Revlon Realistic Black Seed Oil Curling Custard. DEFINE YOUR CURLS. MAKES HAIR UP TO *87% STRONGER! The power to create everything from shiny spirals to head-turning curls is in your hands. Only Revlon Realistic® Curling Custard is infused with Black Seed Oil, proven to give hair more strength, shine and style! NO MINERAL OIL, NO PETROLATUM, NO SULFATES, NO PARABENS, NO COLORANTS.