Yes, Elf Power Grip Niacinamide Primer is indeed a water-based primer. It's designed to provide a smooth and even base for makeup application while also helping to minimize the appearance of pores. The primer contains niacinamide, which is a form of vitamin B3 that has been shown to have a number of beneficial properties for the skin, including improving texture, reducing the appearance of fine lines and wrinkles, and helping to even out skin tone. The water-based formulation ensures that the primer is lightweight and comfortable to wear, while also being non-comedogenic and non-irritating.