Cle De Peaus classic cover-up and Bobbi Browns Instant Full Coverage Concealer.