A seamless undermount sink system includes a countertop having a sink mounting aperture disposed therethrough. The system also includes a sink having a sidewall with a rimless upper edge therearound. A mounting assembly includes a mounting bracket attached to a portion of the sink and a mounting gasket which is secured to a bottom surface of the countertop. An interface is formed between the rimless upper edge of the sink and the sink mounting aperture through the countertop. A sealant is disposed in the interface between the rimless upper edge of the sink and the sink mounting aperture though the countertop to prevent water, food, or other debris from getting in between the sink and the countertop.